| 砷和汞的顺序注射-蒸气发生原子吸收光谱测定 |
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| 引用本文： | 马泓冰,徐淑坤,周焕英,王世立,方肇伦.砷和汞的顺序注射-蒸气发生原子吸收光谱测定[J].光谱学与光谱分析,2000,20(4):529-532. |
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| 作者姓名： | 马泓冰 徐淑坤 周焕英 王世立 方肇伦 |
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| 作者单位： | 东北大学332信箱,分析科学研究中心,110006,沈阳 |
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| 摘 要： | 本文建立了砷和汞的顺序注射 蒸气发生原子吸收光谱测定方法。在流动注射蒸气发生原子吸收光谱测定方法的基础上 ,采用汇流技术 ,通过两个微量注射泵和一个多位选择阀的计算机程控操作 ,实现待测组分与硼氢化钠间的强氧化还原反应及其气 液分离过程。与流动注射方法相比 ,进一步大幅度节省试剂消耗 ,显著提高分析的精度及长期稳定性。在 1 2 0·h- 1 的采样频率下汞和砷的测定精度RSD分别为 2 2 %和 1 4%,检出限分别为 0 1 5和 0 0 7μg·L- 1 。方法用于地球化学标准样品的分析 ,取得满意结果。
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| 关 键 词： | 顺序注射 蒸气发生 原子吸收光谱 砷 汞 测定 |
Sequential Injection Vapor Generation Atomic Absorption Spectrometric Determination of Mercury and Arsenic |
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| Hongbing MA,Shukun XU,Huanying ZHOU,Shili WANG,Zhaolun FANG.Sequential Injection Vapor Generation Atomic Absorption Spectrometric Determination of Mercury and Arsenic[J].Spectroscopy and Spectral Analysis,2000,20(4):529-532. |
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| Authors: | Hongbing MA Shukun XU Huanying ZHOU Shili WANG Zhaolun FANG |
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| Institution: | Box 332, Research Center for Analytical Sciences, Northeastern University, 110006 Shenyang. |
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| Abstract: | A sequential injection vapor generation atomic absorption spectrometric (SI-VGAAS) method for the determination of mercury and arsenic was developed, characterized by reagent merging using a double-syringe pump and a multi-position selector valve. A sample throughput of 120 h-1 was achieved with 500 microL sample with a precision of 2.2% for mercury at 8.0 micrograms.L-1 (n = 11) and 1.4% for arsenic at 6.0 micrograms.L-1 (n = 11) levels and a detection limit of 0.15 microgram.L-1 for mercury and 0.07 microgram.L-1 for arsenic. The method was applied to the analysis of geochemical standard reference material GSS-5, and good agreement with the certified values were obtained. |
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| Keywords: | Sequential injection Vapor generation AAS Mercury Arsenic |
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