全自动电位滴定法测定混凝土中酸溶氯离子含量  

DETERMINATION OF ACID-SOLUBLE CHLORIDE ION IN CONCRETE BY AUTOMATIC POTENTIOMETRIC TITRATION

作　　者：吴双九[1] 徐晓云[1] 杨竞[1] 

机构地区：[1]中冶集团建筑研究总院建筑工程检测中心,北京100088

出　　处：《化学分析计量》2009年第2期27-29,共3页Chemical Analysis And Meterage

摘　　要：采用全自动电位滴定仪测定混凝土中氯离子含量,研究了实验相关影响因素。实验结果表明,pH值和AgNO3溶液浓度对试验结果无显著影响,在水溶液中加入乙醇有利于提高终点电位突跃,该方法加标回收率为96.9%～98.7%,测量结果的相对标准偏差为2.74%(n=6)。Acid-soluble chloride ion content in concrete was determined by automatic potentiometric titrator,and the influence factors of the method were studied. The detection results indicated that pH and the concentration of AgNO3 had non-significant influence on the titration result,and the titration curve jump was enhanced in water-ethanol solvent. The recovery was 96.9%-98.7%,and the relative standard deviation of detection results was 2.74%(n=6). The measurement method has high accuracy and good repeatability.

关 键 词：混凝土 氯离子 自动电位滴定法 

分 类 号：TU528.01[建筑科学—建筑技术科学]