| Summary: | Mangoes are a good source of dietary antioxidants such as ascorbic acid, carotenoids and
phenolic compounds. This study was aimed at investigating the antioxidant capacity, total reducing
activity, flavonoid, carotenoid and ascorbic acid contents of fresh mango, mango powder and
mango fibre prepared from bacang (Mangifera foetida) fruits. The antioxidant capacities of the mango
extracts were determined using Ferric Reducing Antioxidant Power (FRAP), Trolox Equivalent
Antioxidant Capacity (TEAC) and β-carotene bleaching assays. One-way ANOVA and Turkey
HSD tests were used to analyse statistically the mean differences in antioxidant properties among
the fresh mango, mango powder and mango fibre. Pearson correlation test was used to analyse the
correlation among the studied components at the significant level of P< 0.05. The range of antioxidant
capacity as determined by FRAP, TEAC and β-carotene bleaching assay was 852.8 ± 49.2 to2000.8 ± 112.6 μmol Fe(II)/100 g edible portion (EP), 558.1 ± 78.2 to 960.8 ± 0 μg Trolox/100 g EP and
59.7 ± 1.7 to 92.2 ± 5.7 % respectively. On the other hand, total reducing activity, flavonoid,
carotenoid and ascorbic acid content in the mango extracts were in the range of 122.8 ± 1.8 to 199.8
± 5.3 mg GAE/100 g EP, 493.5 ± 33.5 to 2360.7 ± 45.7 mg catechin/100 g EP, 96.5 ± 7.6 to 153.0 ± 2.9
μg β-carotene/100 g EP and 29.4 ± 0 to 59.4 ± 0 mg ascorbic acid/100 g EP respectively. Based on
one-way ANOVA test, the antioxidant capacity, total reducing activity, flavonoid, carotenoid and
ascorbic acid content were significantly different (P < 0.05) among all mango extracts. The FRAP
and TEAC values were in the order of fresh mango > mango fibre > mango powder whereas for β-
carotene bleaching assay, the order was mango fibre > mango powder > fresh mango. Total
reducing activity, flavonoid and carotenoid content in mango extracts were in the order of mango
fibre > fresh mango > mango powder while the ascorbic acid content in mango extracts was in the
order of mango fibre > mango powder > fresh mango. Pearson correlation coefficient showed that
there was a positive strong and significant correlation (r > 0.8) between FRAP assay with TEAC
assay, total reducing activity, flavonoid and carotenoid content. Also, a strong and significant
correlation (r = 0.95) was observed between β-carotene bleaching assay and ascorbic acid content.
This study indicated that mango fibre possessed the highest antioxidant properties compared with
fresh mango and mango powder.
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