返滴定法确定混合碱第一计量点的探讨  

Determination of the first equivalence point of the mixed bases by back titrimetric method

作　　者：阎俊英[1] 

机构地区：[1]河北师范大学化学系,河北石家庄050091

出　　处：《商丘师范学院学报》2001年第6期85-87,共3页Journal of Shangqiu Normal University

摘　　要：采用滴定剂HCl稍过量 ,NaOH标准溶液返滴定过量HCl的方法 ,较准确地确定混合碱第一计量点 .并通过分光光度测定 ,对该法进行了对比验证 .通过实际样品测定 ,滴定误差均在 0 5 %以下 .A back titrimetric method was used to accurately determine the first measurement point of the mixed bases.In the method,a standard solution of sodium hydroxide was used to titrate the little excess standard hydrochloric acid.The contrast experiment was studied by spectrophotometry.Experimental results of the determination for real samples showed that the titration error was less than 0.5%.

关 键 词：返滴定 分光光度法 混合碱分析 第一计量点 

分 类 号：O655.23[理学—分析化学]