异烟酸-吡唑啉酮显色液的改进

The Improvement of Isonicotinic acid - pyrazolone color liquid

本文对异烟酸-吡唑啉酮光度法测定水和废水中氰化物的方法进行了改进，在不改变其它步骤的前提下，以去离子水代替二甲基甲酰胺所配得的吡唑啉酮溶液及异烟酸溶液作为显色剂。试验结果表明：改进后新方法的精密度RSD〈5％，加标率回收率为92．0—105．0％，通过电镀废水和标准样品的比对试验表明，改进后的方法与标准方法对同一样品的测定结果无显著性差异，满足监测分析要求。

It improve that determination of cyanide in water and wastewater by isonicotinic acid - pyrazolone spectrophotometric methods in this paper. Under the premise of without changing the other steps, With deionized water instead of dimethylformamide as worthy of the pyrazolone solution and iso-nicotinic acid solution as a chromogenic agent. The results showed that：The new method improved the precision RSD 〈5%, plus standard rate of recovery was 92.0 - 105.0%.Eleetroplating wastewater and standard sample by comparison of the tests showed. The improved methods and standard methods for the determination of the same sample was no significant difference. To meet the monitoring and analysis requirements.