The residue and degradation dynamic of 4 % cartap in rice plant, rice, rice hull, paddyfield water and paddyfield soil was studied. Samples were extracted by petroleum ether, and then purified by liquid-liquid partition and determined by gas chromatography （GC-ECD）. The results indicated that the average fortified recovery of cartap in paddyfield soil, paddyfield water, rice stem, rice hull and rice was 93.25 %-106.85 %, 95.43 %-103.68 %, 90.81%- 100.8 %, 96.77 %-101.09 % and 92.89 %-97.71%, respectively, and the relative standard deviation（...
