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 ）.
出处
《分析试验室》
CAS
CSCD
北大核心
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
关键词
煤
有效态
AS
Coal
Available species
Arsenic
