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pH-V双点电位滴定法确定硼酸滴定终点

Determination of end-point in measuring boronic acid using pH-V potentiometric double-point titration

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【作者】 张志伟孙运泉

【Author】 ZHANG Zhi-wei,SUN Yun-quan(School of Chemical Engineering,Shandong University of Technology,Zibo 255049 China)

【机构】 山东理工大学化学工程学院山东理工大学化学工程学院 山东淄博255049山东淄博255049

【摘要】 研究了确定硼酸滴定终点的一种新方法——pH-V双点电位滴定法.只需在化学计量点附近的一定范围内读取两组pH-V数据,便可利用简单的公式计算出滴定终点时所消耗NaOH标准溶液的体积,进一步计算出硼酸含量.回收率为99.68%~99.74%,RSD≤1.7‰.

【Abstract】 A new method for determining the end-point of boronic acid,pH-V potentiometric double-point titration,has been investigated.Only two sets of data near the estimated stoichiometric point were taken.The consumption volume of sodium hydroxide standard solution was calculated by using some simple expressions,and thus boronic acid content was further determined.The recovery of this method was 99.68%~99.74% and the RSD was less than 1.7.

  • 【文献出处】 山东理工大学学报(自然科学版) ,Journal of Shandong University of Technology(Natural Science Edition) , 编辑部邮箱 ,2008年03期
  • 【分类号】O657.1
  • 【下载频次】184
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