摘要
采用离子色谱法测定原煤中的总氯，标准工作曲线的线性范围在０ ．０１ ～２４ ｍｇ／ Ｌ，相关系数为０ ．９９９ ８ ，测定ρ（ Ｃｌ－ ） ＝ １ ．２０ ｍｇ／ Ｌ 的标准溶液１０ 次，ＲＳＤ 为０ ．７７ ％ 。用艾氏卡试剂在８００ ℃±２５ ℃下分解煤样，去离子水浸提后用离子色谱法测定原煤中的总氯。测定了１８ 个煤样中的氯，加标回收率为９７ ．８ ％ ～１０４ ．４ ％ ，与银量滴定法对照，两种方法基本相符。
A method for determination of total chlorine in raw coals by ion chromatography is developed. The relative standard deviation of this method is 0.77% ( n =10, ρ Cl - =1.20 mg/L). The related coefficient of standard working curve is 0.999?8. Linear range for chlorine is 0.01 to 24 mg/L. The raw coal was fused by Eschks mixture at (800±25)℃ and was leached by de ionized water. The chlorine in leached solution was determined by ion chromatography. The recoveries of standard addition for chlorine in different coal samples are in a range of 97.8% to 104.4%. The method has been applied to the determination of total chlorine in 18 raw coal samples. The results are in agreement with those provided by argentometric titration.
出处
《岩矿测试》
CAS
CSCD
北大核心
1999年第4期299-302,共4页
Rock and Mineral Analysis
基金
煤炭科学基金
关键词
氯
离子色谱法
煤
chlorine
coal
ion chromatography
