硫脲-碘化钾-马钱子碱分光光度法测定矿石中的铋

研究了在柠檬酸存在的硫酸介质中，矿石中的铋与硫脲-碘化钾-马钱子碱络合染色，用三氯甲烷在室温及100r／min条件下震荡4min萃取其络合物．络合物的最大吸收峰位于460nm处，Bi（Ⅲ）含量在0～20μg范围内符合比尔定律，回归方程为Y=0．09967＋0．00586X，相关系数r=0．99964．对伊犁尼勒克铜矿矿石溶液进行7次平行测量，结果表明，矿石中原矿、精矿、尾矿铋的含量分别为O．003％、0．00064％、0．0028％，RSD在0．3％～2．O％之间，摩尔吸光系数分别是5．3139×10^4、5．3464×10^4、5．3514×10^4，回收率在96．44％-96．74％之间，该测量方法简便易行．

Thiourea-potassium Iodide-brucine Spectrophotometric Determination of Bismuth Ore

Studied the presence of citric acid in the medium, and bismuth ores thiourea - potassium iodide - Brucine complex staining with Chloroform at room temperature and under the conditions of 100r/min concussion concussion 4min extraction instrument its complex. Maximum absorption peak of the complex is located at 462 nm wavelength, Bi （Ⅲ） concentration in the range of 0-20~tg Beer＇s law is obeyed, the regression equation is Y=0.09967＋0.00586X, correlation coefficient r is 0.99964. Nileke solution of copper ore to 7 parallel measurements, the results show that the ore （ore, concentrate, railings） in the bismuth content of 0.003%, 0.00064%, 0.0028%. RSD 0.3%-2.0%, and molar absorptivity is 5.3139 × 10^4, 5.3464 × 10^4, 5.3514 × 10^4, the recovery rate from 96.44% to 96.74%, and the measurement method is very simple.