镀铬或镀锌钝化溶液中硝酸根的快速测定

Rapid Determination of Nitrate in Cr Plating solution or Zn Chromate Treating Solution

本文叙述了镀铬或钝化溶液中硝酸根的快速测定方法。以硫酸肼还原铬酸根,用间苯二酚为显色剂直接比色测定试液中的硝酸根,方法简单快速,对于低含量和高含量硝酸根的试液都获得了较为满意的结果。

A method of rapid determination of nitrate in Cr plating solution or Zn chromate treating solution is stated. Nitrate in the solution is colorimetrically determined directly with chromate being loping with hydrazine sulfate and resorcin used as color developing agent. The method is simple and rapid. Satisfactory results can be obtained for solution containing low or high nitrate.