I. Mukherjee et M. Gopal, METHODOLOGY FOR THE ESTIMATION OF CHLOROTHALONIL AND ITS METABOLITE IN MUSTARD CROP BY GAS-LIQUID-CHROMATOGRAPHY, Fresenius' journal of analytical chemistry, 351(6), 1995, pp. 590-591
A simplified method for the determination of chlorothalonil (I) and it
s metabolite 4-hydroxy-2,5,6-trichloro-isophthalonitrile (II) in musta
rd crop is described. It involves extraction, derivatisation, clean-up
on a silica-gel column and gas-liquid chromatography. The retention t
imes and detection limits are 4.49, 5.39 min and 0.01, 0.005 mu g/g fo
r I and II, respectively.