Determination of boron trifluoride in boron trifluoride complex by fluoride ion selective electrode

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• 作者：Wuke Lang 郎五卿/a> ; Weijiang Zhang 张卫毿/a> ; Yin Tang 咿鑿/a>…
• 关键词：boron trifluoride complex ; fluoride ion selective electrode ; sodium hydroxide ; aluminum chloride
• 刊名：Transactions of Tianjin University
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：22
• 期：1
• 页码：83-88
• 全文大小：519 KB
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• 作者单位：Wuke Lang 郎五可 (1) (2)
  Weijiang Zhang 张卫江 (1)
  Yin Tang 唐 银 (1)
  Jiao Xu 徐 姣 (1)
  Lei Zhang 张 雷 (3)
  
  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China
  2. College of Chemistry and Life Science, Weinan Normal University, Weinan, 714099, China
  3. School of Pharmaceutical Engineering, Shenyang Pharmaceutical University, Shenyang, 110016, China
  
• 刊物类别：Engineering
• 刊物主题：Chinese Library of Science
  
• 出版者：Tianjin University
• ISSN：1995-8196

文摘

A method was proposed to determine boron trifluoride in boron trifluoride complex using fluoride ion selective electrode(ISE). Hydroxide was chosen to mask aluminum for the determination of 0.01—0.1 mol/L of fluoride. The simulation indicated that the permissible aluminum masked at a certain pH value was limited and hardly related to F-concentration and boric acid. It is better to control pH value below 11.5 and the aluminum concentration within 0.025 mol/L to minimize the interference of hydroxide to the fluoride ISE. The decomposition conditions of boron trifluoride by aluminum chloride were investigated. It is found that the F-detection ratio will approach 1.0 if the Al/F molar ratio is 0.3—0.7 and aluminum concentration is no more than 0.02 mol/L when heated at 80 °C for 10 min. In one word, hydroxide is quite fit to mask aluminum for samples which contain high content of fluoride and aluminum and the BF3 content can be successfully determined by this method.