电位滴定法标定氢氧化钠标准滴定溶液的研究

Study on Calibration of Sodium Hydroxide Standard Titration Solution by Potentiometric Titration

利用电位滴定仪,建立电位滴定法标定氢氧化钠溶液标准滴定溶液的方法。从滴定模式选择、预加体积和终止体积选择等方面进行方法优化,确定电位滴定法的滴定参数。根据建立的方法对氢氧化钠标准滴定溶液进行标定,验证方法的精密度和准确度。结果表明,电位滴定法标定结果的相对标准偏差为0.029%,利用电位滴定法标定氢氧化钠标准滴定溶液具有较好的准确性。

Using potentiometric titrator,a method for calibrating standard titration solution of sodium hydroxide solution was established.The titration parameters of potentiometric titration are determined by optimizing the method from the aspects of titration mode selection,pre-added volume selection and termination volume selection.According to the established method,the standard titration solution of sodium hydroxide was calibrated to verify the precision and accuracy of the method.The results show that the relative standard deviation of the calibration results of potentiometric titration is 0.029%,the calibration of sodium hydroxide standard titration solution by potentiometric titration has good accuracy.