氢化物发生原子荧光光谱法测定煤炭中砷  

Determination of arsenic in coal by HG-AFS method

作　　者：林晓梅[1] 曾泽[1] 谢琰[1] 

机构地区：[1]辽宁出入境检验检疫局,辽宁大连116001

出　　处：《化学工程师》2016年第12期26-28,共3页Chemical Engineer

摘　　要：建立了使用艾氏剂烧灼半熔融煤炭试样，氢化物发生原子荧光光谱法测定煤炭中砷的方法。试样使用艾氏剂保护、熔解试样，吸收捕捉砷，用酸溶解，溶液中As（V）用抗坏血酸预还原为As（Ⅲ），硫脲为抗干扰剂，使用KBH。产生氢化物，5％HCI溶液为载流，吸入氢化物发生原子荧光光谱仪进行测定。实验表明，检出限0．009ng·mL^-1；回收率95．2％～104．6％；精密度4．73％～8．78％。该方法宽容性好，条件宽松，操作简便，结果准确，适用性强。适合批量煤炭的砷同时测定。An effective method for determination of arsenic in coal by HG-AFS method was developed.The coal sample was burning and half-liquating by Aldrine. The sample was protected and liquated by Aldrine to ab- sorb and capture the arsenic. The pentavalent arsenic in solution dissolved with acid was prereduced to trivalent arsenic,that thiourea as anti-interference agent, Potassium borohydride producing hydride, 5% hydrochloric acid solution for load flow and the solution was determined with HG-AFS.According to the experimental data the detection limit was 0.009mg·L^-1,the recovery was 95.2%-104.6%,the precision was 4.73%-8.78%. The method was simple for determination of arsenic in batch of coal.

关 键 词：艾氏剂熔解 氢化物发生原子荧光光谱法 煤炭 砷 

分 类 号：O657.31[理学—分析化学]