Journal
JOURNAL OF CHEMOMETRICS
Volume 36, Issue 7, Pages -Publisher
WILEY
DOI: 10.1002/cem.3426
Keywords
hand sanitizing; infrared spectroscopy; partial least squares; principal component regression; Raman spectroscopy
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Funding
- CNPq [304738/2019-0, 409175/2018-8]
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This study investigates the determination of alcohol concentration in gel-based hand sanitizers using spectroscopic techniques and principal component regression. The results show that this method is fast, low-cost, and safe for determining alcohol concentration in commercial samples.
The international public health emergency related to COVID-19 caused by the SARS-CoV-2 virus has altered several production and registration criteria for sanitary products, including alcohol-based hand sanitizers. In this work, we investigate the concentration of alcohol in sanitizers presented in gel form applying the principal component regression method on measurements using Infrared and Raman spectroscopic methods. The chemometric calibration is performed using isopropanol or ethanol as active agents, and the method is used to characterize several commercial samples. Furthermore, the results of the prediction of alcohol concentration, obtained by applying the principal component regression and partial least squares methods, in the spectroscopic techniques, were compared with each other and with the results provided by nuclear magnetic resonance. Our results show that spectroscopic techniques coupled with principal component regression are fast, low-cost, and safe tools for the determination of alcohol concentration, regardless the gelling agent used.
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