Identification of adulterants (sunflower oil and soybean  oil) in grapeseed oil (Vitis vinifera L.) and chia oil (Salvia  hispanica L.) by FT-MIR spectroscopy and chemometric

Carolina Berenice Velázquez-Rendón; Ofelia Gabriela Meza-Márquez; Tzayhri Gallardo-Velázquez

doi:10.9755/ejfa.2022.v34.i7.2902

Authors

Carolina Berenice Velázquez-Rendón 1 Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas-Santo Tomás. Departamento de Biofísica. Prolongación de Carpio y Plan de Ayala S/N. Col. Santo Tomás. Alcaldía Miguel Hidalgo. C.P. 11340. Ciudad de México, México
Ofelia Gabriela Meza-Márquez 2 Instituto Politécnico Nacional. Escuela Nacional de Ciencias Biológicas-Zacatenco. Departamento de Ingeniería Bioquímica. Av. Wilfrido Massieu S/N, Esq. Cda. Miguel Stampa. Col. Unidad Profesional Adolfo López Mateos, Zacatenco. Alcaldía Gustavo A. Madero. C.P. 07738. Ciudad de México, México
Tzayhri Gallardo-Velázquez Instituto Politécnico Nacional, Escuela Nacional de Ciencias Biológicas-Santo Tomás. Departamento de Biofísica. Prolongación de Carpio y Plan de Ayala S/N. Col. Santo Tomás. Alcaldía Miguel Hidalgo. C.P. 11340. Ciudad de México, México

DOI:

https://doi.org/10.9755/ejfa.2022.v34.i7.2902

Abstract

Grapeseed and chia oils are important for their fatty acids profile. Both oils are considered gourmet and due their high retail prices they
are susceptible to adulteration. FT-MIR was used with chemometric analysis to identify and quantify the adulterants (sunflower and
soybean oils) in grapeseed and chia oils. A ternary mixture system was designed for each oil using as adulterants sunflower and soybean
oils (2-50%, w/w). Soft independent modelling by class analogy (SIMCA) discriminated adulterated samples and pure samples (100%
of recognition and rejection). Partial least squares (PLS) showed the best calibration result (R2c: ≥ 0.95; SEC: 2.22-2.87) and validation
(R2v: ≥ 0.99; SEP: 2.25-3.13). The models could be applied to identify and quantify two adulterants: sunflower and soybean oils in
grapeseed and chia oils