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刘彦明, 刘斌, 杨宇. Fe~(3+)、Fe~(2+)的连续测定[J]. 信阳师范学院学报(自然科学版), 1999, 12(3): 290-292.
引用本文: 刘彦明, 刘斌, 杨宇. Fe~(3+)、Fe~(2+)的连续测定[J]. 信阳师范学院学报(自然科学版), 1999, 12(3): 290-292.
shu
LIU Yan ming, LIU Bin, YANG Yu. Continuous determination of iron(Ⅲ) and iron(Ⅱ)[J]. Journal of Xinyang Normal University (Natural Science Edition), 1999, 12(3): 290-292.
Citation: LIU Yan ming, LIU Bin, YANG Yu. Continuous determination of iron(Ⅲ) and iron(Ⅱ)[J]. Journal of Xinyang Normal University (Natural Science Edition), 1999, 12(3): 290-292.
shu

Fe~(3+)、Fe~(2+)的连续测定

Continuous determination of iron(Ⅲ) and iron(Ⅱ)

    摘要
  • 摘要: 在强酸性溶液中，Ｆｅ３＋ 和Ｆｅ２＋ 共存，以磺基水杨酸作指示剂，用ＥＤＴＡ 滴定Ｆｅ３＋ ，终点由紫红色突变至亮黄色。然后加入Ｈ２Ｏ２ 氧化Ｆｅ２＋ ，继续用ＥＤＴＡ 滴定至终点由黄绿色至亮黄色，实现了Ｆｅ３＋ 、Ｆｅ２＋ 的连续测定。

     

    Abstract: In the strong acid solution,Fe 2+ co-existing with Fe 3+ ,sulfosalicylic acid as indictor,the Fe 3+ was titrated by sodium ethylenediamine tetracetate, meanwhile the colour of ending point in titration varies from purgle red to bright yellow.After adding hydrogen peroxide,Fe 2+ was oxidized to Fe 3+ and titrated by sodium ethylenediamine tetracetate continuously.

     

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