Determination of Impurity Elements in Edible Phosphate by ICP-MS
LI Tan-ping1, XIE Hua-lin2*
1. College of Material and Chemical Engineering, Hunan Institute of Technology, Hengyang 421002, China 2. College of Chemistry and Chemical Engineering, Yangtze Normal University, Fuling 408100, China
Abstract:An octopole reaction system (ORS) inductively coupled plasma mass spectrometry (ICP-MS) was developed for the determination of Mg, Ti, V, Cr, Fe, Co, Ni, Cu, Zn, As, Cd and Pb in edible phosphate. The sample was digested by HNO3 followed by dilution with ultrapure water, then the above 12 impurity elements in the solution were analyzed directly by ICP-MS. The use of ORS can eliminate the interference of polyatomic ions dramatically. Sc, Y, In and Bi were used to correct the matrix interference and drift. The detection limits of the 12 elements are in the range of 0.004~0.362 μg·L-1. This method is rapid, simple and applicable for the analysis of trace elements in edible phosphate.
Key words:Inductively coupled plasma mass spectrometry(ICP-MS);Octopole reaction system (ORS);Phosphate;Impurity elements
李坦平1,谢华林2* . 电感耦合等离子体质谱法测定食品级磷酸盐中杂质元素[J]. 光谱学与光谱分析, 2012, 32(10): 2834-2837.
LI Tan-ping1, XIE Hua-lin2*. Determination of Impurity Elements in Edible Phosphate by ICP-MS . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2012, 32(10): 2834-2837.