Triazophos Residue And Multiresidue Determiantion Of Organophosphorous Insecticides In Lichee

Triazophos residue in lichee and soil were extracted with acetone , cleaned up by passing through a aluminum oxide(neutral) active carbon column,eluted with dichloromethane,and determined by capillary gas chromatogramphy with NPD, were positively confirmed by MS-EI.The result showed that this method was sensitive and simple.The minimum amount of detection was 6.5×10^-11g,and the minimum concentrateion of detection was 0.003mg/kg in the lichee skin and 0.001mg/kg in lichee pulp and soil,respectively.The average fortified recoveries of triazophos in lichee skin,pulp and soil were 89.3%—93.0%,86.4%⁹3.4% and 90.4%⁹5.9%,respectively.The coefficients of variation ranged from 2.9%⁸.6% for lichee and soil.Residual trial of lechee and soil were conducted in Guangxi and Guangdong.The result showed that under applied a dose of 500 times...