Autor(es): Correia, Paula ; Guiné, Raquel ; Gonçalves, Fernando ; Oliveira, Solange
Data: 2017
Identificador Persistente: http://hdl.handle.net/10400.19/4563
Origem: Repositório Científico do Instituto Politécnico de Viseu
Assunto(s): Physalis peruviana; Extraction; Phenolic compounds; Antioxidant activity
Physalis peruviana L. is appreciated for its organoleptic characteristics, besides being rich in many beneficial compounds. Because its characteristics are yet not fully understood, the present work aimed at studying some of its chemical properties and bioactive phenols and the corresponding antioxidant activity. For obtaining the phenolic extracts three methods with different combinations of extracting solvents were essayed and the evaluation of total phenols, ortho-diphenols, flavonoids and antioxidant activity by DPPH and ABTS were done following established methodologies. The results showed that P. peruviana had important amounts of fibre, vitamin C and carotenoids. Regarding the methods for extraction of phenolic compounds, the most efficient were those in which a combination of the solutions methanol:water and acetone:methanol were used. The phenolic compounds contents were quantified as being p to 59.9 mg GAE/100 g, flavonoids up to 0.340 mg QE/100 g and ortho-diphenols up to 94.6 mg GAE/100 g. The antioxidant activity ranged between 7.7 and 9.6 µmol TE/g for method DPPH and between 12.3 and 13.7 µmol TE/g for method ABTS.
