Comparison of Raman and attenuated total reflectance (ATR) infrared spectroscopy for water quantification in natural deep eutectic solvent
© 2021. Springer-Verlag GmbH Germany, part of Springer Nature..
Natural deep eutectic solvents (NADES) are ionic solutions, of great interest for extraction from biomass, biocatalysis, and nanoparticle synthesis. They are easily synthesised and eco-friendly, have low volatility and high dissolution power, and are biodegradable. However, water content in NADES is a critical parameter, affecting their optimal use and extraction efficiency. Vibrational spectroscopic techniques are rapid, label-free, non-destructive, non-invasive, and cost-effective analytical tools that can probe the molecular composition of samples. A direct comparison between a previous study using attenuated total reflectance infrared (ATR-IR) spectroscopy for water quantification in NADES and the same investigation performed with Raman spectroscopy is presently reported. Three NADES systems, namely betaine-glycerol (BG), choline chloride-glycerol (CCG), and glucose-glycerol (GG), containing a range of water concentrations between 0% (w/w) and 40% (w/w), have been analysed with Raman spectroscopy coupled to partial least squares regression multivariate analysis. The values of root mean square error of cross-validation (RMSECV) obtained from analysis performed on the pre-processed spectra over the full spectral range (150-3750 cm-1) are respectively 0.2966% (w/w), 0.4703% (w/w), and 0.2351% (w/w) for BG, GG, and CCG. While the direct comparison to previous ATR-IR results shows essentially similar outcomes for BG, the RMSECV is 33.14% lower and 65.84% lower for CG and CCG. Furthermore, mean relative errors obtained with Raman spectroscopy, and calculated from a set of samples used as independent samples, were 1.452% (w/w), 1.175% (w/w), and 1.188% (w/w). Ultimately, Raman spectroscopy delivered performances for quantification of water in NADES with similar accuracy to ATR-IR. The present demonstration clearly highlights the potential of Raman spectroscopy to support the development of new analytical protocols in the field of green chemistry.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:413 |
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| Enthalten in: |
Analytical and bioanalytical chemistry - 413(2021), 19 vom: 01. Aug., Seite 4785-4799 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Elderderi, Suha [VerfasserIn] |
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| Links: |
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| Themen: |
Journal Article |
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| Anmerkungen: |
Date Completed 29.07.2021 Date Revised 29.07.2021 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1007/s00216-021-03432-2 |
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| 520 | |a © 2021. Springer-Verlag GmbH Germany, part of Springer Nature. | ||
| 520 | |a Natural deep eutectic solvents (NADES) are ionic solutions, of great interest for extraction from biomass, biocatalysis, and nanoparticle synthesis. They are easily synthesised and eco-friendly, have low volatility and high dissolution power, and are biodegradable. However, water content in NADES is a critical parameter, affecting their optimal use and extraction efficiency. Vibrational spectroscopic techniques are rapid, label-free, non-destructive, non-invasive, and cost-effective analytical tools that can probe the molecular composition of samples. A direct comparison between a previous study using attenuated total reflectance infrared (ATR-IR) spectroscopy for water quantification in NADES and the same investigation performed with Raman spectroscopy is presently reported. Three NADES systems, namely betaine-glycerol (BG), choline chloride-glycerol (CCG), and glucose-glycerol (GG), containing a range of water concentrations between 0% (w/w) and 40% (w/w), have been analysed with Raman spectroscopy coupled to partial least squares regression multivariate analysis. The values of root mean square error of cross-validation (RMSECV) obtained from analysis performed on the pre-processed spectra over the full spectral range (150-3750 cm-1) are respectively 0.2966% (w/w), 0.4703% (w/w), and 0.2351% (w/w) for BG, GG, and CCG. While the direct comparison to previous ATR-IR results shows essentially similar outcomes for BG, the RMSECV is 33.14% lower and 65.84% lower for CG and CCG. Furthermore, mean relative errors obtained with Raman spectroscopy, and calculated from a set of samples used as independent samples, were 1.452% (w/w), 1.175% (w/w), and 1.188% (w/w). Ultimately, Raman spectroscopy delivered performances for quantification of water in NADES with similar accuracy to ATR-IR. The present demonstration clearly highlights the potential of Raman spectroscopy to support the development of new analytical protocols in the field of green chemistry | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Label-free water quantification | |
| 650 | 4 | |a Natural deep eutectic solvent | |
| 650 | 4 | |a Partial least squares regression | |
| 650 | 4 | |a Raman spectroscopy | |
| 700 | 1 | |a Wils, Laura |e verfasserin |4 aut | |
| 700 | 1 | |a Leman-Loubière, Charlotte |e verfasserin |4 aut | |
| 700 | 1 | |a Henry, Sandra |e verfasserin |4 aut | |
| 700 | 1 | |a Byrne, Hugh J |e verfasserin |4 aut | |
| 700 | 1 | |a Chourpa, Igor |e verfasserin |4 aut | |
| 700 | 1 | |a Munnier, Emilie |e verfasserin |4 aut | |
| 700 | 1 | |a Elbashir, Abdalla A |e verfasserin |4 aut | |
| 700 | 1 | |a Boudesocque-Delaye, Leslie |e verfasserin |4 aut | |
| 700 | 1 | |a Bonnier, Franck |e verfasserin |4 aut | |
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