Published: Journal of Chromatographic Science, Volume 36, Number 5, May 1998, pp. 263–268.
A Simple Ultraviolet Method for
Discriminating between Polychlorobiphenyls and Organochloride
Pesticides Coeluting Under Gas Chromatography with
Electron-Capture Detection
S.T. Carril González-Barros,
J. Simal Lozano, M.A. Lage Yusty, and M.E. Alvarez Piñeiro
Certain congeners of Aroclor 1260 coelute with o,p'- or p,p'-DDT under gas chromatography with electron-capture detection. We describe a simple ulraviolet irradiation method that allows qualitative and quantitative analyses of mixtures of these organochlorides in complex matrices. Detection limits are 0.20 and 0.22 µg/kg dry mass for Aroclor 1260 and the two DDTs, respectively. The method is applied to six replicate pork liver samples, for which recoveries ranged from 72 to 90%.
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