氢氧化镍中3价镍含量的测定

Determination of nickelic content in Ni(OH)_2

研究并提供了用碘量法测定氢氧化镍中3价镍占总镍元素含量的具体实验方法。研究发现试样溶解是成败的关键,试样溶解时的酸度、所用试样的质量以及所用温度对分析结果有较大的影响。该方法步骤简单,操作简便,经济实用,准确度高,结果可靠。标准偏差≤5.6×10-3(n=8),相对标准偏差大约为0.6×10-2(n=8)。

The specific application of iodimetry to measure the content of nickelic in Ni(OH)2 was studied. The experiments show that the solution of the samples is the key step. Various factors have a large effect on the results, such as pH value of the solution of the samples, the mass of the samples and the temperature. The method is simple operation, easy master, economic, utilitarian, accurate and reliable. The standard deviation of 8 determinations is not more than 5.6×10-3(n=8), relative standard deviation is 0.6×10-2 approximately(n=8).