Characterization of phosphorus compounds in soils by deep ultraviolet (DUV) Raman microspectroscopy

Characterization of phosphorus compounds in soils by deep ultraviolet (DUV) Raman microspectroscopy
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通过深紫外 (DUV) 拉曼显微光谱表征土壤中的磷化合物

DOI:
10.1002/jrs.5115
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发表时间:
2017
影响因子:
2.5
通讯作者:
C. Adam
C. Adam
中科院分区:
化学3区
文献类型:
--
作者:
C. Vogel;M. Ramsteiner;R. Sekine;A. Doolette;C. Adam

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深紫外拉曼显微光谱学作为一种直接分析土壤中磷化合物化学状态的新方法已被成功研究。我们证明,紫外线激发具有避免土壤中有机物引起的可见光谱范围内强荧光干扰的优点。此外,<1 μm2 的空间分辨率能够检测非常小的磷颗粒。对于某些有机磷化合物(β-甘油磷酸盐、氨甲基膦酸),发现样品冷却至 -100 °C 可以大大降低由紫外激发光照射引起的降解率。然而,即使冷却,植酸和单磷酸腺苷也会降解。我们的结果揭示了深紫外拉曼显微光谱作为一种高分辨率台式成像技术的能力,用于分析土壤化合物之间的局部相互作用,并有可能成为提高对磷酸盐以及土壤中其他矿物相转化机制的理解的分析关键。版权所有 © 2017 约翰威利父子有限公司
Deep ultraviolet Raman microspectroscopy was successfully investigated as a new approach to analyze the chemical state of phosphorus compounds directly in soil. We demonstrate that ultraviolet excitation has the advantage to avoid the interference with the strong fluorescence, which occurs in the visible spectral range caused by organic matter in soils. Furthermore, the spatial resolution of <1 μm2enables the detection of very small phosphorus particles. For some organic phosphorus compounds (β‐glycerophosphate, aminomethylphosphonic acid), sample cooling to −100 °C is found to strongly reduce the rate of degradation induced by the illumination with the ultraviolet excitation light. However, phytic acid and adenosine monophosphate degraded even with cooling. Our results reveal the capability of deep ultraviolet Raman microspectroscopy as a high‐resolution benchtop imaging technique for the analysis of local interactions between soil compounds with the potential to become an analytical key to improve the understanding of transformation mechanisms of phosphates as well as other mineral phases in soils. Copyright © 2017 John Wiley & Sons, Ltd.
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DOI: --
发表时间: 1996
期刊:
影响因子: --
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