›› 2018, Vol. 3 ›› Issue (6): 76-78.

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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

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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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