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P204萃取剂的应用,已有不少报导。有用于工业生产,也有用于化学分析,但用于硫酸镍原液中锌的测定,尚未见介绍。以往硫酸镍原液中锌的测定,一般采用双硫腙方法.由于原液的含锌较高(2～8gl~(-1)),用双硫腙方法,须将原液稀释1000～2000倍,这就意味着分析过程产生的误差将扩大1000～2000倍,使分析准确度难以得到保证。另者,用双硫腙方法测定锌,须加入氰化钾等掩蔽剂,将导致对环境的污染。出于上述两个原因,我们试验了用P204萃取锌的极谱测定方法。
P204 extractant applications, there are many reports. Used for industrial production, but also for chemical analysis, but for the determination of zinc sulfate in the original liquid, has not yet been introduced. In the past, the determination of zinc in the stock solution of nickel sulfate generally adopted the method of dithizone.Due to the high zinc content of the stock solution (2 ~ 8gl ~ (-1)), the stock solution should be diluted 1000 ~ 2000 times with dithizone method It means that the error generated by the analysis process will be expanded 1000 to 2000 times, making it difficult to guarantee the accuracy of the analysis. In addition, the determination of zinc with dithizone method, to be added to masking agents such as potassium cyanide, will lead to environmental pollution. For these two reasons, we tested the polarographic determination of zinc extracted with P204.