苹果果实各部位菊酯类农药残留量分析

用正己烷-丙酮(体积比为1∶1)作提取剂,采用石英毛细管柱、电子捕获检测器,用气相色谱法测定苹果果皮、果肉、果核中甲氰菊酯、氯氰菊酯、氰戊菊酯、溴氰菊酯农药残留量.对苹果果肉试验结果表明,甲氰菊酯的回收率为80.9%～103.6%,相对标准偏差为1.30%～5.18%;氯氰菊酯的回收率为86.1%～103.9%,相对标...

ANALYSIS ON PYRETHROID PESTICIDE RESIDUES IN EACH PART OF APPLE

The pyrethroid residues including fenpropathrin, eypermethrin, fenvalerate and dehamethrin in the peel, pulp and kernel of apple were extracted with hexane -acetone （volume ratio 1：1）, separated in quartz capillary and determined with the electron capture detector - GC. The results showed that the recoveries of fenpropathrin, cypermethrin, fenvalerate and dehamethrin ranged from 80.9% to 103.6% ,86.1% to 103.9% ,81.3% to 102.9% and 80.1% to 103.8% respectively. Their RSD ranged from 1.30% to 5.18% , 1.32% to 5.01%, 2.09%to 5.30% and 2.43% to 6.39% respectively. The results indicated that there were significant differences in the contents of pyrethroid residues in the peel, pulp and kernel of apples, and the pyrethroid residues in peel is most.