电解法生产氯酸盐盐水中硫酸根含量测定方法的探讨

Study on method for determination of rulfate radical in electrolytic chlorate sdution

用抗坏血酸将盐水中的重铬酸根全部还原成三价铬,然后用氯化钡将硫酸根沉淀为硫酸钡,在pH=10左右,过量的氯化钡用EDTA标准滴定溶液滴定,以铬黑T为指示剂,终点敏锐。

The summary uses ascorbic acid and dichromate all valence three chromes,then precipitate the ruifate as the barium rulfate with the barium chloride,in the PH= 10 or so. the barium chloyide of the surfeit uses the EDTA standard titration aqua titration ,with chrome b-lack T for indicator, the terminal point is sharp..