氯氧镁胶凝材料中总氯离子的测定:(Ⅱ)分析方法的比较与评价

Method of Detecting Chloride Ion in Magnesium Oxychloride Cement

中文关键词:  氯氧镁胶凝材料  氯离子(Cl-)  Volhard法  测定

英文关键词:Magnesium oxychloride cement(MOC)  Chloride ion(Cl-)  Volhard method  Determination  

中文摘要:

      氯氧镁胶凝材料中的总Cl-含量是衡量产品吸潮、返卤和泛霜性能的关键指标之一.分别用重量法、CNS14164方法以及用甘油保护沉淀和过滤分离沉淀的Volhard法测定了5个MOC样品中的总Cl-含量；并以重量法的测定结果为基准,比较和评价了其余3种分析方法.结果表明,CNS 14164方法主要由沉淀转化引起负误差,该方法受随机误差的影响较大；用甘油保护沉淀后,测定的精密度和准确度提高,测定结果的相对误差为-0.24％,该方法可替代CNS14164方法；过滤分离沉淀后,分析结果受随机误差的影响较小,但该方法存在较大的系统误差,测定结果的相对误差为1.43％.

英文摘要:

      Chloride ion(Cl-)content is one of the key indicators of deliquescence,dehalogenation and efflorescence in the Magnesium Oxychloride Cement(MOC).In this work,the Cl-content in MOC was detecting by four methods:gravimetric method and volhard method for no-isolating and no-filtering,isolating by glycerol and filtering of AgCl.Comparisons of results obtained by the three different methods of volhard method with those obtained by the gravimetric method of Cl-were carried out for five MOC specimens from factory....