电感耦合等离子体发射光谱法测定银-铟-镉合金中19种微量元素

ICP-AES Determination of Microamounts of 19 Elements in Ag-In-Cd Alloys

取样0.1000 g溶于硝酸中,用稀盐酸沉淀氯化银,溶液定容为10 mL,在上层澄清液中用超声雾化电感耦合等离子体发射光谱法(ICP-AES)测定清液中铝、钙、铬、铁、镁、钼、镍、钛、钡、铋、钴、铜、锂、锰、铅、锡、钒、钇和锌19种微量元素。对分析条件(包括分析谱线的选择,载气流量、试样溶液的硝酸浓度及铟、镉的基体效应等),取样100 mg时,测定范围为20~640μg.g-1。方法的回收率在94%~104%之间,相对标准偏差在2.6%~6.4%之间。

0.100 0 g of the alloy was dissolved in nitric acid and silver in the sample solution was precipitated as AgCl↓.The solution with the precipitate was diluted to 10 mL in a volumetric flask.Nineteen elements(Al,Ca,Cr,Fe,Mg,Mo,Ni,Ti,Ba,Bi,Co,Cu,Li,Mn,Pb,Sn,V,Y and Zn) in micro amounts were determined by ICP-AES in the supernatant layer.Analytical conditions,including choice of analytical spectral lines,flow-rate of carrying gas,concentration of HNO3 of sample solution,matrix effect of indium and cadmium and e...