SIMULTANEOUS DETERMINATION OF TRACE-ELEME NTS IN NICKEL BY AN IMPROVED ANION-EXCHANGE SEPARATION

The separation and simultaneous determination of trace amounts of Fe, Cu, Zn, Ga, Mo, Cd, In and Sn in Ni were studied. After the sample was dissolved in a mixture of hydrochloric acid and nitric acid, Fe, Cu, Zn, Ga, Mo, Cd, In and Sn were separated from Ni by adsorption on an a nion exchange resin column as their chloro complexes in hydrochloric a cid media, and then eluted with nitric acid, followed by determination with ICP-AES and ICP-MS. Fe, Cu, Zn, Ga, Mo, Cd, In and Sn were quant itatively recovered throughout the adsorption on a column (phi, 15 mm) packed with 7.5 g of anion exchange resin in 5 mol.dm(-3) hydrochlori c acid and the elution with 40 cm(3) of 2 mol.dm(-3) nitric acid. Wher eas, Ni was little recovered by the proposed method. The detection lim its (mu g.g(-1)) of each element with the proposed method by ICP-AES ( ICP-MS) were found to be 1.66 for Fe, 0.056 for Cu, 7.95(0.21) for Zn, 0.034(0.013) for Ga, 0.45(0.021) for Mo, 0.043(0.033) for Cd, 0.69(0. 004) for In and 1.53(0.60) for Sn using 1.0 g of Ni sample. The propos ed method was applied to an analysis of the reference material, the re sults agreed with the certified values.