摘要
Abstract
A method based on inductively coupled plasmaoptical emission spectrometry (ICP-OES) and inductively coupled plasma-mass spectrometry (ICP-MS) detection was established for determination of 15 kinds of impurity elements in food additive calcium carbonate.ICP-OES was applied to determine the elements of Na,Mg and K by choosing suitableanalytical spectral lines and observation mode,the others (A1,As,Ba,Cd,Cr,Cu,Fe,Mn,Pb,Sr,Ti and Hg) were determined by ICP-MS,and the matrix effect and the mass spectrum interferences were corrected by selecting the appropriate isotopes,using internal standards (Sc,Ge,In,Bi) andthe collided reaction cell technology (KED mode).Determination limits of ICP-OES were in the range of 1.16 ～ 18.10 μg/L whileICP-MS were in the range of 0.011 ～～ 0.207 μg/L.Values of RSD's were in the range of 1.1％ ～ 6.4％,and the recoveries were in the range of 93.6％ ～ 108.0％.A mix solution of definiteconcentration of Na,Mg,K,Al,As,Ba,Cd,Cr,Cu,Fe,Mn,Pb,Sr,Ti and Hg in 800mg/L Ca matrix was determined,and the results were accurate.The determination results of samples showedthat the contents ofimpurity elements in light calcium carbonate and groundcalcium carbonate were low.This method was simple,accurate and reliable,and could be used in rapid determining the impurity elements in food additive calcium carbonate.关键词
碳酸钙/ICP-OES/ICP-MS/杂质元素Key words
calcium carbonate/ICP-OES/ICP-MS/impurity elements分类
轻工纺织
