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Artigo Acesso aberto Produção Nacional Revisado por pares
BIBTEX RIS

ENCAPSULATION OF L-ASCORBIC ACID WITHIN THE NATURAL BIOPOLYMER-GALACTOMANNAN-USING THE SPRAY-DRYING METHOD: PREPARATION, CHARACTERIZATION, AND EVALUATION OF ANTIOXIDANT ACTIVITY

2015; Brazilian Chemical Society; Linguagem: Inglês

10.5935/0100-4042.20150104

ISSN

1678-7064

Autores

Carlos Alberto Gomes de Souza, Sônia Maria Costa Siqueira, Antônia Fádia Valentim de Amorim, Selene Maia de Morais, Tamara Gonçalves, Rayane Nunes Gomes, Arcelina Pacheco Cunha, Nágila Maria Pontes Silva Ricardo,

Tópico(s)

Polysaccharides Composition and Applications

Resumo

In this study, the spray drying technique was used to prepare L-ascorbic acid (AA) microparticles encapsulated with galactomannan-an extract from the seeds of the Delonix regia species.The physico-chemical characteristics, antioxidant activity, and encapsulation efficiency of the AA microparticles were evaluated and characterized using thermogravimetric analysis, differential scanning calorimetry, infrared spectroscopy, X-ray diffraction, and scanning electron microscopy.The free-radical scavenging activity of the AA microparticles was determined at different environmental conditions using DPPH (1,1-diphenyl-2-picryl-hydrazyl).X-ray diffraction measurements demonstrated a loss of crystallinity in AA after the encapsulation process, and a DSC scan also showed the loss of the compound's melting peak.Thermogravimetric analysis showed small differences in the thermal stability of galactomannan before and after the incorporation of AA.The mean diameters of the obtained spherical microspheres were in the range of 1.39 ± 0.77 µm.The encapsulation efficiency of AA microparticles in different environmental conditions varied from 95.40 to 97.92, and the antioxidant activity showed values ranging from 0.487 to 0.550 mg mL -1 .

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