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|Type:||Artigo de periódico|
|Title:||Minimization of peroxide formation rate in soybean oil by antioxidant combinations|
da Silva, MAAP
|Abstract:||The objective of this work was to minimize peroxide formation rates in refined soybean oil packaged in PVC bottles. The experiment was conducted according to a central composite design for four variables, namely, concentrations of TBHQ, beta-carotene and citric acid in the oil, and Tinuvin P(R) (UV-absorber) in the bottles. The samples were stored at 1720 1x and 25 degreesC during 6 months. Peroxide values were measured monthly, and the mean peroxide formation rate (PFR) during storage time was calculated. PFR was highly correlated to odor changes, measured as differences-from-control at the end of storage time. TBHQ was the most effective antioxidant, followed by Tinuvin P(R). beta-Carotene impaired the color acceptance of the oil. The following antioxidant ranges were suggested to decrease PFR without promoting oil rejection: 150-200 mg kg(-1) of TBHQ, not more than 11 mg kg(-1) of beta-carotene, 30 mg kg(-1) of citric acid, and 3-4 g kg(-1) of Tinuvin P. (C) 2004 Elsevier Ltd. All rights reserved.|
|Editor:||Elsevier Science Bv|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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