Determination of Bayer 19639 Residues in Agricultural Crops by Cholinesterase Inhibition1

Abstract
Bayer 19639 (Di-syston), a very weak cholinesterase inhibitor, is oxidized to a much stronger inhibitor by a mixture of hydrogen peroxide and acetic acid. Using this activating procedure, Bayer 19639 residues arc detected in agricultural crops by a cholinesterase inhibition method.

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