论文部分内容阅读
准确快速地分析体系中硫酸根的含量在化工生产和科学研究中有着重要的意义。目前较准确的方法首推硫酸钡重量法,但此法耗时费力,在许多情况下不能满足要求。因此,对硫酸根容量分析方法作了许多探讨。大体可分为两类,一类是硫酸钡沉淀滴定法,以氯化钡标准溶液滴定硫酸根,所用的指示剂有四螭基蟛、茜素红S、偶氮氯膦Ⅲ等。另一类是先向体系加入
Accurate and rapid analysis of the sulfate content in the system of chemical production and scientific research is of great significance. At present, the most accurate method to barium sulfate gravimetric method, but this method is time-consuming and laborious, in many cases can not meet the requirements. Therefore, the sulfate capacity analysis methods made many discussions. Generally can be divided into two categories, one is the barium sulfate precipitation titration to standard solution of barium chloride titration sulfate, the indicators used are four 螭 base, alizarin red S, chlorophosphonazo Ⅲ and so on. The other is to first join the system