Record Display for the EPA National Library Catalog


Main Title Multiclass, Multiresidue Analytical Method for Determining Pesticide Residues in Air.
Author Sherma, Joseph ; Shafik., Talaat M. ;
CORP Author National Environmental Research Center, Research Triangle Park, N.C. Pesticides and Toxic Substances Effects Lab.
Year Published 1974
Stock Number PB-275 984
Additional Subjects Pesticides ; Carbamates ; Gas analysis ; Air pollution ; Chemical analysis ; Extraction ; Distillation ; Chlorine organic compounds ; Electron capture ; Gas chromatography ; Residues ; Reprints ; Air pollution detection ; Electron capture gas chromatography
Library Call Number Additional Info Location Last
NTIS  PB-275 984 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 17p
A multiresidue method for chlorinated, organophosphate and N-methyl carbamate insecticides has been developed for use in the National Air Monitoring Program. The method involves partitioning and extracting the pesticides from the ethylene glycol trapping solvent with methylene chloride followed by fractionation and cleanup by elution through a silica gel column. The chlorinated compounds are determined by electron capture GC, phosphate compounds by flame photometric GC, and carbamates by electron capture GC after derivatization with pentafluoropropionic anhydride. Recovery data and limits of detectability are presented for 11 chlorinated, 7 phosphate, and 7 carbamate pesticides at high and low levels. It is expected that the method will be applicable to many other compounds not successfully determined by the present analytical procedure, and that it may be adaptable for the analysis of pesticide residues in foods and other environmental samples.