Residue Analysis of Imidaclothiz in Rice by HPLC

The sample was extracted by dichloromethane, cleaned by mixed florisil and activated cabon column. The target ingredient was separated by HPLC and detected by PAD detector at 270 nm. The average recoveries were 89.27-98.11%, and the coefficient of variation was 0.55-3.64%. The minimum detectable quantity of imidaclothiz was 0.2 ng. The lowest detectable concentration of field water, soil, straw, rice shell and hulled rice samples were 0.000 4 mg/L, 0.005, 0.01, 0.02, 0.005 mg/kg, respectively.