Application of sorbent extraction for preconcentration/separation of trace amounts of cadmium(II), silver(I), gold(II) and lead(II) from metallic zinc samples and their determinations by atomic absorption spectrometry

摘要

The determinations of cadmium(II), silver(I), gold(II) and lead(II) in metallic zinc samples were performed using separation-preconcentrations procedure on an Amberlite XAD-16 adsorption resin column. Cadmium, silver, gold and lead were quantitatively recovered and separated from a solution containing 1 M HCl and 0.3 M NaI. Effects of the matrix have been investigated. The recoveries of interestingelements were found to be in the range of 95-103% through the use of proposed method. The procedure was successfully applied to the determination of trace impurities in four metallic zinc samples (recoveries > 95%, relative standard deviations < 10).