Anthocyanin stabilization by chitosan-chondroitin sulfate polyelectrolyte complexation integrating catechin co-pigmentation. (1st February 2018)

• Record Type: Journal Article
• Authors: Tan, Chen; Selig, Michael Joseph; Abbaspourrad, Alireza
• Is Part Of: Carbohydrate polymers. Volume 181(2018)
• Page Start: 124
• Page End: 131
• Publication Date: 2018-02-01
• Subjects: Anthocyanin -- Polyelectrolyte complexation -- Co-pigmentation -- Chitosan; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2017.10.034
• Languages: English
• ISSNs: 0144-8617

Abstract

Highlights: Polyelectrolyte complexation of chitosan and chondroitin sulfate is optimized. The fabrication does not introduce any external high energy or an organic solvent. Integration of catechin co-pigmentation further improves anthocyanin stability. The composite system has great potential as carrier for water-soluble antioxidants. Abstract: The thermochemical instability of anthocyanins (ATC) presents a challenge to their utilization as natural colorants in many food systems. This is addressed herein with the development of polysaccharide based carriers formed by combined encapsulation and copigmentation approaches which utilize polyelectrolyte complexation between chitosan and chondroitin sulfate (CS). At pH 3, a 1.5 mg/mL and 1:1 wt ratio mix of both polysaccharides produced hydrophilic and positively charged polyelectrolyte complexes (PECs) with which a maximum ATC encapsulation efficiency of 88% could be achieved using a 1:6 elderberry extract as the ATC source. ATC coupled with EGCG co-pigmentation achieved the highest encapsulation efficiencies. Storage studies showed the combination of polysaccharide encapsulation and EGCG copigmentation improved ATC stability against elevated temperature and ascorbic acid. Copigmented PECs were shown to retain ATC color at a rate more than 3-fold greater than of non-encapsulated ATC, and, furthermore, were shown to improve and preserve ATC anti-oxidant activity and stability during storage.