Materials
Refined vegetable oils (sunflower, corn, and soybean) and
dried rosemary leaves were acquired from the local market.
According to the manufacturer specifications, the vegetable
oil samples were free from antioxidants. The synthetic
antioxidant TBHQ (tert-butylhydroquinone) was supplied
by Sigma Aldrich and the remaining reagents and solvents,
of analytical degree, by FMAIA.