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食品研究与并发2012年5月 FoodResearchAndDevelooment第33卷第5期 气质联用法测定空心胶囊中的邻苯二甲酸酯 曾金红。江涛。焦新萍。郑云峰,林海娃,宋海燕,黄晓丽 (绍兴市质量技术监督检测院国家黄酒产品质量监督检验中心,浙江绍兴312071) 摘要:采用改进的液一液萃取提取方法:样品在室温下超纯水中浸泡膨胀软化后在5O℃水浴直至溶解;加乙醚萃取, 于蒸发皿中将乙醚萃取层水浴蒸干;残渣用正己烷转移并定容至1.00mL,微孔膜过滤,结合气相色谱一质谱(GC-MS)联 用分析技术,检测空心胶囊中邻苯二甲酸酯类化合物的含量。该方法线性相关系数>0.997,检出限为0.50mg/L-5.88mrCL 之间;在0.5mg几和4.0mg/L添加水平时样品加标回收率为72.52%一106.37%,RSD(n=6)为2.25%一8.8%。并运用该方 法对市售的空心胶囊进行了检测,结果表明,在25批空心胶囊样品中,有4批空心胶囊检测含有邻苯二甲酸二异丁酯 (DIBP)和邻苯二甲酸二丁酯(DBP),它们的含量范围分别是1.40mg/kg ̄2.63mg/kg和1.24mg/kg ̄1.62mg/kg;1批空心胶 囊中检出含有DIBP,含量是1.85mg/kg。该方法灵敏度高,操作简便、准确,效率高,适用于快速测定空心胶囊中邻苯二 甲酸酯类物质的含量。 关键词:邻苯二甲酸酯;空心胶囊;气相色谱一质谱 DeterminationofPhthalateEstersinVacantCapsulesbyGasChromatography-MassSpectrometry ZENGJin—hong,JIANGTao,JIAOXin-ping,ZHENGYun—feng,LINHai—wa,SONGHai—yan,HUANGXiao—li (Shaoxingtestinginstituteofqualityandtechnicalsupervision,NationalCenterforQualitySupervisionandTestingofRice Wine,Shaoxing312071,Zhejiang,China) Abstract:Thecontentsofphthalateesters(PAEs)invacantcapsulesweredeterminedbyGaschromatography— massspectrometry(GC/MS)analyticmethodafterimprovedliquid—liquidextractioninwhichvacantcapsule samplestobeexaminedweresoakedinwaterforswellingatroomtemperature.andthenheatedat50cI=ina waterbathuntilcompletedissolution.Thesolutionwastransferredintoseparatoryfunnel,ethyletherwasadded, andthefunnelwasshakengentlyandallowedtostand.Aftertheaqueouslayerwasdiscarded,ethyletherlayer wastransferredandevaporatedcarefullytodrynessinawaterbathandtheresiduewasdissolvedin1.00mLof hexane.TheifnalsamplesolutionwasfilteredthroughaMilliporemembranefiherbymeansofasyringebefore injection.Throughthiscondition,thelinearrelationcoefficientsaremorethan0.997,andthelimitsofdetection (LOD)arefrom0.50mg/L-5.88mg/L.Theaveragerecoveriesofthespikedsamples(0.5mg/Land4.0mg/L) areintherangeof72.52%-106.37%withRSDs(n=6)of2.25%-8.8%.TheresultsshowedthatthereareDi— isobutylphthalate(DIBP)andDibutylphthalate(DBP)detectedinfourvacantcapsules,itscontentsrangefrom 1.40mg/kg一2.63mg/kgand1.24mg/kg-1.62