Determination of Volatile Contaminants at the ng I−1Level in Water by Capillary Gas Chromatography with Electron Capture Detection

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Abstract
An improved analytical headspace method is described for the quantiative determination of volatile contaminants in water. Detection limits at the 1.0ng-1−1 levei or better can be achieved for carbon tetrachloride using a suitable capillary column gas chromatograph and electron capture detector. The method is also applicable to the analyses of haloforms and associated halomethanes and haloethanes in drinking waters or quantitation of low ppt concentrations in ground or surface waters. This headspace technique is simple, inexpensive, easily applied to field conditions and well-suited for cryogenic capillary column chromatography.