摘要
控制混合碱分析其它条件完全相同,仅改变第一滴定终点的确定方法,分别采用双指示剂法和pH计法分析混合碱标准溶液,测定结果与标准溶液真值进行比较,判断测定方法准确度高低,优化混合碱分析方法.实验证明,采用pH计法可准确判断第一滴定终点,并可使混合碱分析中Na2CO3含量准确度提高4倍,NaHCO3含量准确度也有提高.
Only change the condition for determining the end of the first titration and control the other conditions to be identical.We use the double-indicator and pH meter to analysis the mixed alkali solution and compare the resuh with the true value of the standard solution to evaluate the accuracy of the method.Then we can optimize the mixed alkali method.The result shows that the pH meter method can accurately determine the the titration end point,and could improve the accuracy of the Na2C03 content by four times and the NaHC03 content by many times in the mixed alkali.
出处
《河南科技学院学报（自然科学版）》
2012年第4期67-70,共4页
Journal of Henan Institute of Science and Technology(Natural Science Edition)
基金
河南省教育厅项目(2012SJGLX308)
关键词
混合碱
测定
准确度
PH
mixed alkali
measurement
accuracy
pH meter
