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1、肉类研究2015,Vol.29,No.327中国肉类食品综合研究中心CHINAMEATRESEARCHCENTERMEATRESEARCH分析检测微波消解-电感耦合等离子体质谱法同时测定肉及肉制品中7种痕量元素吴春敏,夏静,李强,张岩*(河北省食品检验研究院,河北省食品安全重点实验室,河北石家庄050091)摘 要:建立采用电感耦合等离子体质谱法对肉及肉制品中铅、砷、镉、铬、硒、汞、镍7种痕量元素同时检测的方法。用微波消解仪对肉及肉制品进行前处理,以铑作为内标,经电感耦合等离子体质谱仪针对7种痕量元素进行测定。优化微波消解条件以及电感耦合等离子体质谱仪器测定条件。结果表明:内标
2、法能克服仪器信号漂移及样品基体效应的影响。标准曲线的线性范围在0~20ng/mL,回归方程的相关系数均大于0.999,各元素的加标回收率在89.4%~98.9%之间,相对标准偏差小于5%,检出限均低于国标方法中所规定的方法检出限。该方法具有快速、准确、可靠、灵敏度高及多元素同时分析等优点,可以满足批量肉及肉制品中铅、砷、铬、镉、硒、镍、汞检验和测定。关键词:微波消解;电感耦合等离子体质谱;肉及肉制品;重金属SimultaneousDeterminationof7TraceElementsinMeatandMeatProductsbyInductivelyCoupledPlasm
3、aMassSpectrometry(ICP-MS)withMicrowaveDigestionWUChunmin,XIAJing,LIQiang,ZHANGYan*(KeyLaboratoryofFoodSafetyofHeibeiProvince,HebeiInstituteofFoodQualitySupervisionResearch,Shijiazhuang050091,China)Abstract:Amethodforthesimultaneousdeterminationof7traceelements(lead,arsenic,cadmium,chromium,s
4、elenium,mercury,andnickel)inmeatandmeatproductsbyinductivelycoupledplasmamassspectrometry(ICP-MS)withmicrowavedigestionwasestablished.SampleswerepretreatedbymicrowavedigestionanddeterminedbyICP-MSwithrhodium(Rh)astheinternalstandard.Themicrowavedigestionconditionsandtheinstrumentalparameters
5、wereoptimized.Itwasfoundthattheinstrumentalsignaldriftandmatrixeffectcouldbeovercomebyusingtheinternalstandardmethod.Thedevelopedstandardcurvewaslinearintherangeof0to20ng/mL,withacorrelationcoefficientofmorethan0.999.Therecoveriesoftheanalytesinspikedsamplesrangedfrom89.4%to98.9%andtheprecisi
6、onexpressedasrelativestandarddeviationwaslessthan5%.ThelimitsofdetectionforthetraceelementswerealllowerthanthosestipulatedintheChinesenationalstandards.Theproposedmethodwasrapid,accurate,reliable,sensitiveandsuitableforsimultaneousmulti-elementanalysisofmeatandmeatproducts.Keywords:microwave
7、digestion;inductivelycoupledplasmamassspectrometry(ICP-MS);meatandmeatproducts;heavymetal中图分类号:TS254文献标志码:A文章编号:1001-8123(2015)03-0027-03doi:10.7506/rlyj1001-8123-201503007人民生活水平日益提高的今天,食品安全问题已经内成千上万倍的富集起来,通过加工成肉制品后进入人体成为人类共同关注的焦点,由于环境、运输、各种加工内,其二来