【摘要】 用经典的以酚酞作指示剂测定碳酸钠的方法,终点不稳定;相对误差为1％,甚至更大。讨论了终点不稳定的原因,与实验结果一致。在此基础上提出了使终点稳定的稳流滴定法。分析结果相对误差为0.2％,解决了碳酸钠测定的准确度和重现性问题。更多还原

【Abstract】 Using phenophthalein to make indicator to measure sodium carbonate, the end point is instable. Relative error is 1％, evern is bigger. The work diseused why the end point is instable. The cause is showed no diffence by test. On the base we advanced Stabilizing flowing titrimetric analysis to stabilize end point. Relative error to analyse is 0. 2％, settled accuracy and reappear in measuring sudium carbonate.更多还原