| Simultaneous determination of methyl tert-butyl ether, its degradation products and other gasoline additives in soil samples by closed-system purge-and-trap gas chromatography-mass spectrometry. | |
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MedLine Citation:
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PMID: 16904119 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A new protocol for the simultaneous determination of methyl tert-butyl ether (MTBE); its main degradation products: tert-butyl alcohol (TBA) and tert-butyl formate (TBF); other gasoline additives, oxygenate dialkyl ethers: ethyl tert-butyl ether (ETBE), tert-amyl methyl ether (TAME) and diisopropyl ether (DIPE); aromatics: benzene, toluene, ethylbenzene and xylenes (BTEX) and other compounds causing odour events such as dicyclopentadiene (DCPD) and trichloroethylene (TCE) in soils has been developed. On the basis of US Environmental Protection Agency (EPA) method 5035A, a fully automated closed-system purge-and-trap coupled to gas chromatography/mass spectrometry (P&T-GC/MS) was optimised and permitted to detect microg/kg concentrations in solid matrices avoiding losses of volatile compounds during operation processes. Parameters optimised were the sampling procedure, sample preservation and storage, purging temperature, matrix effects and quantification mode. Using 5 g of sample, detection limits were between 0.02 and 1.63 microg/kg and acceptable method precision and accuracy was obtained provided quantification was performed using adequate internal standards. Soil samples should be analysed as soon as possible after collection, stored under -15 degrees C for not longer than 7 days if degradation products have to be analysed. The non-preservative alternative (empty vial) provided good recoveries of the most analytes when freezing the samples up to 7 day holding time, however, if biologically active soil are analysed the preservation with trisodium phosphate dodecahydrate (Na(3)PO(4).12H(2)O or TSP) is strongly recommended more than sodium bisulphate (NaHSO(4)). The method was finally applied to provide threshold and background levels of several gasoline additives in a point source and in sites not influenced by gasoline spills. The proposed method provides the directions for the future application on real samples in current monitoring programs at gasoline pollution risk sites where till now little monitoring data for MTBE in soils are available. |
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Authors:
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Mònica Rosell; Sílvia Lacorte; Damià Barceló |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2006-08-09 |
Journal Detail:
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Title: Journal of chromatography. A Volume: 1132 ISSN: 0021-9673 ISO Abbreviation: J Chromatogr A Publication Date: 2006 Nov |
Date Detail:
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Created Date: 2006-10-18 Completed Date: 2006-12-15 Revised Date: 2009-01-15 |
Medline Journal Info:
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Nlm Unique ID: 9318488 Medline TA: J Chromatogr A Country: Netherlands |
Other Details:
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Languages: eng Pagination: 28-38 Citation Subset: IM |
Affiliation:
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Department of Environmental Chemistry, IIQAB-CSIC, Jordi Girona 18-26, 08034 Barcelona, Catalonia, Spain. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Benzene
/
analysis,
chemistry Benzene Derivatives / analysis, chemistry Ethers / analysis, chemistry Ethyl Ethers / analysis, chemistry Gas Chromatography-Mass Spectrometry / methods* Gasoline / analysis* Indenes / analysis, chemistry Methyl Ethers / analysis*, chemistry Reproducibility of Results Soil / analysis* Toluene / analysis, chemistry Trichloroethylene / analysis, chemistry Xylenes / analysis, chemistry tert-Butyl Alcohol / analysis, chemistry |
| Chemical | |
Reg. No./Substance:
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0/Benzene Derivatives; 0/Ethers; 0/Ethyl Ethers; 0/Gasoline; 0/Indenes; 0/Methyl Ethers; 0/Soil; 0/Xylenes; 100-41-4/ethylbenzene; 108-20-3/diisopropyl ether; 108-88-3/Toluene; 1634-04-4/methyl tert-butyl ether; 637-92-3/ethyl tert-butyl ether; 71-43-2/Benzene; 75-65-0/tert-Butyl Alcohol; 77-73-6/dicyclopentadiene; 79-01-6/Trichloroethylene; 994-05-8/tertiary-amyl methyl ether |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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