A1 Journal article (refereed)
Enhanced quantification of wollastonite and calcite in limestone using fluorescence correction based on continuous wavelet transformation for Raman (2021)

Laakso, K., Kangas, L., Häkkänen, H., Kaski, S., & Leveinen, J. (2021). Enhanced quantification of wollastonite and calcite in limestone using fluorescence correction based on continuous wavelet transformation for Raman. Applied Spectroscopy Reviews, 56(1), 67-84. https://doi.org/10.1080/05704928.2020.1729170

JYU authors or editors

Publication details

All authors or editors: Laakso, Kati; Kangas, Lasse; Häkkänen, Heikki; Kaski, Saara; Leveinen, Jussi

Journal or series: Applied Spectroscopy Reviews

ISSN: 0570-4928

eISSN: 1520-569X

Publication year: 2021

Volume: 56

Issue number: 1

Pages range: 67-84

Publisher: Taylor & Francis

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1080/05704928.2020.1729170

Publication open access: Not open

Publication channel open access:

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/67985

Abstract

Raman spectroscopy offers a nondestructive means to identify minerals in rocks, but the ability to use the technology for quantitative mineralogical analysis is limited by fluorescence that can mask the spectral features of minerals. In this paper we apply continuous wavelet transformation (CWT) to remove fluoresence from Raman data acquired from 26 carbonate rock samples. We then record the intensity values of individual spectral features, proxies for mineral abundances, using the original Raman data and the thus inferred CWT data. The intensity values are then compared against the known mineral abundances determined using the scanning electron microscope (SEM) technology. This comparison is conducted using a linear regression model to determine whether fluorescence removal enhances the mineral abundance predictions. Our results suggest that CWT enhances the accuracy of mineral abundance estimates, thus highlighting the importance of fluorescence removal when using Raman for quantitative mineralogical analysis.

Keywords: spectroscopy; fluorescence; minerals; mineralogy

Free keywords: Raman; fluorescence; wavelets; wollastonite; calcite

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Ministry reporting: Yes

Reporting Year: 2021

JUFO rating: 1