Kinetic Study and Determination of Some Insecticides in Soil Samples by Ultrasonic Extraction Followed by Gradient HPLC

Abstract

- Ultrasonic Extraction method followed by gradient HPLC was carriedout for the simultaneous determination of four insecticides are [imidacloprid(Imi), thiamethoxam (Thi), indoxacarb (Ind) and abamectin (Aba)] used tocombat the major insect pests in Iraq, whitefly, Dubas Bug, worms fruits as wellas to combat the spiders – dream respectively in eco-soil samples. The extractionrecovery was in the range of 99.77 to 109.1 %. The dissipation kinetics andresidual levels of these insecticides in soil sample was studied under fieldecosystem. The half-life of the mix insecticides was determined. The half-life wasin range of 0.38 to 4.06 days with the soil samples were brought from theAgricultural Land called Nahrawan located in the south-east of Baghdad. Suchthese studies contributed to scientific bases to know the behaver the deferentinsecticides mixtures form and to determinate the battier dose uses in application.The coefficient variation (C.V %) was less than (14.1%).