摘要
探讨了银电极电位滴定法测定酱油中氯化钠含量，结果是：两种添加浓度的方法回收率都大于９８％。同一样品测定１０次，标准偏差为０．１３，ＣＶ％＝０．８４．本法不受样品色泽干扰，终点突跃范围宽，灵敏、准确，是替代指示剂法的理想方法。
This paper studied the determination of sodium chloride content in soy sauce by thepotentiometric titration of silver electrode.The method recoveries were greater than 98%,Whenthe same sample was determined ten times,the standard deviation and CV%was 0.13 and 0.84,re-spectively,This method has higher a sudden leap of potential at the end point of titration,sensitivi-ty and accuracy,and can replace the Mohr method successfully.
关键词
酱油
氯化钠
电位滴定法
soy sauce
sodium chloride
potentiometric titration
