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从锡渣中提取钽,已逐渐为冶金工作者所注目。但是,锡渣中钽的测定,通常采用重量法和比色法,这些方法须事先进行铌钽纸上色层分离,分析流程长达十数小时,而且对低含量钽的测定比较困难。我们应用张国雄等研制的钽离子选择性电极对测量体系的选择等作了系统的探讨,进而提出了氢氟酸-硝酸分解试样,在0.6N氢氟酸-0.9N硫酸中直接测定钽的方法。该法简单、快速,测定下限为2.5×10~3％,相对标准偏差在10％以内。用于实际试样分析,结果满意。一、试剂及仪器氢氟酸,硫酸均为优级纯,硝酸以蒸馏提纯。
Extraction of tantalum from tin slag, metallurgy workers have gradually attracted the attention. However, tantalum in tin dross is usually measured by gravimetric method and colorimetric method. These methods must be preceded by tint layer separation of niobium tantalum paper, the analysis process is up to several hours, and the determination of low tantalum is more difficult. We use Zhang Guoxiong and other tantalum ion selective electrode system for the selection of measurement systems were discussed, and then put forward hydrofluoric acid - nitric acid decomposition of the sample, 0.6N hydrofluoric acid -0.9N sulfuric acid in the direct determination of tantalum Methods. The method is simple and rapid, the determination of the lower limit of 2.5 × 10 ~ 3%, the relative standard deviation of less than 10%. For the actual sample analysis, the results are satisfactory. First, reagents and equipment Hydrofluoric acid, sulfuric acid are excellent pure, nitric acid to distillation purification.