| 硝酸镍-硝酸镧基体改进剂石墨炉原子吸收测定硫磺中痕量砷 |
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| 引用本文： | 吴健玲,龚琦,伍先国,邓磊,莫利书,郑向明.硝酸镍-硝酸镧基体改进剂石墨炉原子吸收测定硫磺中痕量砷[J].光谱学与光谱分析,2002,22(1):139-142. |
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| 作者姓名： | 吴健玲 龚琦 伍先国 邓磊 莫利书 郑向明 |
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| 作者单位： | 1. 广西大学化学化工学院,广西,南宁,530004
2. 广西防城港商检局,广西,防城港市,538001 |
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| 基金项目： | 广西商检局资助项目桂检科 [(1 997) 1 55号 ] |
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| 摘 要： | 本文研究了以硝酸镍 硝酸镧为基体改进剂 ,石墨炉原子吸收法测定硫磺中痕量砷 ,还研究了硫磺的控温电热酸消解和高压坩埚酸消解。试验表明 ,硫磺试样经硝酸 高氯酸消解后测砷 ,用硝酸镍 硝酸镧基体改进剂 ,比只用硝酸镍基体改进剂 ,灵敏度明显提高。试样的分析结果与HG ICP AES相吻合 ,方法检出限为0 0 34 μg·mL- 1 ,RSD≤ 2 1% (n =4) ,回收率 97 5 %～ 110 %。
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| 关 键 词： | 砷 硫磺 石墨炉原子吸收光谱法 基体改进剂 硝酸镍 硝酸镧 测定 痕量分析 |
| 文章编号： | 1000-0593(2002)01-0139-04 |
| 修稿时间： | 2000年12月23 |
Determination of Trace Arsenic in Sulfur by Graphite Furnace Atomic Absorption Spectrometry with La(NO3)3-Ni(NO3)2 Matrix Modifier |
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| WU Jian-ling ,GONG Qi ,WU Xian-guo ,DENG Lei ,MO Li-shu ,and ZHENG Xiang-ming .College of Chemsitry and Chemical Engineering,Guangxi University,Nanning ,China .Import and Export Commodity Inspection Bureau of Fangcheng Port,Fangche.Determination of Trace Arsenic in Sulfur by Graphite Furnace Atomic Absorption Spectrometry with La(NO3)3-Ni(NO3)2 Matrix Modifier[J].Spectroscopy and Spectral Analysis,2002,22(1):139-142. |
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| Authors: | WU Jian-ling GONG Qi WU Xian-guo DENG Lei MO Li-shu and ZHENG Xiang-ming College of Chemsitry and Chemical Engineering Guangxi University Nanning China Import and Export Commodity Inspection Bureau of Fangcheng Port Fangche |
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| Institution: | College of Chemsitry and Chemical Engineering, Guangxi University, Nanning 530004, China. |
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| Abstract: | In this paper, the decomposition method of sulfur and the determination of trace arsenic in sulfur by GFAAS with La(NO3)3-Ni(NO3)2 matrix modifier were studied in detail. The decomposition of sulfur with mixed acid HNO3-HClO4 by controlled temperature electrothermal method or pressure crucible method was efficient and safe. The sensitivity of the determination of arsenic with La(NO3)3-Ni(NO3)2 matrix modifier was higher than with Ni(NO3)2 or Mg(NO3)2 matrix modifiers. The detection limit was 0.034 microgram.mL-1 (k = 3). The analytical results of the sulfur samples were coincident with the results of determination by HG-ICP-AES. The adding recoveries were 97.5%-110% and the relative standard deviation was less than or equal to 2.1% (n = 4). |
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| Keywords: | Arsenic Sulfur Graphite furnace atomic absorption spectrometry Matrix modifier |
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