蔬菜水果中25种有机氯农药残留快速检测方法

Rapid determination method for 25 organchlorine pesticides in vegetables and fruits

采用固相萃取替代传统的液 液萃取技术和柱层析前处理技术 ,使蔬菜、水果中有机氯 2 5种农药残留迅速得到分离、净化和浓缩 .用双柱双ECD气相色谱同时定性、定量测定 2 5种有机氯农药残留 ;2 5种农药在 6种蔬菜、水果中 3个浓度添加水平 ,平均回收率为 70 %— 12 0 % ,变异系数小于 2 0 % ,在HP 1和HP 17柱上最低检出限分别为 :0 0 0 11— 0 0 6 0 0mg kg ,0 0 0 10— 0 75 75mg kg .一个蔬菜、水果样品经一次处理 ,在 1 0— 1 5小时内即可完成农药残留的检测 。

Using Solid Phase Extraction,25 organochlorine pesticides in vegetables and fruits were extrated cleaned up,and concentrated. The residues of 25 organochlorine pesticides were identified simultaneously and quantitation using Gas Chromatography with dual column and dual electron capture detector (ECD). The average recoveries of the three spiked levels of 25 organochlorine pesticides were 70%—120% in 6 vegetables and fruits. TheCoefficient of Variation ( CV ) is less than 20%. The ranges of minimum detection limits were 0 0011—0 0600?mg/kg,0 0010—0 7575?mg/kg in HP 1 column and HP 17 column respectively.