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建立了微波消解法消解皮革样品,ICP-MS同时测定皮革中的Co,Ni,Cu,Cd,Sb,Hg,Pb 7种微量元素的方法。通过优化微波消解条件、ICP-M S各项参数以及选用~(45)Sc,~(72)Ge,~(115)In,~(209)Bi元素为内标混合液校正基体效应和信号漂移,测得皮革中的7种微量元素的检出限在0.57~2.43μg/L之间,7种元素在25~125μg/L范围内呈现良好的线性关系,线性相关系数均大于0.9999,样品加标回收率在95.5%~106.3%之间,相对标准偏差(n=10)在0.6%~2.2%之间。
A method for simultaneous determination of seven trace elements of Co, Ni, Cu, Cd, Sb, Hg and Pb in leather by ICP-MS by microwave digestion was established. The matrix effect and signal drift were corrected by optimizing the conditions of microwave digestion, ICP-MS parameters, and the selection of ~ (45) Sc, ~ (72) Ge, ~ (115) In and ~ , The detection limit of seven trace elements in leather was between 0.57 ~ 2.43μg / L, the seven elements showed a good linear relationship in the range of 25 ~ 125μg / L, the linear correlation coefficient was greater than 0.9999, the sample plus The standard recoveries ranged from 95.5% to 106.3%, and the relative standard deviations (n = 10) ranged from 0.6% to 2.2%.