| L''''vov平台技术用于石墨炉原子吸收光谱法测定牙膏中的铅 |
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| 引用本文： | 张巽,李彬贤,高卫民,张玉根. L''''vov平台技术用于石墨炉原子吸收光谱法测定牙膏中的铅[J]. 光谱学与光谱分析, 1999, 19(3): 388-391 |
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| 作者姓名： | 张巽 李彬贤 高卫民 张玉根 |
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| 作者单位： | 1. 中国科学技术大学地球和空间科学系,230026,合肥;第三世界科学院中国科学技术大学地球和天文学高级研究中心,230026,合肥
2. 中国科学技术大学地球和空间科学系,230026,合肥 |
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| 摘 要： | 用石墨炉原子吸收法测定低含量元素时，平台技术可有效地提高测定的灵敏度。本文从平台的制作到平台涂层的选择，以及对不同石墨管加入平台后的效果作了比较。
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| 关 键 词： | 平台技术 牙膏 铅 |
GFAAS Determination of Trace Lead in Toothpaste Using L′vov Platform |
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| Xun ZHANG,Binxian LI,Weimin GAO,Yugeng ZHANG. GFAAS Determination of Trace Lead in Toothpaste Using L′vov Platform[J]. Spectroscopy and Spectral Analysis, 1999, 19(3): 388-391 |
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| Authors: | Xun ZHANG Binxian LI Weimin GAO Yugeng ZHANG |
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| Affiliation: | Department of Earth and Space Sciences, University of Science and Technology of China, 230026 Hefei. |
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| Abstract: | Sensitivity in determining low melting point metals is highly improved by means of platform technique in graphite furnace AAS. In this paper we describe a method of determining trace lead in toothpaste by this technique. The method of making the platform and the selection of the platform coating were discussed and the results with and without the platform were compared. The optimum ashing temperature, atomization temperature and experimental conditions were investigated. The interference of large amount Al and Ca in the matrix on determination of trace lead can be minimized by using platform technique. The precision of about 0.9% and detection limit of about 15 ng obtained by this improved method are much better than those by methods without platform. |
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