摘要
研究了采用玫瑰红酸钠-氯化钡容量滴定法快速测定煤中的硫含量.样品用碱性熔剂半熔,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=5.5-7.0的条件下,用氯化钡标准溶液进行滴定.结果表明,改进后的方法操作简单、测定快速、准确度高、干扰小,其测定结果的相对标准偏差（RSD）为0.31%,加标回收率（R）为96.4%-100.8%.
A method of determining the total sulphur content in the coal by titrimetry of semimelting and barium chloride is tested and researched. Sample was semi-melted with the alkalinity flux then soak with water. The filtrate of change into sulphate, and with rhodizonic acid disodium salt as the indicator, and it was titrated with BaCl2 standard solution at pH is 5.5-7.0. The result showed it was an easy-operating way with fast determination and high accuracy. It was less disturbed. The relative standard deviation is 0.31%, and the recovery rate of add standard is between 96.4%-100.8%.
出处
《陕西科技大学学报（自然科学版）》
2007年第2期94-96,共3页
Journal of Shaanxi University of Science & Technology
关键词
煤
玫瑰红酸钠
氯化钡
硫测定
coal
sodium rhodizonate
barium chloride
determination of sulphur
