单柱离子色谱法分离测定镀铬液中的硫酸根

Determination of sulfate in chromium-plating Bath by Single-Column Ion Chromatography

本法采用单柱离子色谱系统、在样品中存在大量铬酸根的情况下．以４．０ｍｍｏｌ／Ｌ邻苯二钾酸氢钾作为淋洗液．能简单快速地测定镀铬液中的硫酸根．线性范围为１．４～１５０ｍｇ／Ｌ，最低检出浓度为０．０７ｍｇ／Ｌ，相对偏差为０．３１％。

An single-column ion chromatrography method for determining sulfate in chromium-plating bath is desctihed.4.0 mmol/L potassium biphthalate was used as an eluent for determination of sulfate in the presence of a large comcentration of chromate.The linear limit for the method is between 1.4-150mg/L with the detection limit of 0.07 mg/L for sulfate and the relative standard deviation is 0.31%.