电感耦合等离子体质谱法测定植物源性食品中稀土元素  

Determination of Rare Earth Elements in Plant Foods by Inductively Coupled Plasma Mass Spectrometry

作　　者：陈珍[1] 曹海微[1] 陈明岩[2] 王英华[1] 徐立明[2] 杨璐[2] 

机构地区：[1]吉林大学化学学院,吉林长春130012 [2]吉林出入境检验检疫局,吉林长春130062

出　　处：《食品与发酵工业》2012年第12期143-146,共4页Food and Fermentation Industries

基　　金：国家质检总局科技计划项目(2011IK208)

摘　　要：建立了植物源性食品中稀土元素的电感耦合等离子体质谱(ICP-MS)的分析方法。实验过程中优化了微波消解条件和ICP-MS工作参数。在微波条件下,采用HNO3+H2O2+HF混酸体系消解样品,以Rh(铑)、Re(铼)作为内标测定样品中的15种稀土元素La(镧)、Ce(铈)、Pr(镨)、Nd(钕)、Sm(钐)、Eu(铕)、Gd(钆)、Tb(铽)、Dy(镝)、Ho(钬)、Er(铒)、Tm(铥)、Yb(镱)、Lu(镥)、Y(钇)。为了验证方法的准确度、可靠性,对照分析了2种国家标准物质芹菜(GSB-26)、大葱(GSB-27),其实验测定值与标准值吻合。15种稀土元素的检出限为7.0～18.6μg/L,各元素测定的RSD(n=11)为0.7%～3.9%。A method of determination of rare earth elements in plant foods by Inductively Coupled Plasma Mass Spectrometry was established. The microwave digestion conditions and ICP-MS operating parameters were optimized. First, the samples were digested by closed vessel microwave HNO3 ＋ H2O2 ＋ HF system, Rh,Re were used as internal standard to determine 15 kinds of rare earth elements including La ,Ce,Pr ,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb, Lu and Y. In order to verify the accuracy and reliability of the method, two standard substarnces celery and green onion were tested and compared with the certified values. The detection limit range was from 7.0μg/L to 18.6 μg/L depending on the rare earth elements, and RSD of the method varied between 0.7% and 3.9% for a set of eleven replicates.

关 键 词：等离子体质谱法(ICP-MS) 稀土元素 植物源性食品 标准物质 

分 类 号：TS207.3[轻工技术与工程—食品科学] O657.63[轻工技术与工程—食品科学与工程]