Optimization study of the azamethiphos degradation using chlorine dioxide

Abstract

In the present study, the degradation of azamethiphos using chlorine dioxide was studied. The optimization of the azamethiphos degradation in terms of chloriпe dioxide dosage, different time of degradation and at different рН values, was performed in system with deionized water. The degradation was monitored using high performance liquid chromatography (НPLC-DAD) analysis. It was found that complete degradation was achieved with optimal concentration of 5 mg/dm3 chlorine dioxide at concentration of azamethiphos solution of 10 mg/dm3 under light after 1 h treatment and also at рН 9.00 after 30 min treatment at the same concentration of chlorine dioxide. Gas chromatography coupled with triple quadrupole mass detector (GC-QQQ) was also used to identify degradation products of azamethiphos.