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Fast non-invasive screening to detect fraud in oil capsules

Authors :
Paulo Henrique Março
Luiza Mariano Leme
Patrícia Valderrama
Ailey Aparecida Coelho Tanamati
Fábio Nakamura
Source :
LWT. 109:179-185
Publication Year :
2019
Publisher :
Elsevier BV, 2019.

Abstract

This work aimed to propose a methodology to be used as a fast screening method to detect adulteration in oil capsules using Near Infrared (NIR) spectroscopy through Principal Components Analysis (PCA). The experiment consisted in measuring the NIR spectra from 25 different intact oil capsules from different oil/mixtures and, to provide a trustworthy comparison, the oil capsule internal content was extracted to be evaluated by High-Resolution Gas Chromatography (HRGC). In order to be useful, the proposed methodology demands for a known certified set of samples to be used as a target. The ability to detect adulteration was verified comparing between NIR and GC PCA scores disposal, in which 6 samples did not match. Therefore, the methodology suggests that these 6 samples would be evaluated by HRGC in place of the whole set of 25 samples. Thus, NIR spectroscopy could be used as a fast screening method to indicate which samples should be analyzed by gas chromatography, considering that each coinciding sample, i.e. disposed of in agreement to the HRGC PCA score, is already certified by HRGC regarding on their content.

Details

ISSN :
00236438
Volume :
109
Database :
OpenAIRE
Journal :
LWT
Accession number :
edsair.doi...........97b57b703945e357fdd6344beb08850d
Full Text :
https://doi.org/10.1016/j.lwt.2019.03.088