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Quantification of adulterations in extra virgin flaxseed oil using MIR and PLS
Letícia Maria de Souza1, Felipe Bachion de Santana1, Lucas Caixeta Gontijo2
1Institute of Chemistry, Federal University of Uberlândia, Santa Mônica Campus, 38408-100 Uberlândia, Minas Gerais, Brazil.
Abstract:
This paper proposes a new method for the quantitative analysis of soybean oil (SO) and sunflower oil (SFO) as adulterants in extra virgin flaxseed oil (EFO) by applying Mid Infrared Spectroscopy (MIR) associated with chemometric technique of Partial Least Squares (PLS). The PLS models were built in accordance with standard method ASTM E1655-05 and these showed good correlation between the reference values and those calculated using the PLS models with low error values, with R = 0.998 for SFO and R = 0.999 for SO in EFO. These models were validated analytically in accordance with Brazilian and international guidelines through the estimate of figures of merit parameters, thus showing an effective and feasible method to control the quality of extra virgin flaxseed oil.
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