电感耦合等离子体质谱法测定畜禽肉中10种微量元素

Determination of Ten Micro Elements in Poultry and Livestock Meat by Inductively Coupled Plasma Mass Spectrometry

采用电感耦合等离子体质谱法（Inductively coupled plasma mass spectrometry，ICP-MS）测定畜禽肉中Cr、Ni、Cu、Zn、As、Se、Cd、Sn、Ba、Pb等10种微量元素的分析方法。采用硝酸高氯酸体系对样品进行消解，基于氢气和氦气混合的碰撞反应池技术有效地消除了多原子离子对待测元素的干扰，选用Sc、Ge、Y、Rh、In、Re等元素为内标混合液校正基体干扰和漂移。方法的检出限在0．003～0．780μg／L之间，Cu、Zn的线性范围0-200lag／L，Cr、Ni、As、Se、Cd、sn、Ba、Pb的线性范围为0～100μg／L，回归方程相关系数皆大于0．997，加标回收率84．80％～131．40％，相对标准偏差小于5.3％。

A method for simultaneous determination of micro amounts of Cr, Ni, Cu, Zn, As, Se, Cd, Sn, Ba, and Pb in poultry and livestock meat by inductively coupled plasma mass spectrometry, （ICP-MS） was presented. HNO3-HC104 wet digestion was conducted on samples. The polyatomic elements interference was effectively eliminated using a mixture of hydrogen and helium by collision cell technology （CCT）. Sc, Ge, Y, Rh, In, and Re were used as internal standards to correct the matrix interference and drift. The detection limits for the ten elements were in the range of 0.003-0.780 μg/L, and the linear range was between 0 and 200 ixg/L for Cu and Zn, and between 0 and 100 μg/L for eight other elements with a correlation coefficient larger than 0.997. The recoveries of these ten elements from spiked meat samples were in the range of 84.80%-131.40% and the RSD was less than 2.60%.