离子色谱法测定拜耳法铝酸钠溶液中的杂质离子

Determination of the Impurity Ions in Bayer Sodium Aluminate Solution by Ion Chromatography

采用Metrohm-883型离子色谱仪、ASUPP7-250分离柱,等度淋洗条件下,一次性分离氧化铝生产铝酸钠溶液中的F-、Cl-、SO42-、C2O42-、甲酸根、乙酸根等离子,该方法简便易行,分析结果准确可靠,线性相关系数均>0.9998,检出限<0.019μg/mL,样品测定的相对标准偏差<2.3%,加标回收率98.9%～102.3%。

Using Metrohm-883 ion chromatograph with ASUPP 7-250 separation column and isocratic elution condition,we detected the F-,Cl-,SO42-,C2O42-,formate and acetate etc in Bayer aluminum sodium solution one-timely.The method was simple,the results were accurate and reliable,the linear correlation coefficient were more than 0.999 8,the detection limits were less than 0.019 μg/mL,the relative standard deviations were less than 2.3% and the recoveries were between 98.9% and 102.3%.