摘要
建立氧弹燃烧–原子荧光光谱法测定煤中汞含量的方法。用氧弹燃烧分解样品,汞释放后以硝酸溶液吸收,以0.5 g/L硼氢化钾溶液作为还原剂,体积分数5%的硝酸溶液为载流液,用原子荧光光谱法定量测定。方法检出限为0.02μg/kg,对标准物质GBW 11156(标准值0.32μg/g)进行平行测定,测定结果的平均值为0.318μg/g,相对标准偏差为7.3%(n=6),加标回收率为91.5%~106.5%。该方法简单、干扰少,准确度和精密度良好,可用于煤中汞的测定。
The method for determination of mercury in coal was set up by oxygen bomb combustion–atomic fluorescence spectrometry.Mercury was absorbed by nitric acid solution when samples were combusted and decomposed by oxygen bomb,and quantitatively analyzed by atomic fluorescence spectrometry with0.5g/L KBH4solution as the reducing agent and5%HNO3solution as the mobile phase.The detection limit was0.02μg/kg,the relative standard deviation of the results for0.32μg/g Hg was7.3%(n=6),and the recovery was between91.5%and106.5%.This method is simple,less disturbant,accurate and precise,and it is suitable for the determination of mercury in coal.
作者
王昌钊
吴双民
张遴
Wang Changzhao;Wu Shuangmin;Zhang Lin(Shaanxi Entry–Exit Inspection and Quarantine Bureau, Xi’an 710068, China)
出处
《化学分析计量》
CAS
2017年第2期70-72,共3页
Chemical Analysis And Meterage
关键词
煤
氧弹燃烧
原子荧光
汞
coal
oxygen bomb combustion
AFS
Hg
