| 探针原子化石墨炉原子吸收法测定高纯金属镁中痕量铅 |
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| 引用本文： | 侯书恩,史玉芳,王亚平.探针原子化石墨炉原子吸收法测定高纯金属镁中痕量铅[J].岩矿测试,2001,20(1):65-67. |
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| 作者姓名： | 侯书恩 史玉芳 王亚平 |
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| 作者单位： | 1. 中国地质大学测试中心,
2. 国家地质实验测试中心, |
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| 基金项目： | 国土资源部九五重点科技项目(9505616) |
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| 摘 要： | 使用自制的全自动探针原子化装置，将探针原子化技术应用于测定高纯金属镁中痕量铅，利用样品中的基体镁转化成的硝酸镁作为基体改进剂，进一步改善了铅的分析性能。通过实验，确定了最佳的仪器条件和探针原子化分析条件，并与管壁原子化法进行了比较。方法检出限为4.3×10-12gPb，相对标准偏差（RSD,n=6）为8.2％，高纯金属镁中加标回收率在93％～104％。
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| 关 键 词： | 铅 探针原子化 石墨炉原子吸收法 金属镁 |
| 文章编号： | 0254-5357(2001)01-0065-03 |
| 修稿时间： | 2000年8月25日 |
Determination of Trace Lead in High-purity Magnesium by Probe Atomization-GFAAS |
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| HOU Shu en,SHI Yu fang,WANG Ya ping.Determination of Trace Lead in High-purity Magnesium by Probe Atomization-GFAAS[J].Rock and Mineral Analysis,2001,20(1):65-67. |
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| Authors: | HOU Shu en SHI Yu fang WANG Ya ping |
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| Institution: | HOU Shu en 1,SHI Yu fang 1,WANG Ya ping 2 |
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| Abstract: | A method was developed for determination of trace lead in high-purity magnesium by probe atomization-GFAAS.The sample matrix of magnesium was transformed into magnesium nitrate and as an effective matrix modifier for determination of lead in graphite furnace AAS. Using this method the separation procedures of lead from the sample matrix were avoided. The factors that influenced the analytical results of lead by probe atomization AAS were studied and analytical performances of the method were compared with those by tube wall atomization AAS. The detection limit of method was 4.3×10-12g of Pb. Recoveries of standard addition were in 93%～104％ with precision of 8.2％ RSD(n=6). |
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| Keywords: | lead probe atomization graphite furnace atomic absorption spectrometry(GFAAS) high purity magnesium |
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