芒硝中硫酸钠含量的快速测定  

RAPID DETERMINATION OF SODIUM SULFATE CONTENT IN MIRABILITE BY PRECIPITATION ANALYSIS.

作　　者：钟国清[1] 

机构地区：[1]四川畜牧兽医学院基础部,重庆荣昌402460

出　　处：《无机盐工业》2001年第4期43-44,共2页Inorganic Chemicals Industry

摘　　要：报道了用沉淀滴定法测定芒硝中硫酸钠的含量 ,在pH值为 1～ 2的硝酸介质中 ,以 80 %的乙醇作溶剂 ,偶氮氯膦Ⅲ为指示剂 ,用氯化钡标准溶液进行滴定。本法测定结果与重量法结果很吻合 ,标准偏差和变异系数均小于 0 2 % ,终点变色敏锐 ,具有快速、简便。Determination of content of sodium sulfate in mirabilite by precipitation analysis has been reported.Sodium sulfate is titrated with barium chlorate as standardized solution in the medium of pH=1～2 HNO 3,with 80% ethanol as solvent and chlorophosphonazo Ⅲ as indicator.The results are quite agreeable with those by gravimetric analysis.The standard deviation and coefficent of variation are all less than 0.2%.The method is rapid,simple,accurate and the discolouration of destination is sharp.

关 键 词：硫酸钠 测定 沉淀滴定法 偶氮氯磷Ⅲ 芒硝 

分 类 号：TQ131.12[化学工程—无机化工]