NITRO PAHs

1042530
Title:Separation of nitro-polycyclic aromatic hydrocarbons by micellar
electrokinetic chromatography with photodiode-array detection.
Author:Jia, L. ; Yan, J. ; Gao, J. ; Chen, X. ; Hu, G. L. ; Wang, Y. R. ;
Xu, M. S. ; Wang, X. R.
Author Affiliation:Anal. Sci. Lab., Dept. Chem., Xiamen Univ., Xiamen
361005, China
Journal:Microchem. J.   Vol59   Iss3   Pg364-371
Publication Date:Jul 1998
CODEN:MICJAN   ISSN:0026-265X
Language:English
Document Type:Journal
Abstract:A study of the effects of organic modifiers, viz. methanol (MeOH),
acetonitrile (ACN) and dimethylformamide (DMF) and .beta.-cyclodextrin
(.beta.-CD) on the separation of 5 nitro-PAH (listed) by MEKC is presented.
Portions of a mixed standard solution of 0.491-2.65mM-nitro-PAH were
separated on a polyimide-coated capillary (64.5 cm x 150 .mu.m i.d.; 56 cm
to detector) operated at 20.degree.C with pressure injection (50 mbar, 3 s)
and an applied voltage of 20 kV. The carrier electrolytes contained
10mM-sodium dihydrogen phosphate, 20mM-Tris, 70mM-sodium deoxycholate and
10-50mM-.beta.-CD (or various concentrations of MeOH, ACN or DMF) adjusted
to pH 9.9 with concentrated NaOH. Results showed that DMF (10-20%) was the
most useful organic modifier for separating the nitro-PAH. ACN (30%) also
improved the separation of nitro-PAH except for 1-amino-and
2-nitronaphthalene.
Chemical Substance(s):nitro-compounds, polycyclic aromatic )
End of record 1
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 Record 2 of 92 for NITRO AND PAH                           Go to record 3

1042558
Title:Sorption tubes packed with polydimethylsiloxane: a new and promising
technique for the preconcentration of volatiles and semi-volatiles from air
and gaseous samples.
Author:Baltussen, E. ; David, F. ; Sandra, P. ; Janssen, H.-G. ; Cramers,
C. A.
Author Affiliation:Lab. Instrumental Anal., Eindhoven Univ. Technol., 5600
MB Eindhoven, Netherlands
Journal:J. High Resolut. Chromatogr.   Vol21   Iss6   Pg332-340
Publication Date:Jun 1998
CODEN:JHRCE7   ISSN:0935-6304
Language:English
Document Type:Journal
Abstract:A 325-mg cartridge of dimethylsilicone particles (0.24 to 0.4 mm
diameter, obtained by grinding Silastic silicone tubing) was used as SPE
adsorbent for volatile and semi-volatile organic analytes from air and
vapours. Results were compared with those obtained for 44 compounds
(listed) in seven test mixtures with use of four conventional solid
adsorbents. After adsorption, tubes were desorbed thermally at up to
200.degree.C (dimethylsilicone) or 250.degree.C (conventional adsorbents)
in a dual-injector thermodesorption system as online pre-column for GC-MS;
the GC column was temperature programmed from 40.degree.C (held for 3 min)
to 250.degree.C at 10.degree./min and mass-selective detection. Use of
dimethylsilicone has also been applied to determination of PAH and of
nitro-PAH in air. Tabulated results are presented and indicate that
dimethylsilicone performed much better than conventional adsorbents in many
instances. For headspace analysis of volatiles from cacao powder and hops,
sampling was for 10 min at 51 ml/min with N2 as carrier gas and specimen
chromatograms are presented.
Chemical Substance(s):carboxylic acids ); hydrocarbons, polycyclic aromatic
); nitro-compounds, polycyclic aromatic ); air, )
End of record 2
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 Record 3 of 92 for NITRO AND PAH                           Go to record 4

1039809
Title:High-performance liquid chromatography of nitrated polycyclic
aromatic hydrocarbons.
Author:Cvacka, J. ; Barek, J. ; Fogg, A. G. ; Moreira, J. C. ; Zima, J.
Author Affiliation:UNESCO Lab. Environ. Electrochem., Dept. Anal. Chem.,
Charles Univ., 128 43 Prague, Czech Republic
Journal:Analyst (Cambridge, U. K.)   Vol123   Iss2   Pg9R-18R
Publication Date:Feb 1998
CODEN:ANALAO   ISSN:0003-2654
Language:English
Document Type:Journal
Abstract:A review is presented of HPLC methods for the determination of
nitro-PAH. The aspects considered include, sample preparation,
chromatographic systems (stationary and mobile phases) and detection
techniques (spectrophotometry, fluorescence, electrochemical,
chemiluminescence, MS). Some examples of the application of HPLC to
nitro-PAH determination in various matrices, e.g., air, vehicle exhausts,
biological materials and food, are presented (90 references).
Chemical Substance(s):nitro-compounds, polycyclic aromatic )
End of record 3
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 Record 4 of 92 for NITRO AND PAH                           Go to record 5

1041062
Title:Fractionation of nitro-and hydroxy-polynuclear aromatic hydrocarbons
from extracts of air particulates by supercritical-fluid chromatography.
Author:Medvedovici, A. V. ; David, F. ; Desmet, G. ; Sandra, P.
Author Affiliation:Dept. Org. Chem., Univ. Gent, 9000 Ghent, Belgium
Journal:J. Microcolumn Sep.   Vol10   Iss1   Pg89-97
Publication Date:1998
CODEN:JMSEEJ   ISSN:1040-7685
Language:English
Document Type:Journal
Abstract:Airborne particulates were collected on a Whatman Quartz
Microfibre filter (20.3 x 25.4 cm) by sampling air at a flow rate of 1132
l/min for 24 h. Nitro-and hydroxy-PAH were extracted from the particulates
by Soxhlet extraction with CHCl3 for 16 h and then fractionated on a 5
.mu.m silica column (25 cm x 4.6 mm i.d.) at 50.degree.C, with CO2 as
mobile phase (pressure 200 bar, 2 ml/min flow rate) modified with
methanol/acetonitrile (1:1) [modifier programme from 1% (held for 5 min) to
2.5% at 0.15%/min, then to 27.5% at 5%/min]. Standard PAH were used to
calibrate the collection windows. Fractions were analysed by GC-MS on a
fused-silica column (30 m x 0.25 mm i.d.) coated with HP-5MS (0.25 .mu.m)
and operated with temperature programming from 50.degree.C (held for 1 min)
to 320.degree.C (held for 2 min) at 10.degree.C/min, with He as carrier gas
(1 ml/min) and MS detection. For selected solutes, concentrations down to 1
pg/m3 could be measured.
Chemical Substance(s):hydrocarbons, polycyclic aromatic ); airborne
particulates, )
End of record 4
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 Record 5 of 92 for NITRO AND PAH                           Go to record 6

4003726
Title:Deadly diesel: new potential carcinogen discovered in Japan.
Journal:Chemistry in Britain   Vol33   Iss12   Pg10
Publication Date:Dec 1997
CODEN:CHMBAY   ISSN:0009-3106
Language:English
Document Type:Journal; word count 200-899
Abstract:Researchers in Japan have discovered what they suspect may be one
of the most potent carcinogens ever identified. The company,
3-nitrobenzanthrone, is found in diesel exhaust fumes. The new compound is
described as a new class of powerful direct mutagen that can induce
considerable structural and/or numerical chromosomal aberrations in
mammalian cells. The compound is a nitrated polycyclic aromatic hydrocarbon
(nitro-PAH). While the concentration of 3-nitrobenzanthrone in diesel
exhaust particles was small, the researchers reported that it would
contribute considerably to the total mutagenic activity of diesel exhaust
extracts.
Chemical Substance(s):carcinogens
End of record 5
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 Record 6 of 92 for NITRO AND PAH                           Go to record 7

1040764
Title:Nitroarene concentrations and direct-acting mutagenicity of diesel
exhaust particulates fractionated by silica-gel column chromatography.
Author:Hayakawa, K. ; Nakamura, A. ; Terai, N. ; Kizu, R. ; Ando, K.
Author Affiliation:Fac. Pharm. Sci., Kanazawa Univ., Kanazawa 920, Japan
Journal:Chem. Pharm. Bull.   Vol45   Iss11   Pg1820-1822
Publication Date:Nov 1997
CODEN:CPBTAL   ISSN:0009-2363
Language:English
Document Type:Journal
Abstract:Diesel exhaust particulates (DEP) were collected at 30 l/min on a
Millipore AP 20 glass-fibre filter positioned 30 cm from the end of the
exhaust pipe of an idling diesel car engine. The filters were changed every
15 min, dried in a desiccator for 2 days and the collected particulates
were extracted with 2 x 50 ml benzene/ethanol (3:1). The extracts were
combined, filtered and the filtrate was evaporated to dryness. The residue
was dissolved in 500 .mu.l n-hexane and applied to a Wakogel Q200 silica
gel column (12 cm x 20 mm i.d.). The column was eluted successively with
n-hexane (40 + 200 ml), n-hexane/CH2Cl2 (3:1, 200 ml) CH2Cl2 (200 ml) and
methanol (450 ml). The five fractions were evaporated to dryness and the
residues were dissolved in 4 ml acetonitrile. Portions (20 .mu.l) of each
reconstituted fraction solution were analysed by HPLC on two Nacalai Tesque
Cosmosil 5C18MS columns (25 cm x 4.6 mm i.d.) connected in series with
acetonitrile/imidazole-HClO4 pH 7.6 (1:1) as mobile phase (1 ml/min) and
chemiluminescence detection (details given). Results (listed) showed that
nitro-PAH were mainly concentrated in the CH2Cl2-only extract and they
contributed 53.1% to the mutagenic activity of the extract. The
concentration levels of 1-nitropyrene, 1,3-, 1,6-and 1,8-dinitropyrenes
were greater than the other nitro-PAH.
Chemical Substance(s):nitro-compounds, polycyclic aromatic ); exhaust
gases, diesel-engine, )
End of record 6
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 Record 7 of 92 for NITRO AND PAH                           Go to record 8

1038767
Title:Evidence for the adsorption of nitrated polycyclic aromatic
hydrocarbons by tree bark.
Author:Douce, D. S. ; Clench, M. R. ; Cooke, M. ; Wang, J. D.
Author Affiliation:Div. Chem./Environ. Res. Centre, School Sci., Sheffield
Hallam Univ., Sheffield S1 1WB, UK
Journal:J. Chromatogr., A   Vol786   Iss2   Pg275-283
Publication Date:31 Oct 1997
CODEN:JCRAEY   ISSN:0021-9673
Language:English
Document Type:Journal
Abstract:Bark was extracted with CH2Cl2 (80 ml) for 96 h, fractionated by
SPE on a polypropylene cartridge containing amino-bonded phase (200 mg
absorbent) and alumina (500 ng absorbent) in series. Each solvent (15 ml)
was passed through the cartridge in reverse order (polar to non-polar) and
the bark extract was added to the column with the least polar solvent
(hexane) then eluted by hexane, cyclohexane, 20% CH2Cl2 in cyclohexane,
CH2Cl2, acetonitrile and methanol. The fractions were reduced to 500 .mu.l,
reduced to dryness, internal standard (8-nitroquinaldine) was added and the
solution reconstituted with CH2Cl2 before analysis by GC-ECD and GC
-negative-ion (NI) CIMS with selected-ion monitoring. For GC-ECD the
extract was injected onto a fused-silica column (20 m x 0.32 mm i.d.)
coated with Rtx-5 (0.25 .mu.m) and operated with temperature programming
from 40.degree.C (held for 4 min) to 145.degree.C (held for 1 min) at
25.degree.C/min, to 280.degree.C (held for 15 min) at 5.degree.C/min, N2 as
carrier gas (1 ml/min) and 63Ni ECD. For GC-NI CIMS a 30 m or 60 m column
was used (other conditions as before) with He carrier gas (1 ml/min). The
nitro-PAH were detected in the 20% CH2Cl2 fraction with recoveries from 28%
(1-nitronapthalene) to 108% (1-nitropyrene) and RSD of 1.92% and 10.2%,
respectively. A comparison was made with nitro-PAH in diesel particulate
extracts.
Chemical Substance(s):nitro-compounds, polycyclic aromatic ); bark, )
End of record 7
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 Record 8 of 92 for NITRO AND PAH                           Go to record 9

1038994
Title:A study on the analysis of polycyclic aromatic hydrocarbons by
reversed-phase LC with diode-array detection. I.
Author:Lee, W. ; Hong, J.-E. ; Park, S.-J. ; Pyo, H. S.
Author Affiliation:Res. Inst. Basic Sci. and Dept. Chem., Kyunghee Univ.,
Seoul 130-701, South Korea
Journal:Anal. Sci. Technol.   Vol10   Iss5   Pg315-324
Publication Date:25 Oct 1997
CODEN:ASCTET   ISSN:1225-0163
Language:Korean
Document Type:Journal
Abstract:The retention behaviour of 16 PAH and four nitro-PAH was
investigated on a 5 .mu.m ODS Hypersil column (10 cm x 4.6 mm i.d.) at
40.degree.C with gradient elution (1 ml/min) using aqueous methanol or
aqueous acetonitrile (details given) and diode-array detection from 210-400
nm. Solutes with greater aqueous solubilities, length to breadth ratios and
numbers of interfering hydrogen atom pairs had greater retention times.
Detection limits of PAH were 100-500 ng/ml.
Chemical Substance(s):nitro-compounds, polycyclic aromatic, );
hydrocarbons, polycyclic aromatic, )
End of record 8
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 Record 9 of 92 for NITRO AND PAH                          Go to record 10

3046469
Title:Devil in the diesel.
Author:Pearce, F.
Journal:New Sci. New Scientist -UK Edition   Vol156   Iss2105   Pg4
Publication Date:25 Oct 1997
CODEN:NWSCAL   ISSN:0262-4079
Language:English
Document Type:Journal
Abstract:Japanese researchers report that 3-nitrobenzanthrone identified in
the exhaust fumes of diesel engines may be the most strongly carcinogenic
compound ever analysed. The compound scored the highest ever result in the
Ames test which is the standard measure of the cancer causing potential of
toxic chemicals. One of the researchers from Kyoto University suggests that
the recent increase in the number of lung cancer patients could be linked
with respirable carcinogens like 3-nitrobenzoanthrone. 3-Nitrobenzanthrone
is a nitrated polycyclic aromatic hydrocarbon (nitro-PAH). It is produced
during reactions between ketones -by-products of burning fuel -and airborne
nitrogen oxides that take place on the surface of hydrocarbon particles in
diesel exhaust.

Chemical Substance(s):diesel fuel ; 3-nitrobenzanthrone
End of record 9
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 Record 10 of 92 for NITRO AND PAH                         Go to record 11

1039708
Title:Supercritical-fluid extraction of mononitrated polycyclic aromatic
hydrocarbons from tea -- correlation with the PAH concentration.
Author:Schlemitz, S. ; Pfannhauser, W.
Author Affiliation:Inst. Bio-and Food Chem., Dept. Food Chem., Univ.
Technol., 8010 Graz, Austria
Journal:Z. Lebensm.-Unters. -Forsch. A   Vol205   Iss4   Pg305-310
Publication Date:Oct 1997
CODEN:ZLFAFA   ISSN:1431-4630
Language:English
Document Type:Journal
Abstract:SFE of nitro-PAH and PAH from tea was performed at 90.degree.C and
230 atm statically for 3 min using CO2, then 5% acetonitrile was added (3
ml/min) in a dynamic step (2 min). The pressure was increased to 260 atm in
a 5 min static step followed by a dynamic step (10 min) with a CO2 flow of
4 ml/min. The 5 min static and 10 min dynamic extractions were repeated and
the analytes were trapped using glass beads at -5.degree.C. The trap was
heated to 35.degree.C and analytes desorbed using 2 ml hexane. Further
clean up was achieved using SX3 biobeads and elution with cyclohexane/ethyl
acetate (1:1), followed by silica cartridge clean up with elution using
cyclohexane/dichloromethane (1:1). Extracts obtained by the above and
Soxhlet and ultrasonication were analysed by GC on a fused-silica column
(30 m x 0.25 mm i.d.) coated with HP5-MS (0.25 .mu.m). Nitro-PAH were
determined using temperature programming from 50.degree.C (held for 1 min)
to 150.degree.C at 25.degree.C/min then to 300.degree.C (held for 1 min) at
10.degree.C/min. PAH were determined using temperature programming from
50.degree.C (held for 1 min) to 300.degree.C (held for 10 min) at
10.degree.C/min. He was used as carrier gas (1.2 ml/min) and MS detection
was performed using selected-ion monitoring. Extraction yields were highest
using SFE (102-162% recovery relative to Soxhlet). Correlations between
Nitro-PAH and PAH concentrations in tea samples were investigated.
Chemical Substance(s):nitro-compounds, polycyclic aromatic ); hydrocarbons,
polycyclic aromatic ); tea, )
End of record 10
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 Record 11 of 92 for NITRO AND PAH                         Go to record 12

1038326
Title:Effects of parameter on supercritical-fluid extraction of
nitro-polynuclear aromatic hydrocarbons from sand.
Author:Barzegar, M. ; Daneshfar, A. ; Ashraf-Khorassani, M.
Author Affiliation:Dept. Chem., Tarbiat Modaress Univ., Tehran, Iran
Journal:Anal. Chim. Acta   Vol349   Iss1-3   Pg245-252
Publication Date:29 Aug 1997
CODEN:ACACAM   ISSN:0003-2670
Language:English
Document Type:Journal
Abstract:A 10 .mu.l portion each of four nitro-PAH
9-hydroxy-3-nitrofluorene, 1-nitropyrene, 9-nitroanthracene and
2,7-dinitrofluorene (20 .mu.g/l) in CH2Cl2 was injected into an empty 1 ml
extraction cell, optionally half full or full of sand; in a modifier study
the sand was spiked with 50, 100 or 200 .mu.l methanol or toluene.
Extractions were performed at 200, 250, 300 or 350 atm. Supercritical CO2
was discharged (0.2-0.3 ml/min) through a restrictor into 3 ml methanol in
a 5 ml flask, cooled in an ice bath. Extraction efficiencies, measured by
LC with a variable UV-visible detector, were improved by a reduction in the
extraction cell dead volume, the addition of a static extraction period and
extraction at 350 atm at constant temperature; an increase in temperature
to 100.degree.C at constant pressure had little effect. Methanol and
toluene modifiers improved the extraction of nitro-PAH from sand but
toluene was more effective for the extraction of nitro-PAH from diesel and
air particulates, which were shown to contain 1-nitropyrene.
Chemical Substance(s):nitro-compounds, polycyclic aromatic ); sand, )
End of record 11
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 Record 12 of 92 for NITRO AND PAH                         Go to record 13

1037545
Title:Determination of polycyclic aromatic compounds and heavy metals in
sludges from biological sewage treatment plants.
Author:Bodzek, D. ; Janoszka, B. ; Dobosz, C. ; Warzecha, L. ; Bodzek, M.
Author Affiliation:Dept. Chem., Fac. Med., Silesian Med. Acad., 41-808
Zabrze, Poland
Journal:J. Chromatogr., A   Vol774   Iss1-2   Pg177-192
Publication Date:11 Jul 1997
CODEN:JCRAEY   ISSN:0021-9673
Language:English
Document Type:Journal
Abstract:Identification of PAHs and their derivatives in sewage sludge was
studied and a schematic diagram was devised. Analytes were extracted from
sludge into DMF and portions of this extract were treated separately by SPE
on a 3 ml Bakerbond silica cartridge, by liquid-solid chromatography in a
glass column (20 x 1.5 cm i.d.) of silica (70 to 270 mesh) containing 10%
H2O, and by TLC on a layer (20 x 10 cm x 0.25 mm thick) of Merck silica
60F254 to fractionate PAHs. TLC on silica/kieselguhr with
dichloromethane/methanol as mobile phase was used to obtain an aza-arene
fraction and on alumina with dichloromethane/hexane/ethyl ether mobile
phase to obtain an amino-PAH fraction. Nitro-PAHs were collected by
liquid-solid chromatography on silicic acid with hexane/benzene as eluent
and were then derivatized to amides for analysis. Aza-arenes and amino-PAHs
were also obtained by liquid-solid chromatography on alumina with
CHCl3/ethanol as eluent, followed by class separation on silicic acid with
benzene and benzene/ethyl ether as selective eluents. Further analysis was
by GC-MS on a column (25 m x 0.25 mm i.d.) coated with 0.25 .mu.m of HP
ULtra-2 with He as carrier gas, a temperature programme from 60.degree.C to
280.degree.C or 300.degree.C (details given) and 70 eV EIMS for
identifications or GC-FID on a column (30 m x 0.32 mm i.d.) coated with 1
.mu.m of Supelco PTE-5 and programmed from 100.degree.C to 300.degree.C
with He as carrier gas for quantitation of PAH. Tabulated results are
presented for 32 PAH, eight nitro-PAH, eight amino-PAH and 12 aza-arenes.
Typical contents of nine metals in sewage plant sludges as determined by
AAS are also tabulated.
Chemical Substance(s):hydrocarbons, polycyclic aromatic ); aza-arenes );
waste solids, sewage sludge, )
End of record 12
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 Record 13 of 92 for NITRO AND PAH                         Go to record 14

1036739
Title:Polynuclear aromatic hydrocarbons (PAH), benz[a]pyrene (BaPY) and
nitrated-PAH (N-PAH) in suspended particulate matter. (Proposal for
revision of the Italian Reference Method).
Author:Cecinato, A.
Author Affiliation:Ist. sull'Inquinamento Atmosferico-CNR, 00016
Monterotondo Scalo, Rome, Italy
Journal:Ann. Chim. (Rome)   Vol87   Iss7-8   Pg483-496
Publication Date:Jul-Aug 1997
CODEN:ANCRAI   ISSN:0003-4592
Language:English
Document Type:Journal
Abstract:PAH and nitro-PAH were determined in suspended particulate matter
by soot collection on a filter, solvent extraction and partition,
fractionation by HPLC, separation by GC and identification and quantitation
by GC-MS. Extraction was performed with acetone and CH2Cl2 and solvent
partition with hexane/DMSO. The aliphatic fraction was then directly
analysed by GC-MS. The aromatic fraction was further separated by HPLC on a
normal-phase column with hexane to CH2Cl2 polar solvents and detection at
280 nm. The separation of PAH from other non-polar polyaromatics was
performed on a DB-5 column. Nitro-PAH separation was performed on DB-1701
or DB-17 columns. Mass detection was performed at 70 eV and selected-ion
monitoring was used to identify the characteristic ions. The methodology
was suitable for measuring PAH and nitro-PAH concentrations in air from
0.02-20 ng/m3.
Chemical Substance(s):hydrocarbons, polycyclic aromatic ); nitro-compounds,
polycyclic aromatic ); airborne particulates, )
End of record 13
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 Record 14 of 92 for NITRO AND PAH                         Go to record 15

1038179
Title:Negative-ion laser desorption ionization time-of-flight mass
spectrometry of nitrated polycyclic aromatic hydrocarbons.
Author:Bezabeh, D. Z. ; Allen, T. M. ; McCauley, E. M. ; Kelly, A. D.
Author Affiliation:Dept. Chem., Univ. California, Davis, CA 95616, USA
Journal:J. Am. Soc. Mass Spectrom.   Vol8   Iss6   Pg630-636
Publication Date:Jun 1997
CODEN:JAMSEF   ISSN:1044-0305
Language:English
Document Type:Journal
Abstract:Selective detection of several nitro-PAH by laser desorption TOF
MS operated in negative-ion mode is described. Mass spectra were recorded
with use of a custom-built TOF mass spectrometer operated in the linear
mode. A Nd:YAG laser with a 8 ns pulse was used to effect desorption and
ionization of the sample at 266 and 213 nm, respectively. The potentials
applied were -4.5 kV repellor; -1.5 kV extractor; and 0 kV accelerator and
drift tube. The negative ions produced from each laser pulse were
accelerated down the flight tube and recorded with a dual microchannel
plate detector operating at 2 kV. The resulting current was recorded. The
lowest concentration of nitro-PAH detected for 1-nitropyrene and
2-nitrofluorene was 100 ppb. Intense molecular anions were observed in
addition to the usual nitro-PAh identifiers of cyanide and nitrite. The
method was applied to the detection of nitro-PAH in a diesel particulate
sample.
Chemical Substance(s):nitro-compounds, polycyclic aromatic ); exhaust
gases, diesel-engine, ); airborne particulates, )
End of record 14
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 Record 15 of 92 for NITRO AND PAH                         Go to record 16

1035362
Title:Sub-parts-per-billion determination of nitro-substituted polynuclear
aromatic hydrocarbons in airborne particulate matter and soil by
electron-capture tandem mass spectrometry.
Author:Vincenti, M. ; Minero, C. ; Pelizzetti, E. ; Fontana, M. ; De Maria,
R.
Author Affiliation:Dipt. Chim. Anal., Univ. Torino, 10125 Turin, Italy
Journal:J. Am. Soc. Mass Spectrom.   Vol7   Iss12   Pg1255-1265
Publication Date:Dec 1996
CODEN:JAMSEF   ISSN:1044-0305
Language:English
Document Type:Journal
Abstract:Soil was Soxhlet-extracted with toluene/methanol (1:1), and the
extract was cleaned up on a silica gel column with elution with 50 ml of
toluene. Exposed air filters were extracted with 50 ml of toluene. Either
extract was evaporated to 1 ml and analysed by GC-MS-MS; after separation
on a DB-5-MS column, the nitro-PAH were detected as M- by the first system
and as NO2- (m/z 46) by the second. Detection limits in air were 5-15
pg/m3, and calibration graphs were linear over three decades.
Chemical Substance(s):nitro-compounds, polycyclic aromatic ); airborne
particulates, ); soil, )
End of record 15
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 Record 16 of 92 for NITRO AND PAH                         Go to record 17

1034169
Title:Shpol'skii spectroscopy as a tool in environmental analysis for
amino- and nitro- substituted polycyclic aromatic hydrocarbons: a critical
evaluation.
Author:Kozin, I. S. ; Gooijer, C. ; Velthorst, N. H.
Author Affiliation:Dept. General and Anal. Chem., Free Univ., 1081 HV
Amsterdam, Netherlands
Journal:Anal. Chim. Acta   Vol333   Iss3   Pg193-204
Publication Date:8 Nov 1996
CODEN:ACACAM   ISSN:0003-2670
Language:English
Document Type:Journal
Abstract:Amino-PAH having 2-5 rings were studied in n-alkanes by
room-temperature fluorimetry and low-temperature Shpol'skii spectrometry.
The vibrationally resolved cryogenic fluorescence and phosphorescence
spectra of several amino-substituted naphthalenes, anthracenes and
fluorenes are reported, together with the spectra of four- and
five-membered ring amino-PAH. The photostability of the amino-PAH and the
effect of solidification rate on spectral quality are discussed. Nitro-PAH
were determined by reduction with Zn powder to convert them to the
corresponding aromatic amines before Shpol'skii luminescence detection. The
technique was optimized using a mixture of standard reference materials
containing parent and nitro-PAH. The method was applied to the
determination of 1-nitropyrene in a diesel particulate reference material
(SRM 1650). The analyte was extracted with solvent and separated by
normal-phase LC prior to reduction and fluorimetry. The results agreed with
the certified values and those obtained by chromatographic methods.
Chemical Substance(s):hydrocarbons, polycyclic aromatic, amino- );
nitro-compounds, polycyclic aromatic ); environmental materials, ( )
End of record 16
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 Record 17 of 92 for NITRO AND PAH                         Go to record 18

1035168
Title:Analysis of nitro-PAH in food matrices by online reduction and
high-performance liquid chromatography.
Author:Schlemitz, S. ; Pfannhauser, W.
Author Affiliation:Inst. Bio-and Food Chem., Graz Univ. Technol., 8010
Graz, Austria
Journal:Food Addit. Contam.   Vol13   Iss8   Pg969-977
Publication Date:Nov-Dec 1996
CODEN:FACOEB   ISSN:0265-203X
Language:English
Document Type:Journal
Abstract:Food (10-20 g) was homogenized and Soxhlet-extracted with
acetonitrile or subjected to ultrasonic extraction with aqueous
acetonitrile. The extracts were cleaned up by SEC on a biobeads SX-3 column
using cyclohexane/ethylacetate (1:1), then analysed by GC-MS (details
given) or by HPLC. For HPLC, sample was passed through a column (5 cm x 4
mm i.d.) packed with 5 .mu.m alumina coated with Pt and Rh (preparation
described) for online reduction of nitro-PAH at 80.degree.C, prior to
separation on a 5 .mu.m LiChrospher 60 RP-Select B column (25 cm x 4 mm
i.d.) with aqueous 65% methanol as mobile phase (0.9 ml/min) and
fluorescence detection (wavelengths given). Detection limits were 0.5-150
pg. Calibration graphs were linear for 0.5-500 pg. The RSD (n = 10) for 50
pg 1-nitropyrene was 1.7%. Recoveries were ~80%.
Chemical Substance(s):nitro-compounds, polycyclic aromatic ); foods, )
End of record 17
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 Record 18 of 92 for NITRO AND PAH                         Go to record 19

1033823
Title:Supercritical-fluid chromatography with electrochemical detection of
phenols and polyaromatic hydrocarbons.
Author:Dressman, S. F. ; Simeone, A. M. ; Michael, A. C.
Author Affiliation:Dept. Chem., Univ. Pittsburgh, Pittsburgh, PA 15260
Journal:Anal. Chem.   Vol68   Iss18   Pg3121-3127
Publication Date:15 Sep 1996
CODEN:ANCHAM   ISSN:0003-2700
Language:English
Document Type:Journal
Abstract:Mixtures of 11 priority phenols and 13 PAH were separated by SFC
on a packed diol column at 60.degree.C with neat and methanol-modified CO2
mobile phases. The self-contained online electrochemical detector comprised
a Pt disc working electrode inside a Pt tube counter electrode, which were
both coated with a thin poly(ethylene oxide) film containing lithium
triflate. The detector was operated at -1.5 to +2 V or at 0-2 V, which
allowed the detection of oxidizable and reducible components of the
mixtures. Detection limits were in the low ng range with a linear response
over two decades of amount injected. Overlapping elution profiles of
chloro-, methyl- and nitro-phenols could be resolved by using the
differences between their half-wave potentials. Addition of 1% methanol to
CO2 decreased the total analysis time of phenols from 50 to 20 min compared
with unmodified CO2.
Chemical Substance(s):phenols ); hydrocarbons, polycyclic aromatic )
End of record 18
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 Record 19 of 92 for NITRO AND PAH                         Go to record 20

1033439
Title:Laser desorption/ionization time-of-flight mass spectrometry of
nitrated polycyclic aromatic hydrocarbons.
Author:Dotter, R. N. ; Smith, C. H. ; Young, M. K. ; Kelly, P. B. ; Jones,
A. D. ; McCauley, E. M. ; Chang, D. P. Y.
Author Affiliation:Dept. Chem., Facility Advanced Instrumentation, Univ.
California, Davis, CA 95616, USA
Journal:Anal. Chem.   Vol68   Iss14   Pg2319-2324
Publication Date:15 Jul 1996
CODEN:ANCHAM   ISSN:0003-2700
Language:English
Document Type:Journal
Abstract:A 20-30 .mu.l sample of a nitro-PAH (listed) in CH2Cl2 (5-10
mg/ml) was deposited on the flattened Al probe tip (~2 cm2), positioned
perpendicular to the flight tube axis of a TOF mass spectrometer operated
in linear mode. Photons at 213 nm were generated from the sum mixing of a
Nd:YAG laser fundamental at 1064 nm and the fourth harmonic at 266 nm in a
.beta.-barium borate crystal. A plume that contained neutrals, ions and
electrons, was generated by interaction of a laser pulse (5-20 .mu.J) with
the sample. Positive ions, accelerated into the flight tube were detected
by a dual microchannel plate detector. The relative density of the positive
molecular ion observed for each nitro-PAH was greater with 213 nm radiation
than with 266 nm radiation. A strong [M - NO]+ peak was observed in all
spectra, accompanied by a weak NO+ with 266 nm radiation which intensified
with 213 nm radiation.
Chemical Substance(s):nitro-compounds, polycyclic aromatic, )
End of record 19
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 Record 20 of 92 for NITRO AND PAH                         Go to record 21

1031741
Title:Liquid-chromatographic determination of nitro-substituted polynuclear
aromatic hydrocarbons by sequential electrochemical and fluorescence
detection.
Author:Murayama, M. ; Dasgupta, P. K.
Author Affiliation:Dept. Chem. and Biochem., Texas Tech Univ., Lubbock, TX
79409-1061, USA
Journal:Anal. Chem.   Vol68   Iss7   Pg1226-1232
Publication Date:1 Apr 1996
CODEN:ANCHAM   ISSN:0003-2700
Language:English
Document Type:Journal
Abstract:Methanol/1mM-H2SO4 (17:3) mobile phase of pH 2.8 was pumped at 0.5
ml/min through a pulse dampener PRP-1 column and a guard cell for O2
removal before injection of nitro-PAH analytes. Analysis was carried out on
a 3 .mu.m Spherisorb ODS II reversed-phase column (15 cm x 6 mm i.d.)
equipped with a guard column (2 cm x 6 mm i.d.) of the same material, with
coulometric detection in the reductive mode at a cathodic potential of <=2
V followed by fluorescence detection of the amines at 380-485 nm
(excitation at 260-285 nm). The detection limits were in the range 0.75-4.5
pmol and the peak height RSD were 1.27-5.3% at 300 pmol injected (n = 8).
The method was applied to diesel engine exhaust samples.
Chemical Substance(s):nitro-compounds, polycyclic aromatic ); exhaust
gases, diesel-engine, )
End of record 20
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 Record 21 of 92 for NITRO AND PAH                         Go to record 22

1032105
Title:Water analysis by online solid-phase extraction - gas
chromatography-mass spectrometry.
Author:Jahr, D. ; Vreuls, J. J. ; Louter, A. J. H. ; Loebel, W.
Author Affiliation:Landesuntersuchungsamt Gesundheitswesen Suedbayern,
85764 Oberschleissheim, Germany
Journal:GIT Fachz. Lab.   Vol40   Iss3   Pg178, 180-183
Publication Date:Mar 1996
CODEN:GITEAR   ISSN:0016-3538
Language:German
Document Type:Journal
Abstract:Details are given of an automated system, based on the Autoselect
2000 (Interchro, Bad Kreuznach, Germany), in which water samples were
pumped through a PLRP-S column conditioned with ethyl acetate and H2O, the
column was dried by passage of N2 and a microprocessor-controlled loop
interface (Autoloop 2000, Interchro) was used to elute the adsorbed
compounds with ethyl acetate for GC-MS analysis. The GC system comprised a
5 m retention gap, a 3 m retaining precolumn and a separating column. The
system was applied to the determination of pesticides, PAH, mineral oil,
and aromatic amines and nitro-compounds leached from explosives. Analyses
were also carried out with semiautomated concentration in a system of two
six-port valves and two HPLC pumps controlled by a switching system (Must
Sytem, Spark Holland, Emmen, Netherlands). Detection limits in the ng/l or
low .mu.g/l range were attained. Advantages and drawbacks of the systems
are outlined.
Chemical Substance(s):pesticides ); aromatic compounds ); petroleum );
hydrocarbons, polycyclic aromatic ); waters, natural, )
End of record 21
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 Record 22 of 92 for NITRO AND PAH                         Go to record 23

1033053
Title:Characterization of nitro-PAH adsorbed on environmental
micro-particles: a comparison of LAMMA, Fourier-transform mass spectrometry
laser microprobe analysis and gas chromatography-tandem mass spectrometry.
Author:Hachimi, A. ; Krier, G. ; Poitevin, E. ; Schweigert, M. C. ; Peter,
S. ; Muller, J. F.
Author Affiliation:Lab. Spectrometrie Masse et Chim. Laser, I.P.C.
Technopole Metz 2000, 57078 Metz 3, France
Journal:Int. J. Environ. Anal. Chem.   Vol62   Iss3   Pg219-230
Publication Date:1996
CODEN:IJEAA3   ISSN:0306-7319
Language:English
Document Type:Journal
Abstract:A methodology for characterizing nitro-PAH adsorbed onto
environmental matrices is presented based on the direct analysis by laser
microprobe MS techniques and the indirect analysis by GC-tandem MS.
Micro-particles were collected from industrial fumes using an impactor
device fitted with nine aluminium filters (0.4-9 .mu.m). Particles were
removed from the filters for analysis by laser microprobe mass analysis
(LAMMA)-TOF-MS and laser microprobe FTICR MS. In both methods desorption
and ionization was effected by laser irradiation at short wavelength (193
or 222 nm) and low power (~=6 x 106 W/cm2). Nitrated compounds were
characterized by [M - NO]- ions (m/z = 193, 217 and 352) and the
corresponding M- ions (m/z = 223, 247 and 382). The associated low mass
negative-ions CN, CNO, NO2 and CNO2 were detected by LAMMA-TOF-MS but not
by FTMS. Methylene chloride extracts of the particulate matter were
subjected to analysis by GC-tandem negative-ion CIMS mode with the first
quadrupole set to transmit the molecular ion [M]0. These molecular ions
were fragmented by collision with Ar and two product ions, [M - NO]-1 and
[NO2]- were monitored with the third quadrupole. This technique allowed the
detection of five nitro-PAH (listed).
Chemical Substance(s):nitro-compounds, polycyclic aromatic ); environmental
materials, )
End of record 22
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 Record 23 of 92 for NITRO AND PAH                         Go to record 24

1030762
Title:Device for efficient solvent collection of environmentally relevant
compounds in offline SFE.
Author:Wenclawiak, B. W. ; Heemken, O. P. ; Sterzenbach, D. ; Schipke, J. ;
Theobald, N. ; Weigelt, V.
Author Affiliation:Anal. Chem. I, Univ.-GH Siegen, 57068 Siegen, Germany
Journal:Anal. Chem.   Vol67   Iss24   Pg4577-4580
Publication Date:15 Dec 1995
CODEN:ANCHAM   ISSN:0003-2700
Language:English
Document Type:Journal
Abstract:Analyte losses in SFE were reduced using a trapping device
obtained by placing a Dewar condenser on top of the collection vial. High
recoveries were achieved for alkanes, PAH, nitro-PAH, fatty acid esters and
chlorinated hydrocarbons. Collection losses were reduced to ~2% with the
condenser at -25.degree.C.
Chemical Substance(s):alkanes ); hydrocarbons, polycyclic aromatic );
hydrocarbons, polycyclic aromatic, nitro- ); fatty acid esters );
hydrocarbons, chloro- ); environmental materials, )
End of record 23
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 Record 24 of 92 for NITRO AND PAH                         Go to record 25

1029984
Title:Applicability of low temperature high-resolution fluorescence
spectroscopy to the analysis of nitro and amino polycyclic aromatic
hydrocarbons.
Author:Matsuzawa, S.; Garrigues, P.; Budzinski, H.; Bellocq, J.; Shimizu,
Y.
Author Affiliation:Natl. Inst. Resources and Environ., Tsukuba, Ibaraki
305, Japan
Journal:Anal. Chim. Acta   Vol312   Iss2   Pg165-177
Publication Date:30 Aug 1995
CODEN:ACACAM   ISSN:0003-2670
Language:English
Document Type:Journal
Abstract:A sample (.apprx.e;100 mg) was dissolved in 6 ml
methanol/H2O/0.05% aqueous CuCl2 (10:1:1). The reaction vessel was wrapped
in Al foil to prevent photolysis, then 0.05 g KBH4 was carefully added.
After 1 h the reaction products were extracted with 12 ml CH2Cl2. The
organic extract was evaporated to dryness under N2 and the residue was
dissolved in hexane, heptane, pentane or octane. The resulting solution was
transferred to a quartz measurement cell. The cell was immersed in liquid N
for .apprx.e;30 s, then cooled to 15 K (2 K/min); a Jasco SS-50CS
fluorescence detector was used with a 1800 1/mm grating and a 0.08 nm
bandwidth. Fourteen of the 22 nitro PAH tested produced a high-resolution
fluorescence spectrum.
Chemical Substance(s):hydrocarbons, polycyclic aromatic
End of record 24
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 Record 25 of 92 for NITRO AND PAH                         Go to record 26

1030022
Title:Pentafluorobenzyl derivatives for the gas-chromatographic
determination of hydroxy-polycyclic aromatic hydrocarbons in urban
aerosols.
Author:Galceran, M. T.; Moyano, E.; Poza, J. M.
Author Affiliation:Dept. Anal. Chem., Univ. Barcelona, 08028 Barcelona,
Spain
Journal:J. Chromatogr., A   Vol710   Iss1   Pg139-147
Publication Date:25 Aug 1995
CODEN:JCRAEY   ISSN:0021-9673
Language:English
Document Type:Journal
Abstract:Airborne particulate matter was collected on Whatman EPM-2000
glass fibre filter papers (20.3 .times. 25.4 cm) using a Sierra Misco Model
650 gas sampler. The filters were extracted ultrasonically using
dichloromethane and then methanol (30 min periods at 30.degree.C), the
combined extracts dried over anhydrous Na2SO4, evaporated to dryness and
reconstituted with hexane. After transfer to alumina and silica SPE
cartridges in series, the hydroxy-PAH were eluted with methanol. The
methanol fraction was evaporated to dryness, dissolved in acetone and
derivatized with 10% pentafluorobenzyl bromide in acetone, 18-crown-6 in
acetone and K2CO3 for 1 h at 25.degree.C. After clean up by SPE on silica
cartridges with hexane elution the pentafluorobenzyl ethers were analysed
by GC on a fused-silica column (30 m .times. 0.25 mm i.d.) coated with
DB-17 (0.25 .mu.m) with temperature programming from 100.degree.C (held for
1 min) to 280.degree.C (held for 20 min) at 6.degree.C/min or from
100.degree.C (held for 2 min) to 125.degree.C (held for 1 min) at
25.degree.C/min to 240.degree.C (held for 1 min) at 30.degree.C/min then to
300.degree.C (held for 20 min) at 30.degree.C/min with He as carrier gas
(30 cm/sec) and ECD or methane negative ion CIMS detection. Detection
limits were 0.01-3.3 pg for ECD and the concentrations of 5-hydroxyindol,
2-nitro-1-naphthol, 2-hydroxy-1,4-naphthoquinone and 2-hydroxy-9-fluroenone
in air were 5-189 pg/m3.
Chemical Substance(s):hydrocarbons, polycyclic aromatic; air
End of record 25
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 Record 26 of 92 for NITRO AND PAH                         Go to record 27

1029521
Title:Identification of polycyclic aromatic compounds in urban air
particulate extracts by online coupled LC-GC-ITD-MS.
Author:Lewis, A. C.; Askey, S. A.; Robinson, R. E.; Bartle, K. D.; Pilling,
M. J.
Author Affiliation:School Chem., Univ. Leeds, Leeds LS2 9JT, UK
Journal:Anal. Proc.   Vol32   Iss8   Pg297-300
Publication Date:Aug 1995
CODEN:ANPRDI   ISSN:0144-557X
Language:English
Document Type:j
Abstract:Urban air particulates were collected with a high volume air
sampler at 0.4 m3 through a quartz microfibre filter by the method of Lewis
et al. (Atmos. Environ. 1995, in press). The filter was extracted at
110.degree.C with CO2 and 10% toluene at 400 atm for 90 min (details
given). The extracts were collected in 3 ml CH2Cl2 and excess solvent was
evaporated to dryness. The residue was dissolved in 2 ml hexane and 20
.mu.l portions of the solution were applied to a 5 .mu.m Spherisorb LC
column (10 cm .times. 2 mm i.d.) with gradient elution (100 and 250
.mu.l/min) with CH2Cl2/pentane (programme details given) and detection at
254 nm. The eluent from the detector was transferred via a pneumatically
actuated switch valve to a fused-silica column (25 m .times. 0.32 mm i.d.)
coated with BPX-5 (0.33 .mu.m) equipped with a 4 m precolumn of the same
material operating with temperature programming (details given) with He as
carrier gas (no flow given) and ion-trap EIMS detection. Alkylated and
nitro-PAH as well as oxygenated PAH and N heterocyclic PAH (tabulated) were
identified by their GC retention times and mass spectra from a comparison
with those of library standards.
Chemical Substance(s):hydrocarbons, polycyclic aromatic; airborne
particulates
End of record 26
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 Record 27 of 92 for NITRO AND PAH                         Go to record 28

1030062
Title:The ubiquitous occurrence of nitro-PAH of photochemical origin in
airborne particles.
Author:Ciccioli, P.; Cecinato, A.; Brancaleoni, E.; Frattoni, M.; Zacchei,
P.; Vasconcellos, P. de C.
Author Affiliation:Ist. Inquinamento Atmosferico, Area Ricerca Roma, C. N.
R., 00016 Monterotondo Scalo, Italy
Conference Information:Presented at the symposium "Spread of Toxic
Substances and Environmetal Pollution" held in Venice, Italy, 9-12 Apr 1994
Journal:Ann. Chim. (Rome)   Vol85   Iss7-8   Pg455-469
Publication Date:Jul-Aug 1995
CODEN:ANCRAI   ISSN:0003-4592
Language:English
Document Type:Journal
Abstract:Nitro-PAH can be formed in daylight anywhere in the troposphere
that sufficient amounts of NO2 and parent PAH are available. A diagram of
the analytical scheme is presented; it involves liquid-liquid partitioning
and HPLC fractionation and the determination of aliphatic compounds and
oxygenated PAH by GC with FID and of PAH and nitro-PAH by GC-MS.
Chemical Substance(s):hydrocarbons, polycyclic aromatic, nitro-; air
End of record 27
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 Record 28 of 92 for NITRO AND PAH                         Go to record 29

1028646
Title:Immunochemical detection of metabolites of parent and nitro
polycyclic aromatic hydrocarbons in urine samples from persons
occupationally exposed to diesel exhaust.
Author:Scheepers, P. T. J.; Fijneman, P. H. S.; Beenakkers, M. F. M.; de
Lepper, A. J. G. M.; Thuis, H. J. T. M.; Stevens, D.; van Rooij, J. G. M.;
Noordhoek, J.; Bos, R. P.
Author Affiliation:Toxicology Dept., Univ. Nijmegen, 6500 Nijmegen,
Netherlands
Journal:Fresenius' J. Anal. Chem.   Vol351   Iss7   Pg660-669
Publication Date:Apr 1995
CODEN:FJACES   ISSN:0937-0633
Language:English
Document Type:Journal
Abstract:Urine was centrifuged at 600 g for 5 min and the supernatant was
applied to a Sep-Pak C18 SPE cartridge. The cartridge was washed with
aqueous 60% methanol and elution was effected with 100% methanol. The
eluate was dried under N2 at 40.degree.C and the residue dissolved in
methanol. A microtitre plate was coated with 6-amino-benzo(a)pyrene/BSA by
overnight incubation at 4.degree.C. PBS/newborn calf serum/Tween 20 was
added to each well and the plate was incubated at 37.degree.C for 1 h.
After drying, the prepared urine and 4D5 antibody were added and incubated
at 37.degree.C for 1.5 h. The plates were washed, a second antibody 1 g
G-AP was added, the plates were incubated at 37.degree.C for 1-5 h, washed
and rinsed with filtered substrate buffer of 1M-diethanolamine/0.7mM-MgCl2
of pH 8.6. Nitrophenyl-phosphate disodium (0.3M) in substrate buffer was
added, the plates were incubated at 37.degree.C for 0.5 h and the
absorbance was measured at 405 nm. The sensitivity of the 50% inhibition
level was 1 .mu.g/l 1-aminopyrene with a RSD of 21%. The method was used to
detect PAH and nitro-PAH metabolites in the urine of creosote and railway
workers. Results are discussed.
Chemical Substance(s):hydrocarbons, polycyclic aromatic; hydrocarbons,
polycyclic aromatic, nitro-; urine
End of record 28
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 Record 29 of 92 for NITRO AND PAH                         Go to record 30

1028351
Title:Analytical multimethod for the determination of low volatile organic
pollutants in sediments and sewage sludges.
Author:Kolb, M.; Bohm, H. B.; Bahadir, M.
Author Affiliation:Inst. Ecol. Chem. and Waste Anal., Tech. Univ.
Braunschweig, 38106 Braunschweig, Germany
Journal:Fresenius' J. Anal. Chem.   Vol351   Iss2-3   Pg286-296
Publication Date:Jan-Feb 1995
CODEN:FJACES   ISSN:0937-0633
Language:English
Document Type:Journal
Abstract:Sediments and sewage sludges were extracted at natural pH, pH 2
and pH 12 (details given). After concentration, the extracts were dissolved
in cyclohexane/ethyl acetate and fractionated by GPC on Bio-Beads S-X8
(details given). The eluate was concentrated, the residue dissolved in
hexane and cleaned up by column chromatography on an alumina column
(details given). Elution with hexane gave a nonpolar fraction and elution
with ethyl acetate and methanol/ammonia (99:1) gave a polar fraction. The
nonpolar fraction was further fractionated by silica gel chromatography
with elution with hexane to give chlorohydrocarbons, with hexane/ethyl
acetate (49:1) to give PAH and ethyl acetate or CH2Cl2 to give anilines.
The eluates were concentrated and spiked with
1,2,3,4-tetrachloronaphthalene and 1-nitro-2,4,6-tri-t-butylbenzene
(aniline fraction only) as internal standards. S was removed from the first
fraction by the method of Jensen et al. and aliphatic hydrocarbons by
silica gel clean up (details given). The polar fraction was derivatized and
cleaned up on silica gel with elution with hexane/ethyl acetate (49:1),
(24:1) giving phenols and (4:1) for phthalates (details given). The
fractions were analysed by GC on a fused-silica column (30 m .times. 0.25
mm i.d.) coated with DB-5 (0.25 .mu.m) with temperature programming
(details given), He as carrier gas (1 ml/min) and ECD or MS detection
(details given). Results are discussed.
Chemical Substance(s):pollutants; organic compounds, volatile;
hydrocarbons, chloro-; hydrocarbons, polycyclic aromatic; aniline
derivatives; phenols; phthalic acid esters; sediments; waste solids, sewage
sludge
End of record 29
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 Record 30 of 92 for NITRO AND PAH                         Go to record 31

1028396
Title:Negative chemical ionization eliminates matrix effects.
Author:Ardrey, R. E.; Bukowski, N.; Gummersbach, J.
Author Affiliation:Univ. Huddersfield, Huddersfield, UK
Journal:LaborPraxis   Vol18   Iss11   Pg92-94
Publication Date:Nov 1994
CODEN:LAPRDE   ISSN:0344-1733
Language:German
Document Type:Journal
Abstract:The effect of negative CI was demonstrated on a sewage sludge
contaminated with PCB. The sample was extrac