气体容量法测定水玻璃砂中碳酸盐含量

发布时间：2018-05-24 00:26

本文选题：水玻璃砂 + 碳酸盐　；参考：《冶金分析》2015年05期

【摘要】：水玻璃再生砂中的碳酸盐对其性能有较大影响,需进行定量分析。用0.50mol/L盐酸分解10~50g试样后,用量气管收集并测量反应生成的二氧化碳气体体积,反应时间控制在18min以上,当量气管液面高度在3~5min内不变时为反应终点,根据二氧化碳气体体积计算碳酸盐含量,建立了气体容量法测定水玻璃砂中碳酸盐含量的方法。方法用于水玻璃砂模拟样品中碳酸盐含量的测定,测定值与理论值一致,相对标准偏差在0.20%~0.80%之间;用于水玻璃旧砂和再生砂中碳酸盐含量的测定,测得结果与滴定法基本吻合,相对标准偏差不大于0.91%。
[Abstract]:The carbonate in the reclaimed sodium silicate sand has a great influence on its properties, which need to be analyzed quantitatively. After decomposing 1050g sample with 0.50mol/L hydrochloric acid, the volume of carbon dioxide gas produced by the reaction was collected and measured by the amount of trachea, the reaction time was controlled above 18min, and the equivalent level of trachea was the end point of the reaction when the height of the equivalent trachea liquid level was invariable in 3~5min. The method of determining carbonate content in sodium silicate sand by gas volumetric method was established according to the calculation of carbonate content by carbon dioxide gas volume. The method has been applied to the determination of carbonate content in the simulated samples of sodium silicate sand, and the measured values are consistent with the theoretical values, the relative standard deviation is between 0.20% and 0.80%, and the results obtained for the determination of carbonate content in the old and recycled sodium silicate sand are in good agreement with the titration method. The relative standard deviation is not greater than 0.91.
【作者单位】：武汉纺织大学机械与自动化学院;
【基金】：国家自然科学基金青年基金项目(51405348) 湖北省自然科学基金面上项目(2014CFB350) 武汉纺织大学校基金重大项目(123005) 湖北省大学生创新创业训练计划项目(2013CXZD038)
【分类号】：TQ177.4;TG22

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