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时间:2020-04-22
《高效液相色谱-串联质谱法快速测定乳与乳粉中20种同化激素-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、※分析检测JournalofDairyScienceandTechnology2014,VoL37No.38高效液相色谱.串联质谱法快速测定乳与乳粉中20种同化激素蔡玮红,何敏恒,李秀英,黄金风,杜伟锋,李佩斯,冼燕萍,侯向昶,郭新东木(广州质量监督检测研究院国家加工食品质量监督检验中心(广帅1),广东广』、I,I510110)摘要:建立了液相色谱.电喷雾串联质谱同时测定乳与乳粉中11种甾类和9种一受体激动剂类同化激素的快速确证方法。样品经体积分数0.1%甲酸乙腈溶液提取,正己烷脱脂,HLB固相萃取柱净化后,以0.1%甲酸甲醇一0.1%甲
2、酸水为流动相梯度洗脱,通过C色谱柱分离,电喷雾正离子多反应监测模式检测。在优化条件下,20种目标物在O.05~50I,tg/L范围内线性良好,相关系数均大于0.996;方法定量限(RsN=10)在0.1~1.0Ixg/kg之间;不同添加水平回收率为52.8%~97.4%,相对标准偏差(=6)为2.8%~9.6%。多种市售纯牛奶和乳粉的测定结果表明,该方法操作简单、测定结果准确,可用于乳与乳粉中甾类和受体激动剂类激素多残留的快速测定。关键词:液相色谱.电喷雾串联质谱;甾类;.受体激动剂;乳;乳粉QuickDeterminationof20A
3、nabolicHormonesinMilkandMilkPowderbyLC·-MS-MSCAIWei-hong,HEMin-heng,LIXiu-ying,HUANGJin-feng,DUWei—feng,LIPei—si,XIANYan-ping,HOUXiang—chug,GUOXin—dong:(GuangzhouQualitySupervisionandTestingInstitute,NationalCentreforQualitySupervisionandTestingofProcessedFood(Guangzhou),
4、Guangzhou510110,China)Abstract:Aquickconfirmativemethodforthedeterminationofresidualamountsof11anabolichormonesand9agonistsinmilkandmilkpowderbyliquidchromatography-tandemmassspectrometry(LC-MS-MS)wasdeveloped.Sampleswereextractedwithacetonitrilecontaining0.1%formicacidby
5、volume.AfterlitIidremovalbyliquid—liquidextractionwithn-hexane,thepurificationoftheextractwascarriedoutonanOasisHLBcartridgebysolid-phaseextraction.TheanalyteswereseparatedonaC8columnemployingamobilephasecomposedofamixtureofmethanolwithO.1%formicacidand0。l%formicforgradie
6、ntelution.Thetandemmassspectralacquisitionwasdoneinthepositiveelectrosprayionizationmodeutilizingmultiplereactionmonitoring.Externalstandardmethodwasappliedforquantization.Theresultsindicatedthatthelimitsofquantification(LOQs,RsN=lO)for20targetcompoundsrangedfrom0.1to1.0~
7、tg/kg,andthelinearrangewas0.05—50g/Lwithcorrelationcoeficientslargerthan0.996.Theaveragerecoveriesatdifferentspikedconcentrationlevelsrangedfrom52.8%to97.4%withRSDof2.8%.6%=6).TheproposedmethodhasbeenappliedfortherapiddeterminationofrealsamplesofmilkandIniIkpowderwithsimp
8、leoperationandaccurateresults.Keywords:liquidchrorna~graphy-tandemmassspectrometry(LC—MS—Ms);ana
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