Characterization of Phosphorus Compounds in Soils by Deep Ultraviolet (DUV) Raman Microspectroscopy
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Author(s)
Vogel, Christian
Ramsteiner, Manfred
Sekine, Ryo
Doolette, Ashlea
Adam, Christian
Griffith University Author(s)
Year published
2017
Metadata
Show full item recordAbstract
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 μm2 enables 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 ...
View more >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 μm2 enables 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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View more >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 μm2 enables 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.
View less >
Journal Title
Journal of Raman Spectroscopy
Volume
48
Issue
6
Copyright Statement
© 2017 John Wiley & Sons, Ltd. This is the peer reviewed version of the following article: Characterization of phosphorus compounds in soils by deep ultraviolet (DUV) Raman microspectroscopy, Journal of Raman Spectroscopy, Vol. 48, pp. 867–871, 2017, which has been published in final form at DOI. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving (http://olabout.wiley.com/WileyCDA/Section/id-828039.html)
Subject
Condensed matter physics
Condensed matter physics not elsewhere classified
Physical chemistry
Mechanical engineering
Phosphorus speciation
Soil
Deep ultraviolet (DUV) Raman microspectroscopy