Portable Raman spectroscopy for an in-situ monitoring the ripening of tomato ( Solanum lycopersicum ) fruits

2017 ◽  
Vol 180 ◽  
pp. 138-143 ◽  
Author(s):  
Josu Trebolazabala ◽  
Maite Maguregui ◽  
Héctor Morillas ◽  
Alberto de Diego ◽  
Juan Manuel Madariaga
Keyword(s):  
Raman Spectroscopy ◽  
Solanum Lycopersicum ◽  
In Situ Monitoring ◽  
Portable Raman Spectroscopy ◽  
Portable Raman

scholarly journals In Situ Water Quantification in Natural Deep Eutectic Solvents Using Portable Raman Spectroscopy

Molecules ◽  
2021 ◽  
Vol 26 (18) ◽  
pp. 5488
Author(s):  
Suha Elderderi ◽  
Laura Wils ◽  
Charlotte Leman-Loubière ◽  
Hugh J. Byrne ◽  
Igor Chourpa ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Water Content ◽  
Deep Eutectic Solvents ◽  
Portable Device ◽  
Natural Deep Eutectic Solvents ◽  
Research Grade ◽  
Mean Square Errors ◽  
Portable Raman Spectroscopy ◽  
Portable Raman

Raman spectroscopy is a label-free, non-destructive, non-invasive analytical tool that provides insight into the molecular composition of samples with minimum or no sample preparation. The increased availability of commercial portable Raman devices presents a potentially easy and convenient analytical solution for day-to-day analysis in laboratories and production lines. However, their performance for highly specific and sensitive analysis applications has not been extensively evaluated. This study performs a direct comparison of such a commercially available, portable Raman system, with a research grade Raman microscope system for the analysis of water content of Natural Deep Eutectic Solvents (NADES). NADES are renewable, biodegradable and easily tunable “green” solvents, outcompeting existing organic solvents for applications in extraction from biomass, biocatalysis, and nanoparticle synthesis. Water content in NADES is, however, a critical parameter, affecting their properties, optimal use and extraction efficiency. In the present study, portable Raman spectroscopy coupled with Partial Least Squares Regression (PLSR) is investigated for rapid determination of water content in NADES samples in situ, i.e., directly in glassware. 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 28.5% (w/w), were studied. The results are directly compared with previously published studies of the same systems, using a research grade Raman microscope. PLSR results demonstrate the reliability of the analysis, surrendering R2 values above 0.99. Root Mean Square Errors Prediction (RMSEP) of 0.6805%, 0.9859% and 1.2907% w/w were found for respectively unknown CCG, BG and GG samples using the portable device compared to 0.4715%, 0.3437% and 0.7409% w/w previously obtained by analysis in quartz cuvettes with a Raman confocal microscope. Despite the relatively higher values of RMSEP observed, the comparison of the percentage of relative errors in the predicted concentration highlights that, overall, the portable device delivers accuracy below 5%. Ultimately, it has been demonstrated that portable Raman spectroscopy enables accurate quantification of water in NADES directly through glass vials without the requirement for sample withdrawal. Such compact instruments provide solvent and consumable free analysis for rapid analysis directly in laboratories and for non-expert users. Portable Raman is a promising approach for high throughput monitoring of water content in NADES that can support the development of new analytical protocols in the field of green chemistry in research and development laboratories but also in the industry as a routine quality control tool.

Coupling Raman spectroscopy and drop tensiometry for in situ monitoring of radical polymerization in a single monomer droplet

2018 ◽  
Vol 49 (12) ◽  
pp. 2046-2049 ◽  
Author(s):  
Elise Dropsit ◽  
Jacques Desbrières ◽  
David Chapron ◽  
Sandrine Hoppe ◽  
Alain Durand ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Radical Polymerization ◽  
In Situ Monitoring ◽  
Monomer Droplet

In situ monitoring of NiO–Al2O3 nanoparticles synthesis by thermo-Raman spectroscopy

2010 ◽  
Vol 119 (1-2) ◽  
pp. 86-92 ◽  
Author(s):  
Anil Vithal Ghule ◽  
Kalyani Ghule ◽  
Tushar Punde ◽  
Jen-Yu Liu ◽  
Shin-Hwa Tzing ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
In Situ Monitoring ◽  
Al2o3 Nanoparticles ◽  
Nanoparticles Synthesis

A Novel Classification Method for Multispectral Imaging Combined with Portable Raman Spectroscopy for the Analysis of a Painting by Vincent Van Gogh

2013 ◽  
Vol 67 (11) ◽  
pp. 1234-1241 ◽  
Author(s):  
Anna Cesaratto ◽  
Austin Nevin ◽  
Gianluca Valentini ◽  
Luigi Brambilla ◽  
Chiara Castiglioni ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Multispectral Imaging ◽  
Classification Method ◽  
Van Gogh ◽  
Vincent Van Gogh ◽  
Portable Raman Spectroscopy ◽  
Portable Raman

Kinetics of optical clearing of human skin studied in vivo using portable Raman spectroscopy

2020 ◽  
Vol 17 (10) ◽  
pp. 105601
Author(s):  
Qingyu Lin ◽  
Ekaterina N Lazareva ◽  
Vyacheslav I Kochubey ◽  
Yixiang Duan ◽  
Valery V Tuchin
Keyword(s):  
Raman Spectroscopy ◽  
Human Skin ◽  
Optical Clearing ◽  
Portable Raman Spectroscopy ◽  
Kinetics Of ◽  
Portable Raman
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