丁二酮肟分光光度法测定工业电镀废水中镍量

Determination of nickel content in industrial electroplating wastewater by dimethylglyoxime spectrophotometry

摘要:

准确快速测定含镍工业电镀废水中镍的含量，对提升含镍废水的综合利用水平具有重要意义．实验采用丁二酮肟分光光度法对镍含量在1.0%～15.0%的含镍废水中镍进行测定，结果表明测定值与认定值一致，该方法的相对标准偏差为0.15%～0.72%（RSD，n=11），加标回收率93.53%～105.17%．采用实验方法对含镍废水实际样品中的镍进行测定，并与EDTA络合滴定法进行方法对照试验，两种方法的测定结果相吻合．因此，丁二酮肟分光光度法重复性好、精密度较高、测得结果准确可靠，能满足分析要求．

Abstract:

A variety of recyclable metallic elements (such as nickel) are associated with industrial electroplating wastewater. Therefore, accurate and rapid determination of nickel content in nickel-containing electroplating wastewater is of great significance for improving the comprehensive utilization of nickel-containing wastewater. In the experiment, diacetylgyoxime spectrophotometry was used to determine the amount of nickel in nickel-containing wastewater with a nickel content of 1.0% to 15.0%. The results show that the measured values are consistent with the certified values. The relative standard deviation of this method is 0.15% to 0.72% (RSD, n=11), and the recoveries for standard addition is 93.53% to 105.17%. The experimental method was used to determine the nickel in the actual sample of nickel-containing wastewater, and the method was compared with the EDTA complex titration method. The results of the two methods were consistent. Therefore, the diacetylgyoxime spectrophotometry method has good repeatability, high precision, accurate and reliable measurement results, and can meet the analysis requirements.