摘要
建立了毛细管气相色谱法同时分析胡萝卜中百菌清和5种拟除虫菊酯类农药的方法。样品以乙酸乙酯为洗脱剂经基质固相分散(matrix solid-phase dispersion,MSPD)提取和净化,DB-5毛细管柱分离,采用GC-μECD分析、外标法定量。样品加标回收率为80.5%～107.6%,相对标准偏差小于7%,方法检出限为0.003～0.006mg/kg。该方法简便、快速、灵敏、准确,符合蔬菜中百菌清和拟除虫菊酯类农药检测的要求。
A capillary gas chromatography （CGC） was developed for the determination of chlorothalonil and five pyrethroids in carrot. The sample was extracted and purified by matrix solid-phase dispersion （MSPD） with ethyl acetate as the eluent, separated by DB-5 capillary vessel column, analyzed by GC-μECD, and quantified by external standard method. The results showed that the recovery of spiked sample is 80.5% to 107.6% with a relative standard deviation less than 7%, and the detection limit is 0.003 to 0.006 mg/kg. The method is simple, raid, sensitive, accurate and suitable for the detection of chlorothalonil and pyrethroid pesticides in vegetables.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2009年第8期227-230,共4页
Food Science
关键词
基质固相分散(MSPD)
胡萝卜
百菌清
拟除虫菊酯类农药
气相色谱
carrot
chlorothalonil
pyrethroid pesticides
matrix solid-phase dispersion （MSPD）
capillary gas chromatography （CGC）
