摘要
介绍了氧弹燃烧-电位滴定法测定煤中氯离子含量的方法：将样品于加入已知量的碳酸铵溶液的氧弹内燃烧，释放出的氯被碳酸铵溶液吸收后用0．01mol／L的硝酸银标准溶液进行电位滴定。方法的检出限为0．007mg，回收率为96．4％-101．4％。用于实际样品的测定，准确度和精密度与ISO和国标方法相当，但操作简便、快捷。
This article presents the method for determination of chlorine content in coal by combustion bomb-potentiometric titration. A weighed specimen is burned in a combustion bomb containing pressed oxygen and fixed-amount of ammonium carbonate solution. The chlorides released from the burning reaction are absorbed by ammonium carbonate solution and determined by potentiometric titration with silver nitrate standard solution（0.01 mol/L）. The dection limit of method is 0. 007 mg for Cl with recoveries of 96.4% - 101.4%. The accuracy and precision obtained by the method for practical samples are comparable with those from the methods recommended by ISO and other national standard methods.
出处
《岩矿测试》
CAS
CSCD
2006年第1期79-81,共3页
Rock and Mineral Analysis
关键词
电位滴定
氯
煤
氧弹
potentiometric titration
chlorine
coal
combustion bomb
