CAJ | 학술논문

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.
보도료일충기우형광내려효응적형광증강형리리자광화학전감기, 장형광시제、친지성pH지시제화리리자중성재체결합재증소적PVC막중, Li+여H+재막상중적경쟁췌취효응인기수친지성pH지시제조제적민감막형광치적변화. 추도료유관이론관계식, 연구료해전감기적향응특성, 병대인공합성양품진행측시, 결과교위만의.
In this paper, an optical chemical sensor of fluorescence enhancement for lithium ion has been developed on the basis of ion-exchange sensing scheme. A suitable fluorescent agent is incorporated in the plasticized PVC membrane 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 pH 9.0, the fluorescence response of the excellent sensor shows a good correlation with the theoretically derived formula in the linear range from 5.0×10-4 to 5.0×10-1 mol/L with a detection limit of 5.0×10-5 mol/L lithium ion. The response time is about 1 min.