电位法基体效应在氟离子选择性电极分析中的影响  

Matrix Effects in Potentiometric Method on Fluoride Selective Electrode Analysis

作　　者：赵玲丽 张嘉捷[1] 徐孝菲 习玲玲[1] 委育秀[1] 唐云湖[1] 林旭锋[1] Lingli Zhao;Jiajie Zhang;Xiaofei Xu;Lingling Xi;Yuxiu Wei;Yunhu Tang;Xufeng Lin(Department of Chemistry,Zhejiang University,Hangzhou 310012,China)

机构地区：[1]浙江大学化学系,杭州310012

出　　处：《大学化学》2023年第8期200-208,共9页University Chemistry

基　　金：浙江大学一流本科专业综合改革项目;浙江大学化学系第十七期教改项目。

摘　　要：为了在化学实验课程中拓展学生的理论知识视野并深化学生对电位法基体效应的理解,开展了针对基于氟离子选择性电极的电位法基体效应的实验探究。以梯度方式向标准溶液中掺杂乙醇或乙酸模拟不同程度的复杂基体,对基于氟离子选择性电极的电位法基体效应的影响展开了深入系统的实验验证与理论探讨,在不同基体中对测定氟离子含量的标准曲线法和标准加入法进行了研究比较。实验结果阐明了电位法基体效应的影响以及不同定量分析方法的特点,有助于学生深刻理解实验原理,启发学生科研思维,提升实验教学效果。Experiments on matrix effects in the fluoride selective-electrode-based potentiometric methods were performed to expand students’theoretical knowledge and deepen their understanding of matrix effects in the potentiometric method in the chemistry laboratory course.Complex matrices were simulated by doping ethanol or acetic acid gradiently into a standard solution.Comprehensive and systematic empirical verification and theoretical analysis of the matrix effects were conducted.Moreover,the standard curve and addition methods determining fluoride in different matrices were investigated and compared.The experimental results showed the matrix effects and the characteristics of the different quantitative analysis methods.This study provides students with an enhanced sense of experimental principles and expands their scientific thinking,which eventually helps achieve improved teaching and learning.

关 键 词：基体效应 电位法 离子选择性电极 标准曲线法 标准加入法 

分 类 号：G64[文化科学—高等教育学] O652[文化科学—教育学]