【摘 要】
：
选择了常量Ni、Co共存时络合滴定单独测Ni的一些条件。100ml溶液中可允许20mg Co与Ni共存,较文献报导范围宽得多,氧化剂(NH_4)_2S_2O_8无需破坏除尽,在氨性介质中加NaF掩蔽使
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选择了常量Ni、Co共存时络合滴定单独测Ni的一些条件。100ml溶液中可允许20mg Co与Ni共存,较文献报导范围宽得多,氧化剂(NH_4)_2S_2O_8无需破坏除尽,在氨性介质中加NaF掩蔽使9mg Ca、Mg,10mgAl,20mgFe~(3+)不干扰测定。方法较快速、简便;样品分析表明与丁二肟镍分离法结果较满意地符合,精密度亦可。
Some conditions for the determination of Ni by complexometric titration under constant coexistence of Ni and Co were selected. 20mg Co and Ni coexist in 100ml solution, which is much wider than the reported range in the literature. The oxidant (NH_4) _2S_2O_8 does not need to be destroyed completely. NaF masking in ammoniacal medium can make 9mg Ca, Mg, 10mgAl, 20mgFe ~ (3+ ) Does not interfere with the assay. The method is rapid and simple, and the sample analysis shows that the results of the separation with butadixin are more satisfactory and the precision is also acceptable.
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