论文部分内容阅读
矿石中铜锌连续测定,一般均用氯化铵-氢氧化铵-溴水分离铁、锰碘量法,它测定铜肯定可得到准确结果:但测定锌则有下列缺点:1.铜干扰锌的测定,滴定铜后需过滤分离碘化亚铜,由于部分亚铜与碘化钾生成碘化亚铜络合物,过滤时并不能将铜完全除尽。2.镉干扰测定,而含锌矿石中,一般均含镉。3.高铁氰化钾-碘化钾-锌的反应不是单一的,除生成K_2Zn_3[Fe(CN)_6]_2外,还生成Zn_2[Fe(CN)_6],计算结果时,换算因素只能由实验确定。4.加入高铁氰化钾后,由于反应速度较慢,需放置5
The determination of copper and zinc in ore continuously, generally using ammonium chloride - ammonium hydroxide - bromine water separation of iron, manganese iodine method, it can determine the exact determination of copper can get accurate results: However, the determination of zinc has the following disadvantages: 1. Copper Interference with zinc The titration of copper need to be filtered after the separation of copper iodide, as part of copper and potassium iodide to generate copper iodide complex, the filter does not completely eliminate copper. 2. Determination of cadmium interference, and zinc ore, generally contain cadmium. 3. The response of potassium ferricyanide-potassium iodide-zinc is not single. In addition to the formation of K_2Zn_3 [Fe (CN) _6] _2, Zn_2 [Fe (CN) _6] determine. 4. After adding high-speed iron potassium cyanide, due to the slow reaction, to be placed 5