一、前言分光光度萃取滴定是一种包括滴定、萃取和分光光度测定的联合分析技术,它比这三种方法中任何单一的方法都灵敏。萤光分光光度萃取滴定要用萤光测量代替一般的分光光度法测量,此种方法尚未研究过。因为萤光法具有较高的灵敏度,并光强度与浓度之间直接成线性关系,而不是像分光光度法那样成对数关系,所以萤光分光光度萃取技术可用于测量少量和低浓度样品中的微量成份。导出了萤光法的滴定曲线的理论方程,并与实验数据作了比较。滴定终点的数学计算也从理论上导出,并用8——羟基喹啉滴定镓和铝的实验做了验证。二、理论 I. INTRODUCTION Spectrophotometric extraction titration is a combined analysis technique including titration, extraction and spectrophotometry that is more sensitive than any single method of the three methods. Fluorescence spectrophotometric titration using fluorescence instead of general spectrophotometric measurement, this method has not been studied. Because of the high sensitivity of the fluorescence method and the direct linear relationship between light intensity and concentration, rather than as a logarithmic relationship as spectrophotometry, the fluorescence spectrophotometric extraction technique can be used to measure small and low concentrations of samples Trace ingredients. The theoretical equation of the titration curve of the fluorescence method was derived and compared with the experimental data. The mathematical calculation of the end point of the titration was also theoretically derived and verified by the experiments of gallium and aluminum titration with 8-hydroxyquinoline. Second, theory