摘要：

用常规法测定成品稳定态二氧化氯的杂质，常有干扰。用蒸馏-滴定法，在H₂SO₄等酸性溶液中，将ClO₂蒸出，吸收于KI溶液中，再用Na₂S₂O₃标准溶液滴定析出的碘，可迅速、方便地测定稳定态二氧化氯。该法NaClO₃和NaClO₂杂质无干扰。同时对蒸馏时酸的选择、蒸馏时间、吸收液酸度与反应所需时间及方法的重现性进行了比较。

关键词: 二氧化氯, 分析, 蒸馏-滴定

Abstract:

The final product of stable chlorine dioxide collected contains some interfering substances for determining its concentration with ordinary method.A distillation-titration method has been developed.Chlorine dioxide is distilled from H₂SO4 solution and absorbed by KI solution.Then yield I₂ is determined with Na₂S₂O₃.NaClO₃ and NaClO₂ have no interferance.The concentration of stable chlorine dioxide can be determined rapidly and conveniently.The choice of acid,time of distillation,pH of the solution and the repetition rate of this method are discussed.

Key words: chlorine dioxide, analysis, distillation-titration

中图分类号: 

• TQ124.4+3