高岭土中全硫量快速测定方法

Rapid Method for the Determination of Total Sulphur Content in Kaolin

摘要: 采用碳酸钠一氧化镁半熔融一氯化钡滴定法测定高岭土中的硫含量。试样用碱性熔荆半熔，熔块以水浸取，将转化为硫酸盐后的滤液，以玫瑰红酸钠为指示剂，在pH为5．5．7．0的条件下，用氯化钡标准溶液进行滴定。测定结果的RSD=2．47％（n=5），加标回收率为95．2％-100．3％。改进后的方法已用于高岭土中全硫量的测定，结果与国标重量法相符。

Abstract: A method for the determination of total sulphur content in kaolin samples by titrimetry was reported in this paper.Samples were semi-melted with Na_2CO_3+MgO.The melt was then soaked with water and the solution was filtered.Sulphur(in SO~(2-)_4 form) in t