Abstract：The sample was decomposed using a mixed solution of nitric acid and hydrogen peroxide. The hydrolysis of antimony and bismuth was prevented with tartaric acid. After reduction with ascorbic acid, the solution was filtered and the filtration was collected. The reduced silver was decomposed again using nitric acid-hydrogen peroxide-tartaric acid mixed solution. Then, the matrix silver was precipitated and separated with hydrochloric acid to eliminate the matrix interference. The filtrate was merged. The content of eight impurity elements (copper, bismuth, iron, lead, antimony, palladium, selenium and tellurium) in silver was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) in diluted hydrochloric acid medium. The proper sampling weight (0.50-1.00 g) was obtained by experiments. The residual silver and other existence impurity elements in system had no influence on the determination results. The testing samples were determined using various methods. The determination results were consistent with those obtained by national standard methods. The relative standard deviations (RSD) for copper, bismuth, iron, lead, antimony, palladium, selenium and tellurium were all less than 5.0%.
罗荣根. 电感耦合等离子体原子发射光谱法测定银中8种杂质元素[J]. 冶金分析, 2014, 34(11): 46-50.
LUO Rong-gen. Determination of eight elements in silver by inductively coupled plasma atomic emission spectrometry. , 2014, 34(11): 46-50.
ISO 15096:2008(E) ISO technical committees. jewellery-Determination of silver in 999 silver jewellery alloys-difference method using inductively coupled plasma optical emission spectroscopy(ICP-OES) [S].
