Pang G F, Chao Y Z, Liu X S, Fan C L
Qin Huangdao Import and Export Commodity Inspection Bureau, Hebei, People's Republic of China.
J AOAC Int. 1995 Nov-Dec;78(6):1474-80.
A simple and rapid liquid chromatographic (LC) method has been developed for simultaneous determination of 9 pyrethroid insecticides (biphenthrin, cypermethrin, fenpropathrin, fenvalerate, flucythrinate, methothrin, permethrin, py-115, and tetramethrin) in fruits and vegetables. Residues are extracted from crops with methanol and partitioned with toluene. Extracts are cleaned up by Florisil-charcoal column chromatography. LC separation is performed on a muBondapak C18 stainless steel column with acetonitrile-deionized water as mobile phase. The insecticides are detected at 206 nm with 0.03 absorbance unit full scale. Recoveries of 9 pyrethroid insecticides from 6 crops (cucumbers, tomatoes, cabbages, apples, pears, and peaches) fortified at 0.5-5.0 mg/kg were 62.7-129.2%. Detection limits were about 0.05 mg/kg, except for py-115, for which detection limit was 0.10 mg/kg.
已开发出一种简单快速的液相色谱（LC）方法，用于同时测定水果和蔬菜中的9种拟除虫菊酯类杀虫剂（联苯菊酯、氯氰菊酯、甲氰菊酯、氰戊菊酯、氟氰戊菊酯、氯菊酯、氯菊酯、py - 115和胺菊酯）。用甲醇从作物中提取残留物，并用甲苯进行分配。提取物通过弗罗里硅土 - 活性炭柱色谱法进行净化。在μBondapak C18不锈钢柱上进行LC分离，以乙腈 - 去离子水作为流动相。在206 nm处检测杀虫剂，满量程吸光度为0.03单位。在6种作物（黄瓜、西红柿、卷心菜、苹果、梨和桃子）中添加0.5 - 5.0 mg/kg的9种拟除虫菊酯类杀虫剂的回收率为62.7 - 129.2%。除py - 115的检测限为0.10 mg/kg外，其他杀虫剂的检测限约为0.05 mg/kg。
