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1. 中国地质大学北京
2. 数理学院,北京,100083
[ "通讯作者: 罗立强,E-mail: luoliqiang@cags.ac.cn E-mail:luoliqiang@cags.ac.cn" ]
纸质出版日期:2014-07-22
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袁 静, 罗立强. 同步辐射微区X射线荧光和吸收谱技术在大气、土壤和动植物分析中的应用[J]. 核技术, 2014,37(8):080101
YUAN Jing, LUO Liqiang. Synchrotron μ-XRF and XAFS in element distribution and speciation of air, soil and biological samples[J]. Nuclear techniques, 2014, 37(8): 080101
袁 静, 罗立强. 同步辐射微区X射线荧光和吸收谱技术在大气、土壤和动植物分析中的应用[J]. 核技术, 2014,37(8):080101 DOI: 10.11889/j.0253-3219.2014.hjs.37.080101.
YUAN Jing, LUO Liqiang. Synchrotron μ-XRF and XAFS in element distribution and speciation of air, soil and biological samples[J]. Nuclear techniques, 2014, 37(8): 080101 DOI: 10.11889/j.0253-3219.2014.hjs.37.080101.
同步辐射微区X射线荧光(Synchrotron micro-X-ray fluorescence spectroscopy
μ-SXRF)能够对物质进行元素分布分析和微区原位测定,具有高灵敏度、低检出限的特点。同步辐射X射线吸收谱技术(X-ray absorption fine spectroscopy
XAFS)能够提供原子周围的配位环境和化学形态,适用于进行元素形态分析。大气飘尘、土壤和动植物等是环境中元素迁移转化的重要载体,获取具有生物学意义的元素分布和形态,以及准确的定性或定量信息对研究这些元素在环境和生物体中的作用至关重要。随着研究的发展,同步辐射微区分析技术在此领域中得到越来越多的应用。本文介绍了同步辐射技术的基本原理和发展历程,回顾了近几年μ-SRXRF和XAFS技术在大气飘尘、土壤、植物和蚯蚓中元素的分布与形态研究领域的应用进展,对目前应用于此领域遇到的一些挑战进行了概括,并对其未来发展趋势提出了展望。
Background: Synchrotron radiation micro probe analysis technique has been improved rapidly in recent years. Accurate qualitative or quantitative information on the interest element in environmental and biological samples such as atmospheric particles
soil
plant and earthworm plays a crucial role in the understanding of the effect of these elements in the samples. However
determination of these samples with complex matrices is a difficulty in multiple disciplines. With the rapid development of this area
the synchrotron-based techniques have been introduced to this area and have been widely used in analyzing various complex samples due to its superiority in fast and non-destructive determination. Purpose: In this review
the synchrotron source and its advantages in investigation on elemental analysis of the complex natural samples are introduced. Then
the applications of Synchrotron micro-X-ray fluorescence (μ-SXRF) and Synchrotron X-ray absorption fine spectroscopy (XAFS) in atmospheric particles
soil
plant and earthworm are reviewed
covering the distribution and the speciation of elements in these samples. Methods: μ-SXRF permits in situ mapping of biologically important elements of the sample even at sub-micrometer scale so that the spatially resolved element distribution maps can be obtained. XAFS allows determination of the speciation of high heterogeneity samples by providing the element oxidation state and local coordination environment. Results and Conclusion: μ-SXRF and XAFS have been widely used in element distribution and speciation of nature samples
especially for micro scale samples or micro area of samples such as atmospheric particles
soil
plant and earthworm. It is relevant to study thoroughly the presence
source
mobilization and fate of the elements using the information. Some challenges and future perspectives of the research and the tendency of development of synchrotron radiation technology have also been suggested. Abstract
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