Hunlun C, de Beer D, Sigge GO, Van Wyk J. Phenolic composition and total antioxidant capacity of South African frozen concentrated orange juice as affected by varietal, seasonal and regional differences.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019;
99:1029-1037. [PMID:
30009498 DOI:
10.1002/jsfa.9267]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 06/14/2018] [Accepted: 07/12/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND
There is epidemiological evidence that fruits and vegetables promote general health due to their phenolic composition. The phenolic composition of three commercially important citrus varieties ('Mandarin', 'Navel' orange and 'Valencia' orange), used for frozen concentrated orange juice (FCOJ) production in South Africa, were evaluated based on variety, production season and geographical region (Western Cape (WC) and Eastern Cape (EC)).
RESULTS
FCOJ from the WC had significantly (P < 0.05) lower titratable acidity (TA) and higher total soluble solids (TSS):TA ratio compared to FCOJ produced in the EC. The 'Navel' FCOJ, irrespective of season and region, had the highest (P < 0.05) phenolic content (sum of quantified compounds, TP). Regional effects were clear for the 'Mandarin' variety, the EC 'Mandarin' FCOJ had the highest TP and WC 'Mandarin' had the lowest. Seasonal differences were less evident. Variation that could be ascribed to regional differences were also found for individual phenolic compounds.
CONCLUSION
Robust data regarding the phenolic profile of FCOJ produced in South Africa, suitable for inclusion in food composition databases, were collected. © 2018 Society of Chemical Industry.
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