中华医学超声杂志

应用化学 ›› 1996, Vol. 0 ›› Issue (1): 104-106.

• 研究简报 • 上一篇    下一篇

经巯基葡聚糖凝胶分离富集的痕量铁的催化动力学光度法测定

崔丽君, 李慧芝, 徐广通, 申晓峰   

  1. 山东建筑材料工业学院应用化学系 济南 250022
  • 收稿日期:1995-06-13 修回日期:1995-10-17 出版日期:1996-02-10 发布日期:1996-02-10

Catalytic-Kinetic Spectrophotometric Determination of Trace Iron(Ⅲ) after Separation and Concentration by Mercapto-Containing Dextran Gel

Cui Lijun, Li Huizhi, Xu Guangtong, Shen Xiaofeng   

  1. Department of Applied Chemistry, Shandong Institute of Building Materials, Jinan 250022
  • Received:1995-06-13 Revised:1995-10-17 Published:1996-02-10 Online:1996-02-10

PDF

414

被引次数

1

摘要： 用催化动力学方法测定痕量元素的报道日渐增多,对铁的测定已有报道[1-3],在硫酸介质中,痕量铁具有强烈催化高碘酸钾氧化偶氮肿l使之褪色的作用,本体系是目前测定痕量铁的最灵敏的方法之一.

关键词: 催化动力学光度法, 巯基葡聚糖凝胶, 铁(Ⅲ)

Abstract: Trace Fe(Ⅲ) catalyzes the discoloring oxidation reaction of arsenazo Ⅲ by potassium periodate(KIO4) in sulfuric acid medium.The kinetic conditions have been studied in detail.A new method of kinetic spectrophotometry for the determination of trace Fe(Ⅲ) is established.The sensitivity of method is 8 ng/L.The range of measurement is 0～0.06mg/L Fe(Ⅲ).The coexisting metal ions can be separated by mercapto-containing dextran gel.This method has been applied to the determination of trace iron(Ⅲ) in water and human hair samples with satisfactory results.

Key words: catalytic-kinetic spectrophotometry, mercapto-containing dextran gel, iron (Ⅲ)

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