Optimization of Oil Oxidation by Response Surface Methodology and the Application of this Model to Evaluate Antioxidants

Autor(es)

Branco, Gabriel Favalli ^[1] ; Castro, Inar Alves ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Food & Expt Nutr, Fac Pharmaceut Sci, BR-05508900 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY; v. 88, n. 11, p. 1747-1758, NOV 2011.
• Citações Web of Science: 7

Resumo

The oxidative stability of oils is a complex process influenced by several factors, making the evaluation of antioxidant effects of new compounds difficult. Thus, the objective of this study was to apply a factorial design to obtain the combination of factors that maximizes the formation of oil oxidation products, and use this model to evaluate the antioxidant activity of different compounds. Temperature, Fe(2+) and ascorbyl palmitate were evaluated in two full-factorial designs (2(3) and 3(2)). The validated optimized oxidation model was obtained by adding 1.47 mmol/L of Fe(2+) and 1.54 mmol/L of ascorbyl palmitate to flaxseed oil stripped of tocopherol kept at 40 A degrees C for 8 days. Antioxidant activities of six compounds were evaluated using this model. All antioxidant samples were statistically different (p < 0.001) at 200 ppm concentration, indicating the efficiency of the optimized model to evaluate the antioxidant action of natural and synthetic compounds. (AU)

• Processo FAPESP: 08/09296-1 - Aplicação de técnicas fatoriais de planejamento no desenvolvimento de um modelo para avaliação da oxidação em ácidos graxos e emulsões.
• Beneficiário: Inar Castro Erger
• Modalidade de apoio: Auxílio à Pesquisa - Regular