原煤中有效态砷的提取方法  

Study on extraction of available species of As in raw coal

作　　者：张江义[1] 陈锦凤[1,2] 王肖戈[3] 张清[1] 成金华[3] 帅琴[1] 

机构地区：[1]中国地质大学(武汉)材料科学与化学工程学院,武汉430074 [2]武汉理工大学资源与环境工程学院,武汉430070 [3]中国地质大学(武汉)经济学院,武汉430074

出　　处：《分析试验室》2009年第7期65-67,共3页Chinese Journal of Analysis Laboratory

基　　金：科技部国际合作基金(2006DFA63190)资助

摘　　要：以1．0mol／LHNO3作为提取剂，用氢化物发生．原子荧光法（HG-AFS）测定提取液中砷的含量，建立了原煤中有效态砷的提取方法。考察了提取剂浓度、超声提取时间、液固比对原煤中有效态砷的提取效果的影响，在提取剂HNO3浓度为1mol／L，超声提取时间1h，液固比为15：1时提取效果最好。样品加标回收率为95．8％～98．0％。方法的线性范围为20～100ng／mL，相关系数为0．9999，检出限为0．63ng／mL（3σ，n=11）。A method for extracting the available species of As in raw coal by i. 0 mol/L HNO3 and quantifying by HGAFS has been developed. The experimental conditions were discussed, such as extractant concentration, ultrasonic extracting time, liquid-solid ratio. The results suggested that the optimal technical conditions were as follows： 1.0 mol/L HN03 as extracting reagent, the ratio of extracting reagent to materials was 15 ： 1, extraction time for 1.0 h. The recoveries of As in samples were 95.8% - 98.0%. The linear range of As was 20 - 100 ng/mL, the correlation coefficient for As derivatives was 0.9999, the detection limit was 0.63 ng/mL （3σ, n = 11 ）.

关 键 词：煤 有效态 AS 

分 类 号：O652.6[理学—分析化学]