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Statements

Subject Item
n2:RIV%2F00216208%3A11310%2F14%3A10281138%21RIV15-MSM-11310___
rdf:type
n11:Vysledek skos:Concept
rdfs:seeAlso
http://dx.doi.org/10.1080/03067319.2014.900677
dcterms:description
Chlorobenzoic acids (CBAs) are the major metabolite of aerobic bacterial degradation of polychlorinated biphenyls (PCBs). A rapid and simple simultaneous derivatisation method has been developed for gas chromatography-mass spectrometry determination in historically PCB-contaminated soils for 15 isomers of mono-, di-, tri-, tetra-, and pentachlorobenzoic acids in CBA mixtures. Two derivatisation agents (diazomethane and methyl chloroformate) and various conditions were evaluated (temperature, time, solvents, catalysts) in terms of efficiency. The optimised derivatisation method with diazomethane and 1% methanol running 1 hour at 5 degrees C was used for derivatisation of extracts of soils and river sediment from historically PCB-contaminated sites; the extracts were prepared using accelerated solvent extraction by a previously described method. Methylated CBAs were separated by gas chromatography using a system with two different common columns, DB-5 and DB-200, in series-coupled (tandem) arrangement and detected by EI-MS. A clean-up with a gel permeation chromatography was carried out to remove soil interfering matrix compounds as well as major portion of PCBs. The limits of quantification ranged between 1 and 10ngg(-1) of individual CBA in the soil. The procedure was applied to various soil samples from Lhenice (Czech Republic) highly contaminated with PCBs. CBAs were found in all tested soils and also in the river sediment. The most contaminated soil contained all CBAs representatives under the study with a total concentration of 3.1 mu gg(-1) of dry soil. Chlorobenzoic acids (CBAs) are the major metabolite of aerobic bacterial degradation of polychlorinated biphenyls (PCBs). A rapid and simple simultaneous derivatisation method has been developed for gas chromatography-mass spectrometry determination in historically PCB-contaminated soils for 15 isomers of mono-, di-, tri-, tetra-, and pentachlorobenzoic acids in CBA mixtures. Two derivatisation agents (diazomethane and methyl chloroformate) and various conditions were evaluated (temperature, time, solvents, catalysts) in terms of efficiency. The optimised derivatisation method with diazomethane and 1% methanol running 1 hour at 5 degrees C was used for derivatisation of extracts of soils and river sediment from historically PCB-contaminated sites; the extracts were prepared using accelerated solvent extraction by a previously described method. Methylated CBAs were separated by gas chromatography using a system with two different common columns, DB-5 and DB-200, in series-coupled (tandem) arrangement and detected by EI-MS. A clean-up with a gel permeation chromatography was carried out to remove soil interfering matrix compounds as well as major portion of PCBs. The limits of quantification ranged between 1 and 10ngg(-1) of individual CBA in the soil. The procedure was applied to various soil samples from Lhenice (Czech Republic) highly contaminated with PCBs. CBAs were found in all tested soils and also in the river sediment. The most contaminated soil contained all CBAs representatives under the study with a total concentration of 3.1 mu gg(-1) of dry soil.
dcterms:title
Sensitive GC/MS determination of 15 isomers of chlorobenzoic acids in accelerated solvent extracts of soils historically contaminated with PCBs and validation of the entire method Sensitive GC/MS determination of 15 isomers of chlorobenzoic acids in accelerated solvent extracts of soils historically contaminated with PCBs and validation of the entire method
skos:prefLabel
Sensitive GC/MS determination of 15 isomers of chlorobenzoic acids in accelerated solvent extracts of soils historically contaminated with PCBs and validation of the entire method Sensitive GC/MS determination of 15 isomers of chlorobenzoic acids in accelerated solvent extracts of soils historically contaminated with PCBs and validation of the entire method
skos:notation
RIV/00216208:11310/14:10281138!RIV15-MSM-11310___
n3:aktivita
n20:S n20:P n20:I
n3:aktivity
I, P(TE01020218), S
n3:cisloPeriodika
8
n3:dodaniDat
n9:2015
n3:domaciTvurceVysledku
n6:3861597 n6:8070016 Stella, Tatiana
n3:druhVysledku
n19:J
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n5:predkladatel
n3:idSjednocenehoVysledku
44447
n3:idVysledku
RIV/00216208:11310/14:10281138
n3:jazykVysledku
n8:eng
n3:klicovaSlova
polychlorinated biphenyls; derivatisation; chlorobenzoate; gas chromatography; soil extraction; chlorobenzoic acids
n3:klicoveSlovo
n4:soil%20extraction n4:derivatisation n4:gas%20chromatography n4:chlorobenzoic%20acids n4:polychlorinated%20biphenyls n4:chlorobenzoate
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[E0A79BC58A70]
n3:nazevZdroje
International Journal of Environmental Analytical Chemistry
n3:obor
n12:CB
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
6
n3:projekt
n16:TE01020218
n3:rokUplatneniVysledku
n9:2014
n3:svazekPeriodika
94
n3:tvurceVysledku
Cajthaml, Tomáš Medkova, Jaroslava Stella, Tatiana Čvančarová, Monika Křesinová, Zdena Hostacna, Lucie
n3:wos
000335846700009
s:issn
0306-7319
s:numberOfPages
15
n13:doi
10.1080/03067319.2014.900677
n17:organizacniJednotka
11310