库仑滴定法测定水泥中硫酸盐三氧化硫含量的研究

Determination of Sulfate Sulfur Trioxide in Cement by Coulometric Titration

对比了库仑滴定法和硫酸钡重量法测定水泥中硫酸盐三氧化硫的结果;分析了库仑滴定法调节电位平衡适用的试样;研究了库仑滴定法电解液中冰乙酸加入量对测定结果的影响。结果表明,与硫酸钡重量法相比,库仑滴定法用时较短,火柴头和煤样可用于调节库仑滴定法所用电解液的电位平衡,电解液中冰乙酸的加入量不应>30 mL。

This paper compares the results of coulometric titration and barium sulfate gravimetric method in the determination of sulfate sulfur trioxide in cement,analyzes the samples suitable for adjusting potential balance by coulometric titration,and studies the influence of the amount of glacial acetic acid in the electrolyte of coulometric titration on the determination results.The analysis shows that compared with barium sulfate gravimetric method,the time of coulometric titration is shorter,match head and coal sample can be used to adjust the potential balance of electrolyte used in coulometric titration,and the amount of glacial acetic acid in electrolyte should not be more than 30 ml.