Determination of Synthetic Food Antioxidants in Multicomponent Mixtures Using UV-Visible Spectrophotometry and Partial Least-Squares Calibration

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Determination of quaternary, ternary, and binary mixtures and single determination of butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), tert-butylhydroquinone (TBHQ), and nordihydroguaiaretic acid (NDGA) have been made by using a partial least-squares (PLS) model. A calibration set containing between 2 to 80 μg mL-1 of BHA, TBHQ, and NDGA and 10 to 200 μg mL-1 of BHT was used, and a model was optimized by using a cross-validation process. Relative standard deviation values between 0.1 and 2.1% for BHA, between 0.2 and 2.1% for BHT, between 0.4 and 8.3% for NDGA, and between 1.2 and 1.3 for TBHQ were calculated. The resolution of quaternary mixtures was tested in sunflower oil samples.

Keywords: Antioxidant; Partial least-squares method; Sunflower oil analysis

Document Type: Research Article


Affiliations: 1: Department of Analytical Chemistry, University of Extremadura, 06071 Badajoz, Spain 2: Department of Analytical Chemistry, University of Granada, 18071 Granada, Spain

Publication date: April 1, 1996

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