光谱学与光谱分析 |
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Study on the Characteristics and Compositions of Fine Particles Left in the Solution after Decomposition of Plant Samples |
WANG Xiao-ping1, GAO Wei-jian2,XIANG Su-liu2 |
1. School of Radioactive Medicine and Public Hygiene, Suzhou University, Suzhou 215007, China 2. Analytical Center, Suzhou University, Suzhou 215007, China |
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Abstract After decomposition of plant standard reference materials bush twigs and leaves (GBW07602, GBW07603), poplar leaves(GBW07604) and tea(GBW07605) with either dry ashing method or wet digestion method, all kinds of fine particles left in the solution were collected and examined carefully by a scanning electron microscope(SEM), and their chemical composition were investigated by a SEM-affiliated energy-dispersive X-ray spectrometer at the same time. Moreover, the concentrations of some metal elements distributed among four different tea SRM-originated particle fractions extracted following the BCR sequential extraction procedure were determined by AAS and ICP-AES. It was found that decomposition methods have a great influence on the structure of fine particles. When dry ashing method is used, grey-colored, fluffy and porous partices can be produced, whereas fewer white-colored, compact particles can be produced when another method is used. As for chemical composition, all kinds of fine particles are almost the same, with silicon and aluminium as their main constituents, and calcium, iron, potassium, titanium and so on as their minor ones. The elemental distribution percentages in four different particle fractions in two kinds of plant-originated particles differ from element to element, which can result in severe negative errors when plant samples are decomposed and determined for elemental concentrations.
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Received: 2004-08-06
Accepted: 2005-02-18
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Corresponding Authors:
WANG Xiao-ping
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Cite this article: |
WANG Xiao-ping,GAO Wei-jian,XIANG Su-liu. Study on the Characteristics and Compositions of Fine Particles Left in the Solution after Decomposition of Plant Samples [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(02): 348-352.
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URL: |
https://www.gpxygpfx.com/EN/Y2006/V26/I02/348 |
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