第32卷,第3期2023年3月化学分析计量CHEMICALANALYSISANDMETERAGEVol.32,No.3Mar.2023固相萃取-高效液相色谱法测定奶粉中多环芳烃郭新颖,陆娟(南通市疾病预防控制中心,江苏南通226001)摘要建立固相萃取-高效液相色谱法测定配方奶粉中多环芳烃的方法。样品经水提取、乙腈粗去蛋白,提取液经优化配比的MWCNTs和PSA固相萃取净化,用高效液相色谱荧光检测器测定。结果表明,11种多环芳烃的方法检出限为0.10~0.75μg/kg,低、中、高三个浓度水平的加标回收率范围为86.3%~97.4%,测定结果的相对标准偏差为2.4%~7.3%(n=6)。该方法简单快速、准确,适用于对奶粉样品中11种多环芳烃测定要求,可为食品卫生监管部门提供参考方法。关键词多环芳烃;奶粉;高效液相色谱法;荧光检测器中图分类号:O657.7文献标识码:A文章编号:1008-6145(2023)03-0018-04Determinationofpolycyclicaromatichydrocarbonsinmilkpowderbysolidphaseextraction-highperformanceliquidchromatographyGUOXinying,LUJuan(NantongCenterforDiseaseControlandPrevention,Nantong226001,China)AbstractAsolidphaseextraction-highperformanceliquidchromatography(HPLC)wasestablishedforthedeterminationofpolycyclicaromatichydrocarbons(PAHs)informulamilkpowder.Thesamplewasextractedwithwaterandcrudeproteinwasremovedwithacetonitrile.TheextractwaspurifiedbysolidphaseextractionwithMWCNTsandPSAintheoptimizedratio,andanalyzedbyHPLCwithfluorescencedetector.Thedetectionlimitof11PAHswas0.10-0.75μg/kg,therecoveryrangeoflow,mediumandhighconcentrationlevelsadditionwas86.3%-97.4%,andtherelativestandarddeviationofdeterminationresultswas2.4%-7.3%(n=6).Themethodissimple,rapid,accurate,whichissuitableforthedeterminationof11PAHsintheactualsamplesofmilkpowder,anditprovidesareferencemethodforthefoodhygienesupervisiondepartment.Keywordspolycyclicaromatichydrocarbons;milkpowder;highperformanceliquidchromatography;fluorescencedetector多环芳烃(PAHs)是以稠环形式相连至少含有2个苯环的有机化合物,是煤、石油、木材等有机化合物不完全燃烧和地球化学生物循环过程中普遍产生的一类致癌物质,迄今已发现有数百种,其中有相当一部分具有强烈的致癌和致畸性[1‒3]。食品中PAHs污染来源广泛,受到环境介质和食品加工过程的复合污染,是...