摘要
建立联苯菊酯、甲氰菊酯、高效氯氟氰菊酯、高效氯氰菊酯、氰戊菊酯和溴氰菊酯6种拟除虫菊酯类农药在金针菇中的多残留分析方法。样品以乙腈为提取溶剂,弗罗里硅土柱层析净化,气相色谱-电子捕获法测定。该检测条件下,联苯菊酯、甲氰菊酯和高效氯氟氰菊酯在0.005～0.50mg/L、高效氯氰菊酯、氰戊菊酯和溴氰菊酯在0.01～1.00mg/L的范围内具有良好的线性关系,线性方程的决定系数大于0.996。添加回收实验结果表明,供试农药在添加量范围平均回收率为85.54%～102.27%,变异系数为1.24%～9.58%,联苯菊酯、甲氰菊酯和高效氯氟氰菊酯的最低检测限为5μg/L,高效氯氰菊酯、氰戊菊酯和溴氰菊酯的最低检测限为10μg/kg。该方法的准确性、精确性和灵敏度均满足农药残留分析的要求。
A method was developed for the multiresidue determination of 6 pyrethroid pesticides in Flammulina velutipes by gas chromatography with electron capture detection.Samples were extracted with acetonitrile and cleaned up on a florisil column before GC-ECD analysis.A good linear relationship with a determination coefficient above 0.996 was found for bifenthrin,fenpropathrin and lambda-cyhalothrin in the range of 0.005-0.5 mg/L and for other three pyrethroid pesticides in the range of 0.01-1.0 mg/L.The mean recoveries for the 6 pyrethroid pesticides ranged from 85.54% to 102.27% in a blank sample of Flammulina velutipes with a relative standard deviation（RSD） between 1.24% and 9.58%.The limit of detection was 5μg/L for bifenthrin,fenpropathrin and cyhalothrin and 10μg/kg for beta-cypermethrin,fenvalerate and deltamethrin.The method was accurate,precise and sensitive,and therefore could meet the requirements for pesticide residue analysis.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2012年第6期199-202,共4页
Food Science
基金
国家林业公益性行业科研专项(200804014)
安徽省优秀青年科技基金项目(10040606Y01)
关键词
金针菇
拟除虫菊酯
残留分析
气相色谱
Flammulina velutipes
pyrethroids
pesticide residue
gas chromatography
