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  

Simultaneous Determination of 7 Trace Elements in Meat and Meat Products by Inductively Coupled Plasma Mass Spectrometry(ICP-MS) with Microwave Digestion

作　　者：吴春敏[1] 夏静[1] 李强[1] 张岩[1] 

机构地区：[1]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

出　　处：《肉类研究》2015年第3期27-29,共3页Meat Research

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。A method for the simultaneous determination of 7 trace elements （lead, arsenic, cadmium, chromium, selenium, mercury, and nickel） in meat and meat products by inductively coupled plasma mass spectrometry （ICP-MS） with microwave digestion was established. Samples were pretreated by microwave digestion and determined by ICP-MS with rhodium （Rh） as the internal standard. The microwave digestion conditions and the instrumental parameters were optimized. It was found that the instrumental signal drift and matrix effect could be overcome by using the internal standard method. The developed standard curve was linear in the range of 0 to 20 ng/mL, with a correlation coefficient of more than 0.999. The recoveries of the analytes in spiked samples ranged from 89.4% to 98.9% and the precision expressed as relative standard deviation was less than 5%. The limits of detection for the trace elements were all lower than those stipulated in the Chinese national standards. The proposed method was rapid, accurate, reliable, sensitive and suitable for simultaneous multi-element analysis of meat and meat products.

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 

分 类 号：TS251.7[轻工技术与工程—农产品加工及贮藏工程]