| Title: | Simultaneous quantification of polar and non-polar volatile organic compounds in water samples by direct aqueous injection-gas chromatography/mass spectrometry |
| Author(s): | Aeppli C; Berg M; Hofstetter TB; Kipfer R; Schwarzenbach RP; |
| Address: | "Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dubendorf, Switzerland" |
| DOI: | 10.1016/j.chroma.2007.12.043 |
| ISSN/ISBN: | 0021-9673 (Print) 0021-9673 (Linking) |
| Abstract: | "A direct aqueous injection-gas chromatography/mass spectrometry (DAI-GC/MS) method for trace analysis of 24 volatile organic compounds (VOCs) in water samples is presented. The method allows for the simultaneous quantification of benzene, toluene, ethyl benzene, and xylenes (BTEX), methyl tert-butyl ether (MTBE), tert-butyl alcohol (TBA), as well as a variety of chlorinated methanes, ethanes, propane, enthenes and benzenes. Applying a liquid film polyethylene glycol or a porous layer open tubular (PLOT) divinylbenzene GC capillary column to separate the water from the VOCs, volumes of 1-10 microL aqueous sample are directly injected into the GC. No enrichment or pretreatment steps are required and sample volumes as low as 100 microL are sufficient for accurate quantification. Method detection limits determined in natural groundwater samples were between 0.07 and 2.8 microg/L and instrument detection limits of <5 pg were achieved for 21 out of the 24 evaluated VOCs. DAI-GC/MS offers both good accuracy and precision (relative standard deviations |
| Keywords: | "Gas Chromatography-Mass Spectrometry/*methods Methyl Ethers/analysis Organic Chemicals/*analysis Reproducibility of Results Sensitivity and Specificity Volatilization Water Pollutants, Chemical/*analysis;" |
| Notes: | "MedlineAeppli, Christoph Berg, Michael Hofstetter, Thomas B Kipfer, Rolf Schwarzenbach, Rene P eng Research Support, Non-U.S. Gov't Netherlands 2008/01/19 J Chromatogr A. 2008 Feb 15; 1181(1-2):116-24. doi: 10.1016/j.chroma.2007.12.043. Epub 2007 Dec 23" |
