水相电位滴定法测定无水乙酸钠含量

Determination of the content of sodium acetate anhydrous by aqueous potentiometric titration method

将无水NaAc配成水溶液,用自动电位滴定仪,以DETU滴定模式水相滴定法快速准确分析无水NaAc主体含量。结果表明,无水NaAc溶液浓度为0.1000mol.L-1时,滴定结果与国家标准方法分析结果基本一致,允许误差小于0.2%;标准偏差为0.030~0.057,相对标准偏差为0.030%~0.057%。

The anhydrous sodium acetate is prepared into water solution,The main content of anhydrous sodium acetate was determined by DETU aqueous titration method with automatic potentiometric titration.The results show that,anhydrous sodium acetate solution concentration was 0.1000 mol·L-1,GB/T titration and 694-1995 analysis results are basically consistent,allowable error is less than 0.2%;the standard deviation was 0.030~0.057,the relative standard deviation is 0.030%~0.057%.