Simultaneous Determination of Fuel Oxygenates and BTEX Using Direct Aqueous Injection Gas Chromatography Mass Spectrometry (DAI-GC/MS)
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- 作者：Luc Zwank ; Torsten C. Schmidt ; Stefan B. Haderlein ; and Michael Berg
- 刊名：Environmental Science & Technology
- 出版年：2002
- 出版时间：May 1, 2002
- 年：2002
- 卷：36
- 期：9
- 页码：2054 - 2059
- 全文大小：84K
- 年卷期：v.36,no.9(May 1, 2002)
- ISSN：1520-5851
文摘
A direct aqueous injection-gas chromatography/massspectrometry (DAI-GC/MS) method for trace analysis ofgasoline components in water is presented. The methodallows for the simultaneous quantification of the followingsolutes: methyl tert-butyl ether (MTBE), its majordegradation products (tert-butyl formate, tert-butyl alcohol(TBA), methyl acetate, and acetone), and possiblesubstitutes of MTBE as an octane enhancer in gasoline (tert-amyl methyl ether, ethyl tert-butyl ether) as well asbenzene, toluene, ethylbenzene, p-xylene, m-xylene, ando-xylene (BTEX). No enrichment or pretreatment steps arerequired, and sample volumes of only 50 
L are neededfor analysis. The detection limits in two different matrixes(spiked lake water and contaminated groundwater) are
2 g/L for most analytes and <0.2 g/L for MTBE, benzene,and toluene. The accuracy of the DAI-GC/MS methodwas excellent as determined from comparison withheadspace-GC/MS and purge-and-trap-GC/MS. The DAI-GC/MS method has been applied to various environmentalstudies, which demonstrated its versatility. The applicationscomprised both laboratory (MTBE degradation in watertreatment, quantification of polar gasoline components) andfield (MTBE degradation at a gasoline spill site) investigations.
L are neededfor analysis. The detection limits in two different matrixes(spiked lake water and contaminated groundwater) are2 g/L for most analytes and <0.2 g/L for MTBE, benzene,and toluene. The accuracy of the DAI-GC/MS methodwas excellent as determined from comparison withheadspace-GC/MS and purge-and-trap-GC/MS. The DAI-GC/MS method has been applied to various environmentalstudies, which demonstrated its versatility. The applicationscomprised both laboratory (MTBE degradation in watertreatment, quantification of polar gasoline components) andfield (MTBE degradation at a gasoline spill site) investigations.