电感耦合等离子体原子发射光谱法测定纯银中镉、铋、铁、铅、锑、钯、硒、碲

样品用硝酸溶解,加入过量盐酸沉淀分离银,过滤后利用电感耦合等离子体原子发射光谱法测定镉、铋、铁、铅、锑、钯、硒、碲,方法检出限分别为:0.0028,0.0075,0.0036,0.011,0.010,0.021,0.0075,0.0039μg/mL;加标回收率为98.1%～114.3%;RSD小于4.2%,方法能同时准确测定镉、铋、铁、铅、锑、钯、硒、碲,满足日常分析要求。

Determination of Cd, Bi, Fe, Pb, Sb, Pd, Se, Te in Silver by Inductively Coupled Plasma Spectrometry

The sample was dissolved by nitric acid. Then silver in the solution was precipated due to the addition of excessive hydrochloric acid and thus separated from the solution. After filtration the contents of cadmium, bismuth, iron, lead, antimony, selenium, tellurium palladium were determined by inductively coupled plasma atomic emission spectroscopy（ICP-AES）. The detection limit of the method for cadmium, bismuth, iron, lead, antimony, selenium, tellurium and palladium were 0.002 8, 0. 007 5, 0. 003 6, 0.011, 0.010, 0.021, 0.007 5, 0.003 9 /lg/mL, respectively. The recoveries range from 98.1% to 114.3~ The relative standard deviation （RSD） is less than 4.2%. The method can be used to simultaneously and accurately determine cadmium, bismuth, iron, lead, antimony, selenium, tellurium and palladium, thus meet the daily analysis requirement.