Gas-solid chromatographic confirmation of vinyl chloride levels in oils and vinegars by using electrolytic conductivity detection.

A gas-solid chromatographic headspace method has been developed for the quantitative confirmation of vinyl chloride (VC) in oils, and vinegars. The method, based on the electrolytic conductivity detector, permits quantitative confirmation of VC residues as low 0.05 and 0.02 ppm for oil and vinegar, respectively. A number of samples were analyzed by using a previously reported flame ionization method and the proposed technique. The results by using the latter technique averaged 5% lower.