›› 2018, Vol. 3 ›› Issue (6): 76-78.

• 化学 • 上一篇    下一篇

钌(Ⅲ)-钨酸钠-甲基紫-PVA缔合体系中钌的测定及应用研究

  

  1. (1.大理州祥云县第一中学,云南祥云672100;2.大理大学药学与化学学院,云南大理671000)
  • 收稿日期:2017-10-21 出版日期:2018-06-15 发布日期:2018-06-15
  • 作者简介:余江,中学高级教师,主要从事高中化学教学及研究.
  • 基金资助:

    大理大学教学工程资助项目(JGVI-134)

Determination and Applied Research of Ruthenium in Ruthenium(Ⅲ)-Sodium Tungstate-Methyl
Violet-PVA Associating System

  1. (1. No.1 Middle School of Xiangyun County, Xiangyun, Yunnan 672100, China; 2. College of Pharmacy and Chemistry, Dali
    University, Dali, Yunnan 671000,China)
  • Received:2017-10-21 Online:2018-06-15 Published:2018-06-15

摘要:

在聚乙烯醇(PVA)存在下,钌(Ⅲ)与钨酸钠及甲基紫形成的离子缔合物在580 nm 处产生最大吸收。据此建立了测定钌
(Ⅲ)的光度分析方法,其表观摩尔吸光系数ε=1.966×108 L·mol-1·cm-1,方法的检测范围为2.0~4.5 ng/25 mL。大量存在的常见
离子对钌(Ⅲ)的测定不产生干扰,方法有较好的选择性。该方法用于冶金样品中钌的测定,结果令人满意。

关键词: 钌, 甲基紫, 钨酸钠, 光度法

Abstract:

The ion- associated complex formed by ruthenium, sodium tungstate and methyl violet in the presence of surfactant
polyvinyl alcohol has a maximum absorbance at 580 nm. A sensitive method for determination of Ru(Ⅲ)was developed based on this
reaction. The apparent molar absorption coefficient ε was 1.966×108 L·mol-1·cm-1,with a linear range was 2.0~4.5 ng/25 mL. Other
ions in samples did not interfere the determination of ruthenium(Ⅲ), and this method had excellent selectivity. The method has been
applied to the determination of trace ruthenium in metallurgical samples, and the results are satisfactory.

Key words: ruthenium, methyl violet, sodium tungstate, spectrophotometry

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