高等学校化学学报

高等学校化学学报 ›› 1989, Vol. 10 ›› Issue (3): 305.

• 研究简报 • 上一篇    下一篇

动力学分析法研究(Ⅲ)--BKrO3-钒(Ⅴ)-柠檬酸-溴酚蓝体系催化光度法测定痕量钒

张志琪, 薛封和, 姜佩璇   

  1. 陕西师范大学化学系
  • 收稿日期:1987-07-05 出版日期:1989-03-24 发布日期:1989-03-24
  • 通讯作者: 张志琪

Study on the Kinetic Analysis (Ⅲ)--KBrO3-V(Y)-Citric Acid-Bromophenol Blue System for Catalytic Spectrophotometric Determination of Trace Amount of Vanadium

Zhang Zhiqi, Xue Fenghe, Jiang Peixuan   

  1. Department of Chemistry, Shaanxi Normal University, Xian
  • Received:1987-07-05 Online:1989-03-24 Published:1989-03-24

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摘要： 钒对许多均相反应都有催化作用,但利用催化光度法测定痕量钒国内研究较少。作者发现钒(Ⅴ)对稀硫酸介质中溴酸钾氧化溴酚蓝褪色的反应有催化作用,通过条件试验,建立了利用这一新指示反应催化光度法测定痕量钒的方法。

关键词: 催化, 溴酚蓝, 褪色, 活化, 分光光度法

Abstract: A new catalytic spectrophotometric method has been developed for determination of trace amount of vanadium based on oxidation decoloration of bromophenol blue with potassium bromate in sulfuric acid (pH=2.2). Addition of citric acid could advance the sensitivity. The range of determination is 0.001 to 0.50μg/25mL vanadium (V). Combining with the separation technology of ionic exchange, the method was applied to determination of trace amount of vanadium in nature water.

Key words: Catalysis, Bromophenol blue, Decoloration, Activation, Spectropho-tometry

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