Effects of Modified DATEMs with Different Alkyl Chain Lengths on Improving Oxidative and Physical Stability of 70% Fish Oil-in-Water Emulsions

• Published in: Journal of agricultural and food chemistry Vol. 66; no. 47; pp. 12512 - 12520
• Main Authors: Yesiltas, Betül, García-Moreno, Pedro J, Sørensen, Ann-Dorit M, Anankanbil, Sampson, Guo, Zheng, Jacobsen, Charlotte
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 28.11.2018
• Subjects: Antioxidants - chemistry; Caseins - chemistry; Diglycerides - chemistry; Drug Stability; Emulsions - chemistry; Fish Oils - chemistry; Oxidation-Reduction; Tartrates - chemistry; Water - chemistry; modified emulsifiers; oil−water interface; DATEM and sodium caseinate; lipid oxidation; caffeic acid; high fat delivery emulsions
• ISSN: 0021-8561; 1520-5118
• DOI: 10.1021/acs.jafc.8b04091

The objective of this study was to produce oxidatively and physically stable 70% fish oil-in-water emulsions by combined use of sodium caseinate (CAS), commercial diacetyl tartaric acid esters of mono- and diglycerides (DATEM), and modified DATEM. First, the optimal formula was determined using DATEM and CAS. Subsequently, modified DATEMs (DATEM C12 and DATEM C14) were designed for investigating both the effects of different alkyl chain lengths and caffeic acid conjugation to the emulsifier on physical and oxidative stability of the emulsions. Emulsions produced with modified DATEMs showed better oxidative stability compared with emulsion using commercial DATEM plus an equivalent amount of free caffeic acid, confirming the advantage of having antioxidant covalently attached to the emulsifier. Results indicated that DATEM_C14 replaced more CAS compared with DATEM_C12 from the interface in 70% fish oil-in-water emulsion. Emulsions produced with DATEM_C14 had significantly decreased amounts of primary and secondary oxidation products compared with emulsions using DATEM_C12.