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| Study on Atomic Fluorescence Spectrometry Excited by Synchrotron Radiation |
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Jia-jia Guo a1, Wu-er Gan a1, Guo-bin Zhang b2, Qing-de Su a*2
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1.Department of Chemistry, University of Science and Technology of China, Hefei 230026, China;2.National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230027, China
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| Abstract: |
| A novel analysis approach using atomic fluorescence excited by synchrotron radiation is presented.A system for synchrotron radiation-atomic fluorescence spectrometry is developed, and experimental conditions such as flow rate, analyte acidity, concentration of pre-reducing and hydrogenation system are optimized. The proposed method is successfully applied to get an excitation spectrum of arsenic. Seven of ten primary spectral lines, four of which have never been reported by means of atomic fluorescence spectrometry, agree well with the existing reports.The other three are proposed for the first time. Excitation potentials and possible transitions are investigated. Especially for the prominent line at 234.99 nm, the mechanism of generation is discussed and a model of energy transition processes is proposed. |
| Key words: Synchrotron radiation, Atomic fluorescence, Arsenic, Energy transition |
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附件 |
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| Study on Atomic Fluorescence Spectrometry Excited by Synchrotron Radiation |
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郭佳佳a1, 淦五二a1, 张国斌b2, 苏庆德 a*1
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1.中国科学技术大学化学系，合肥230026;2.中国科学技术大学国家同步辐射实验室，合肥230027
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| 摘要: |
| 将同步辐射作为原子荧光的新型激发光源，建立了同步辐射原子荧光光谱分析装置，并对具体实验条件，如气体流速、分析物酸度、预还原试剂以及氢化物发生体系浓度等进行优化. 利用该装置测定了原子荧光代表分析物?砷的同步辐射原子荧光激发谱线. 在主要的10条谱线中，7条与现有文献记载十分吻合，其中4条系首次以原子荧光手段获得，另3条系首次发现. 对谱线所对应的激发电位以及可能的跃迁过程进行了分析，特别是对234.99 nm强峰的产生机理进行了探讨，并建立了能级跃迁模型. |
| 关键词: 同步辐射，原子荧光，砷，能级跃迁 |
| DOI：10.1088/1674-0068/21/05/427-432 |
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