Gas chromatographic determination of residues of insecticidal carbamates.

Abstract

With the increasing concern over the effect of the persistent organochlorine insecticides on the living environment, alternative pesticides have been increasingly used, notably the organophosphates and the carbamates. There are two main groups of insecticidal carbamates, the N-methyl- and the N,N-dimethylcarbamates. The latter are used only to a limited extent, especially in the United States, because of the greater insecticidal spectrum and potency exhibited by the N-methylcarbamates (O’Brien 1967). The N-methylcarbamates can be further subdivided, according to the nature of the functional group attached to the carbamyl moiety, into the aryl and the oxime N-methylcarbamates; the aryl N-methylearbamates are the most important from the standpoint of number and tonnage used in pest-control work.