Detection of O,O,S-Trimethyl Phosphorodithioate, and Impurity in Phenthoate (PAP), in Komatsuna

摘要

An unknown peak (peak A) was detected in a mass chromatogram of komatsuna extract containing a high concentration of phenthoate (PAP), and it was considered to be O,O,S-trimethyl phosphorodithioate (OOS). Although it is generally known that OOS exists as an impurity in technical malathion and PAP, it has not been reported that OOS is present in crops. Since and OOS standard is not commercially available, OOS was separated and purified from commercial emulsifi- able malathion.