氢氧化钠标准溶液浓度标定方法的比较研究  

Comparison and Study on the Method of Concentration Calibration of Sodium Hydroxide Standard Solution

作　　者：陆子健 李成梁 李帅[1] 王胜臣 李琳[1] Lu Zijian;Li Chengliang;Li Shuai;Wang Shengchen;Li Lin(Capital Medical University)

机构地区：[1]首都医科大学

出　　处：《哈尔滨师范大学自然科学学报》2019年第1期78-83,共6页Natural Science Journal of Harbin Normal University

基　　金：首都医科大学2017年度第二课堂项目

摘　　要：采用了酸碱滴定法和电导滴定法两种方法,利用两种基准物质邻苯二甲酸氢钾和草酸对氢氧化钠标准溶液的浓度进行了标定.对比邻苯二甲酸氢钾和草酸两种基准物,在酸碱滴定法上,二者测定的氢氧化钠标准溶液的平均浓度比较接近,相对标准偏差差异不显著,均符合滴定分析的标定要求.在电导率滴定法上,两种基准物测得的相对标准偏差比酸碱滴定分析法的相对标准偏差均偏大.In this paper, two methods of acid-base titration and conductometric titration were adopted to calibrate the concentration of sodium hydroxide standard solution by using two reference materials, potassium hydrogen phthalate and oxalic acid. Through the comparision for potassium hydrogen phthalate and oxalic acid, in the acid-base titration method, the average concentration of sodium hydroxide standard solution determined by the two methods was close, and the relative standard deviation was not significant, both met the requirements of the titration analysis. In the conductometric titration method, the relative standard deviations of the two reference materials were larger than those of the acid-base titration method.

关 键 词：氢氧化钠 酸碱滴定 电导滴定 草酸 邻苯二甲酸氢钾 

分 类 号：O655[理学—分析化学]