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化学学报
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化学学报 ›› 2010, Vol. 68 ›› Issue (11): 1098-1102. 上一篇    下一篇

研究论文

基于光纤折射率传感原理的新颖酸碱滴定法

黄振健，谭春华，黄旭光   

  1. 华南师范大学光子信息技术广东省高校重点实验室 广州 510006
  • 投稿日期:2009-10-22 修回日期:2009-12-18 发布日期:2010-01-14
  • 通讯作者: 黄旭光 E-mail:huangxg@scnu.edu.cn
  • 基金资助:

    广东省科技计划项目（No. 2009 B090300190）

A Novel Acid-base Titration Based on Fiber Refractive Index Sensor Principle

HUANG Zhen-Jian, TAN Chun-Hua, HUANG Xu-Guang   

  1. Laboratory of Photonic Information Technology, School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006
  • Received:2009-10-22 Revised:2009-12-18 Published:2010-01-14
  • Contact: Xuguang Huang E-mail:huangxg@scnu.edu.cn

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966

被引次数

3

首次提出并研究了一种基于光纤折射率传感原理的新颖的化学酸碱滴定分析方法, 为光纤传感技术在化学滴定分析的新应用作出了有意义的尝试. 实验结果表明: 此方法适应于酸碱互滴, 只需少量样品; 在待测样品浓度较低时, 采用浓度高的滴定剂效果更佳, 可测量浓度低至0.001 mol/L 的溶液; 与传统的pH滴定方法等比较, 本方法无需添加终点指示剂, 可实现实时监控; 在二元酸碱的滴定中, 化学计量点指示更明确, 精度更高; 稳定性和准确性测试效果良好, 对HNO3, NaOH进行测定RSD分别为0.23%和0.28%.

关键词: 光纤传感, 折射率, 酸碱滴定, 化学分析

A novel acid-base titration based on fiber refractive index sensor principle is first proved and studied in this paper. It is a significant attempt for the optical fiber sensing technology application to chemical titration analysis. The experimental results show that this method is adapted to titration acids with bases and vice versa, and requires very small sample volumes. It is suitable that concentrated solution used to be the titrant when the sample is diluted solution. By adopting this method, the solution of 0.001 mol/L can be measured accurately. Compared to the traditional pH titration, end point indicator is unnecessary in this method, and real-time monitoring can be realized. In titration binary acid/base with base/acid, the end point is more explicit and higher accuracy can be obtained. The RSD of measurement of HNO3, NaOH is 0.23% and 0.28% respectively, which show that text results of repeatability and accuracy is satisfactory.

Key words: fiber sensor, refractive index, acid-base titration, chemical analysis