Gas-liquid chromatographic determination of sodium 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoate residues on soybeans and foliage, soil, milk, and liver.
Residues of sodium 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoate and its free acid are determined by treating a sample extract with diazomethane to convert the residues to methyl 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoate. This compound is purified by chromatography on Florisil and measured by electron capture gas-liquid chromatography. The method has been used on soybeans, soybean foliage, soil, milk, and liver. It can detect 0.01 ppm with recoveries of 70--75%.
D000818:Animals; D002417:Cattle; D002849:Chromatography, Gas / Q000379:methods; D005504:Food Analysis; D006540:Herbicides / Q000032:analysis*; D008099:Liver / Q000032:analysis; D008892:Milk / Q000032:analysis; D009579:Nitrobenzoates / Q000032:analysis*; D010573:Pesticide Residues / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis; D013025:Glycine max / Q000032:analysis
D006540:Herbicides; D009579:Nitrobenzoates; D010573:Pesticide Residues; D012989:Soil Pollutants