Abstract
A rapid multielement determination method for trace elements in common salts has been examined by means of ICP-MS (inductively coupled plasma mass spectrometry) and ICP-AES (inductively coupled plasma atomic emission spectrometry) after coprecipitation with magnesium in the salt. The recoveries of trace elements (Al, Mn, Fe, Co, Ni, Cu, Zn, REEs) were in the upper 90%, and major constituents of common salt such as Na, Sr, K, and Ca were significantly reduced in the concentrated solutions. Using magnesium in the salts as a coprecipitant, the blank values of almost all analyte elements were lower than or close to the analytical detection limits. Therefore, it has been found that contamination from copreciptant reagents could be significantly reduced. The present method was applied to the determination of trace elements in commercial table salt. As a result, eight elements could be determined by this method.
