Confirmation of some nitro group-containing pesticides by chemical reduction and gas chromatography with electrolytic conductivity detection

Fenitrothion sprayed on a pond: kinetics of its distribution and transformation in water and sediment

“…Fenitrooxon was purified in the same way, except that the eluting solvent was 1:1 (v/v) ethyl acetate-benzene. Aminofenitrothion was prepared by chromous chloride reduction of fenitrothion (Lawrence et al, 1977) and was stable for months in oxygenated toluene or hexane.…”

Pesticide residues

“…Lawrence and co-workers (232) confirmed some N02containing pesticides by chemical reduction and GLC with electrolytic conductivity detection.…”

Confirmation of paranitrophenol as a human urinary metabolite at the nanogram level

“…Confirmational methods for some nitro-containing pesticides have been shown to be effective at the part per million level by reduction of the nitro group to an amino group (Lawrence et al, 1977) with detection of the amino group by the Coulson conductivity detector. The procedure made use of chromous chloride as a reducing agent (Forbes et al, 1975) which has been shown to reduce a number of organophosphorus insecticides containing nitro groups.…”

“…In the work described herein, a confirmation procedure was developed by making use of a combination of reactions. Chromous chloride reduction of the nitro group to an amine group (Lawrence et al, 1977) was followed by an adaptation of a method for formation of the amide (Bradway and Shafik, 1977) using heptafluorobutyric anhydride. The procedure has been tested on human urine Department of Preventive Medicine and Environmental Health, University of Iowa College of Medicine, Iowa City, Iowa 52242.…”