高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (2): 191.

• 研究论文 • 上一篇    下一篇

基于荧光内滤效应的锂离子荧光化学传感器研究

仲敬荣1, 刘妙根1, 敖冰云1, 羊小海2, 王柯敏2, 肖丹2   

  1. 1. 中国工程物理研究院, 绵阳 621900;
    2. 湖南大学化学化工学院, 长沙 410082
  • 收稿日期:2000-01-12 出版日期:2001-02-24 发布日期:2001-02-24
  • 通讯作者: 王柯敏(1957年出生),男,博士,教授,博士生导师,从事光化学传感器研究.
  • 基金资助:

    中国工程物理研究院科学基金(批准号:98050727)资助

A Lithium Ion-selective Optical Chemical Sensor Based on the Inner-filter Effect of Fluorescence

ZHONG Jing-Rong1, LIU Miao-Gen1, AO Bing-Yun1, YANG Xiao-Hai2, WANG Ke-Min2, XIAO Dan2   

  1. 1. Chinese Academy of Engineering Physics, Mianyang 621900, China;
    2. College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China
  • Received:2000-01-12 Online:2001-02-24 Published:2001-02-24

摘要: 报道了一种基于荧光内滤效应的荧光增强型锂离子光化学传感器,将荧光试剂、亲脂性pH指示剂和锂离子中性载体结合在增塑的PVC膜中,Li+与H+在膜相中的竞争萃取效应引起受亲脂性pH指示剂调制的敏感膜荧光值的变化.推导了有关理论关系式,研究了该传感器的响应特性,并对人工合成样品进行测试,结果较为满意.

关键词: 荧光内滤效应, 锂离子, 光化学传感器

Abstract: In this paper, an optical chemical sensor of fluorescence enhancement for lithium ion has been developed on the basis of ion-exchange sensing scheme. Asuitable fluorescent agent is incorporated in the plasticized PVCmembrane containing a lipophilic pH-indicator and lithium-selective neutral ionophore. Fluorescence varies as a function of the varying absorption of the pH-indicator, which in turn is modulated by the lithium concentration through the inner-filter effect of fluorescence. The response performance of the sensors and their theoretical response equations are reported. At pH9 0, the fluorescence response of the excellent sensor shows a good correlation with the theoretically derived formula in the linear range from 50×10-4 to 50×10-1 mol/Lwith a detection limit of 50×10-5 mol/Llithium ion. The response time is about 1 min.

Key words: Inner-filter effect of fluorescence, Lithium ion, Optical chemical sensor

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