Determination of Residues from the Herbicide 2,4-Dichloro-l-(4-nitrophenoxy)-benzene in Rice and Wheat by Electron Capture Gas-Liquid Chromatography

Abstract

A residue method has been developed which is capable of determining not only 2,4-dichloro-1-(4-nitrophenoxy)-benzene but a majority of the known metabolites of this compound. The residues are reduced to a common amine intermediate which is further derivatized and quantitatively measured by electron capture gasliquid chromatography. The method is sensitive to 0.01 ppm and is readily suited to routine use. The method has been used on rice and wheat samples.