Shifted excitation Raman difference spectroscopy: A promising tool for the investigation of soil. (16th January 2020)

• Record Type: Journal Article
• Authors: Theurer, Lara S.; Maiwald, Martin; Sumpf, Bernd
• Is Part Of: European journal of soil science. Volume 72:Number 1(2021)
• Page Start: 120
• Page End: 124
• Publication Date: 2020-01-16
• Subjects: diode laser -- optical sensor -- phosphate -- Raman spectroscopy -- soil analysis; Soil science -- Periodicals; 631.4
• DOI: 10.1111/ejss.12928
• Languages: English
• ISSNs: 1351-0754

Abstract

Abstract: In this paper we demonstrate shifted excitation Raman difference spectroscopy (SERDS) for soil analysis as a proof of concept. Confocal Raman microscopy is performed for sample analysis as well as for qualitative comparison with our SERDS experiments. Raman spectra of a soil sample show huge background signals, which mask weak Raman peaks. SERDS clearly separates the Raman signals from background signals with a 10‐fold improvement of the signal‐to‐background noise ratio. Thus, besides hydroxyapatite, additional Raman bands from quartz and feldspar could be extracted. The results demonstrate SERDS as a promising tool for soil analysis. Highlights: Raman spectroscopy for soil characterization, e.g., for nutrient management. SERDS as a proof of concept for soil analysis. SERDS extracts Raman signals from disturbing background signals. SERDS as a promising tool for soil investigations.