气相色谱-串联质谱法测定罗汉果中22种农药残留量任永霞1，黄纯婷2，徐日文1，翁福良1，梁 宁1（1.拱北海关技术中心，广东珠海 519000；2.中山百盛生物技术有限公司，广东中山 528400）摘 要：建立气相色谱-串联质谱法测定罗汉果中22种农药残留量的分析方法。
样品用乙腈提取后经PSA/GCB固相萃取柱净化，采用气相色谱-串联质谱法检测，外标法定量。
结果表明，所有农药在0.005～0.500 μg·mL-1线性关系良好，相关系数R2均大于0.999，方法定量限为0.010 mg·kg-1。
样品中3个加标水平的回收率为71.1%～116.7%，相对标准偏差为0.7%～7.5%。
该方法准确并易于操作，符合农药残留检测要求，可对罗汉果中多种农药进行定性和定量检测。
关键词：罗汉果；气相色谱-串联质谱；固相萃取Determination of 22 Pesticide Residues in Siraitia grosvenorii by Gas Chromatography Tandem Mass Spectrometry REN Yongxia1, HUANG Chunting2, XU Riwen1, WENG Fulang1, LIANG Ning1(1.Technical Center of Gongbei Customs District P.R., Zhuhai 519000, China; 2.Zhongshan PASSION BiotechnologyCo., Ltd., Zhongshan 528400, China)Abstract: A method for the determination of 22 pesticide residues in Siraitia grosvenorii was established by gas chromatography tandem mass spectrometry. The sample was extracted with acetonitrile and purified by PSA/GCB solid-phase extraction column. Gas chromatography tandem mass spectrometry was used for detection, and external standard method was used for quantification. The results showed that all pesticides had good linear relationships within the range of 0.005～0.500 μg·mL-1, with correlation coefficients R2 greater than 0.999. The quantitative limit of the method was 0.010 mg·kg-1. The recoveries of the three spiked levels in the sample were 71.1% ～ 116.7%, with a relative standard deviation of 0.7% ～ 7.5%. The method is accurate and easy to operate, and meets the requirements of pesticide residue detection. It can be used for qualitative and quantitative detection of various pesticides in Siraitia grosvenorii.Keywords:Siraitia grosvenorii; gas chromatography-tandem mass spectrometry; solid phase extraction罗汉果（Siraitia grosvenorii）是葫芦科多年生藤本植物的果实，是国家批准的药食两用食品，具有抗癌、抗氧化、抑菌、免疫、润便通肺以及止咳化痰等功效[1-3]。
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