氧弹燃烧-电位滴定法测定煤中氯

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。

Determination of Chlorine in Coal by Combustion Bomb-Potentiometric Titration

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.