| 乙酰丙酮在低温电热蒸发ICP-AES中的化学改进作用机理研究 |
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| 引用本文： | 吴英亮,胡斌,江祖成. 乙酰丙酮在低温电热蒸发ICP-AES中的化学改进作用机理研究[J]. 高等学校化学学报, 2004, 25(1): 50-52 |
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| 作者姓名： | 吴英亮 胡斌 江祖成 |
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| 作者单位： | 武汉大学化学与分子科学学院, 武汉 430072 |
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| 基金项目： | 国家自然科学基金 (批准号 :2 0 1750 14 )资助 |
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| 摘 要： | 近年来 ,低温蒸发技术的研究和应用引起了人们的重视 [1～ 3 ] .我们 [4]曾报道应用乙酰丙酮试剂作化学改进剂 ,于石墨管中低温 (～ 75 0℃ )蒸发铍的乙酰丙酮螯合物的 ETV-ICP-AES法 ,并用于人发中痕量铍的测定 .本文从机理上探讨了待测物 (铍或铬 )在石墨管中的蒸发及传输形式 ;研究了相应的乙酰丙酮螯合物的生成条件及主要影响因素 ;在此基础上得出在低温蒸发条件下相应的规律 .1 实验部分1.1 仪器装置 所用的 ICP-AES仪器、电热蒸发装置及它们之间的连接与文献 [1,4]相同 .紫外 -可见分光光度计 (日本岛津 UV-2 0 0 0 ) ,仪器…
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| 关 键 词： | 低温电热蒸发 乙酰丙酮 化学改进剂 铍 铬(Ⅲ) |
| 文章编号： | 0251-0790(2004)01-0050-03 |
| 收稿时间： | 2002-04-19 |
Studies on the Chemical Modification and Its Mechanism of Acetylacetone in Low Temperature ETV-ICP-AES |
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| WU Ying-Liang,HU Bin,JIANG Zu-Cheng. Studies on the Chemical Modification and Its Mechanism of Acetylacetone in Low Temperature ETV-ICP-AES[J]. Chemical Research In Chinese Universities, 2004, 25(1): 50-52 |
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| Authors: | WU Ying-Liang HU Bin JIANG Zu-Cheng |
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| Affiliation: | College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China |
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| Abstract: | The vaporization and transport modes of Be and Cr(Ⅲ) from the graphite tube were studied by using the low temperature vaporization technique combined with ICP-AES. The main factors of influencing the formation of Be and Cr(Ⅲ) acetylacetonates were investigated. It was found that the Be and Cr(Ⅲ)} acetylacetonates were able to vaporize and introduce quantitatively into ICP with good thermal stability and volatility. The chelation reaction between the analyte and acetylacetone should be completed before the sample introduction to avoid the formation of refractory carbide and to eliminate the memory effect. |
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| Keywords: | Low temperature electrothermal vaporization Acetylacetone Chemical modification agent Be Cr(Ⅲ) |
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