Effects of gallic acid alkyl esters and their combinations with other antioxidants on oxidative stability of DHA algae oil. (May 2021)

• Record Type: Journal Article
• Authors: Shen, Yan; Guo, Chao; Lu, Ting; Ding, Xu-Yang; Zhao, Man-Tong; Zhang, Min; Liu, Hui-Lin; Song, Liang; Zhou, Da-Yong
• Is Part Of: Food research international. Volume 143(2021)
• Publication Date: 2021-05
• Subjects: DHA algae oil -- Gallic acid alkyl esters -- Composite antioxidants -- Accelerated storage -- Shelf life prediction -- Rancimat induction time; n-3 PUFAs omega-3 polyunsaturated fatty acids -- EPA eicosapentaenoic acid -- DHA docosahexaenoic acid -- TPP tea polyphenol palmitate -- GA gallic acid -- MG methyl gallate -- EG ethyl gallate -- PG propyl gallate -- BG butyl gallate -- HG hexyl gallat -- OG octyl gallate -- LG lauryl gallate -- MYG myristyl gallate -- HEG hexadecyl gallate -- SG stearyl gallate -- AOB antioxidant of bamboo leaves -- RE rosemary extracts -- TP tea polyphenols -- AP ascorbyl palmitate -- VE vitamin E -- PA phytic acid -- PL phospholipid -- RIT Rancimat induction time -- POV peroxide value -- TBARS thiobarbituric acid-reactive substances -- ASLT accelerated shelf life testing -- TLC-FID thin-layer chromatography-flame ionization detection -- ESR electron spin resonance -- GA-C14 myristate gallate -- DOPC dioleoylphosphatidylcholine -- EGCG epigallocatechin gallate -- BHT butylated hydroxytoluene -- TBHQ tert-butylhydroquinone -- BHA butylated hydroxyanisole; Food -- Analysis -- Periodicals; Food industry and trade -- Periodicals; Food industry and trade -- Canada -- Periodicals; Food Technology -- Periodicals; Food -- Periodicals; Food-Processing Industry -- Periodicals; Aliments -- Industrie et commerce -- Périodiques; Aliments -- Industrie et commerce -- Canada -- Périodiques; Aliments -- Recherche -- Périodiques; Food industry and trade; Canada; Periodicals; Electronic journals; 664.005
• DOI: 10.1016/j.foodres.2021.110280
• Languages: English
• ISSNs: 0963-9969

Abstract

Graphical abstract: Highlights: GA alkyl ester with the best antioxidant effect in DHA algae oil was selected. Octyl gallate showed the best antioxidant effect among ten GA alkyl esters. Octyl gallate was used in combination with other antioxidants. DHA algae oil containing octyl gallate and TPP was the most stable to oxidation. The optimum composite antioxidant extended 4.24-fold shelf life of DHA algae oil. Abstract: The most effective composite antioxidants for DHA algae oil were optimized by combining the selected gallic acid (GA) alkyl ester with other commonly used antioxidants. Results of Rancimat induction time, peroxide value, thiobarbituric acid-reactive substances, and free radical generation indicated that octyl gallate (OG) was the best one in DHA algae oil among GA alkyl esters with various chain lengths. Therefore, OG was used to combine other antioxidants (antioxidant of bamboo leaves, rosemary extract, tea polyphenols, tea polyphenol palmitate (TPP), ascorbyl palmitate, vitamin E, phytic acid and phospholipid) for further improving the oxidative stability of DHA algae oil. The combination of OG + TPP showed the best antioxidant effect among the composite antioxidants of two and three components. Through optimization of mixture ratio, the combination of 53.20 mg/kg OG + 360 mg/kg TPP demonstrated the best antioxidant capacity, which prolonged the shelf life of DHA algae oil by 4.24 folds.