Extraction of phenolic compounds from acerola by-products using chitosan solution, encapsulation and application in extending the shelf-life of guava

Author(s)

da Silva, Natalia Cristina ^{[1, 2]} ; de Barros-Alexandrino, Tais Teo ^{[3, 4]} ; Garrido Assis, Odilio Benedito ^[3] ; Martelli-Tosi, Milena ^{[1, 2, 5]}

Affiliation

^[1] Univ Sao Paulo, Dept Engn Alimentos, Fac Zootecnia & Engn Alimentos, Rua Duque de Caxias Norte 225, BR-13635900 Pirassununga, SP - Brazil

^[2] Univ Sao Paulo, USP FZEA, Postgrad Programme Mat Sci & Engn, Av Duque de Caxias Norte 225, BR-13635900 Pirassununga - Brazil

^[3] Embrapa Instrumentacao, Natl Nanotechnol Lab Agr, Rua 15 Novembro 1452, BR-13561206 Sao Carlos, SP - Brazil

^[4] Univ Fed Sao Carlos, UFSCar, Postgrad Program Biotechnol, Rodovia Washington Luis Km 235, Sao Carlos, SP - Brazil

^[5] Univ Sao Paulo, Fac Filosofia Ciencias & Letras, Dept Quim, Av Bandeirantes 3900, BR-14040901 Ribeirao Preto, SP - Brazil

• Document type: Journal article
• Source: Food Chemistry; v. 354, AUG 30 2021.
• Web of Science Citations: 0

Abstract

Aiming the simplification of the production of chitosan nanoparticles as an encapsulating material, the primary approach of this study was to investigate the extraction of active compounds from acerola-pulp by-products directly in chitosan solution by using tip sonication. The results have shown that chitosan solution can be used as a good solvent, mainly for total phenolic compounds (TPC) extraction (1792.7 mg/100 g of dry by-product). The extract was submitted to ionic gelation process using, as counter-ion, the sodium tripolyphosphate to form loaded nanoparticles with TPC. The suspension was applied as protective coatings on the guavas. The nanoengineered coatings provided an effective barrier that delayed the maturation and maintained the green pigmentation for longer periods along with good firmness. To the best of our knowledge, this was the first study that uses chitosan solution as extraction solvent of TPC from food byproducts in order to facilitate the encapsulation process. (AU)

• FAPESP's process: 16/18788-1 - Raman microspectroscopy and chemometrics for the characterization of polymer-based microcarrier systems of active/photoactive compounds
• Grantee: Milena Martelli Tosi
• Support Opportunities: Regular Research Grants
• FAPESP's process: 19/23171-1 - Byproducts recovery from food processing: extraction of phytochemical compounds, encapsulation and application in biodegradable films / coatings
• Grantee: Milena Martelli Tosi
• Support Opportunities: Regular Research Grants