ICP-MS直接进样法测定白酒中24种金属元素  

Determination of 24 Kinds of Metal Elements in Baijiu(Chinese Liquors)by ICP-MS Using Direct Sampling

作　　者：侯敏[1,2] 李志 孙啸涛[1,2] 马雅杰[1,2] 郑福平[1,2] 孙宝国[1,2] 

机构地区：[1]北京工商大学北京食品营养与人类健康高精尖创新中心,北京100048 [2]北京工商大学食品质量与安全北京实验室,北京100048 [3]赛默飞世尔科技(中国)有限公司,北京100007

出　　处：《中国食品学报》2017年第5期239-246,共8页Journal of Chinese Institute Of Food Science and Technology

基　　金：国家重点研发计划项目(2016YFD0400501);国家自然科学基金项目(31301466);北京市教委科技计划重点项目(KZ201410011015)

摘　　要：采用电感耦合等离子体质谱仪(ICP-MS)通过基体匹配、在线内标校正以及直接进样,建立白酒中As、Cd、Pb、Mn、V、Cr、Fe、Co、Ni、Cu、Zn、Se、Rb、Sr、Ag、Cs、La、Pr、Nd、Sm、Eu、Gd、Tl、U 24种金属元素含量的测定方法。该方法线性范围0~100μg/L,检出限0.0001~0.2189μg/L,除Zn和Ag的加标回收率分别为76.5%和69.4%外,其余22种金属元素的加标回收率为93.8%~109.8%;空白加标的相对标准偏差除Fe为5.66%外,其余23种元素的相对标准偏差均在5%以下(n=6)。分别采用白酒直接进样和消解后进样,24种金属元素含量测定结果无显著差异,表明直接进样法可作为测定白酒中金属元素含量的一种快速、环保、便捷的方法。A novel method for the determination of the concentrations of 24 kinds of metal elements including As, Cd, Pb, Mn, V, Cr, Fe, Co, Ni, Cu, Zn, Se, Rb, Sr, Ag, Cs, La, Pr, Nd, Sm, Eu, Gd, TI and U in Baijiu （Chinese liquors） by ICP-MS using direct sampling was established. Matrix matching and online internal calibration were applied to determine the concentrations of 24 kinds of metal elements in Baijiu. The linear range of 24 kinds of elements was 0-100μg/L, the detection limits of the 24 kinds of elements were in the range of 0.0001-0.2189μg/L with the recovery rates among 93.8%-109.8% except Zn and Ag, the recovery rates of Zn and Ag were 76.5% and 69.4% respec- tively. The relative standard deviation of the blank was under 5% except that of Fe （n = 6） was 5.66%. Determination results of the concentration of 24 kinds of metal elements revealed that there was no significant difference between direct sampling and sampling after digestion, which showed that the novel method of direct sampling can be used in the multi-element analysis in Baijiu with the advantages of quickness, environment-friend and convenience compared with the traditional method of sampling after digestion.

关 键 词：电感耦合等离子体质谱 基体匹配 白酒 多元素分析 直接进样 

分 类 号：O657.63[理学—分析化学] TS262.3[理学—化学]