Anthocyanin content in relation to the antioxidant activity and colour properties of Garcinia mangostana peel Syzigium cumini and Clitoria ternatea extracts

Siti Azima A. M., . and Noriham A., . and Manshoor N., . Anthocyanin content in relation to the antioxidant activity and colour properties of Garcinia mangostana peel Syzigium cumini and Clitoria ternatea extracts. pp. 2369-2375. ISSN 22317546

The plant extract serves not only as a good source of bioactive compounds but also as natural pigment that can be applied as colourants in food and pharmaceutical products. The aim of this study were to determine the anthocyanin content of Garcinia mangostana peel extract (GMPE) Clitoria ternatea extract (CTE) and Syzigium cumini extract (SCE) in relation to their antioxidant activity and their colour properties. The antioxidant activities related to the phenolic constituents including anthocyanin content were determined based on the EC50 of DPPH radical scavenging activity and Ferric Reducing Antioxidant Power (FRAP) assay. The colour properties of the plant extracts were measured based on their degradation index (DI) indices of polymeric colour (PC) and colour density (CD). GMPE showed higher FRAP value and lower EC50 value which were 79.37 mmoles/g and 0.11 mg/ml respectively as compared to SCE extract with FRAP value 25.66 mmoles/g and EC50 value 0.22 mg/ml. Total monomeric anthocyanin (tmAcy) exhibited a strong correlation between FRAP assay (r2 0.998) and DPPH assay (r2 0.859). GMPE showed high CD (1.63 AU) moderate PC (0.18 AU) but low in DI (1.19 AU) while SCE exhibited low in CD (0.55 AU) and PC (0.07 AU) but moderate DI (1.26 AU). CTE exhibited high in DI (5.39 AU) and PC (0.19 AU) but moderate in CD (0.55). Hence it can be concluded that colour pigment obtained from GMPE exhibited high antioxidant activity and better colour properties as compared to SCE and the strong correlation between tmAcy and two antioxidant activity assays which are FRAP and DPPH indicated that monomeric anthocyanin plays a major role in antioxidant activity of these plant extracts.

Full text available from: Official URL: http://ifrj.upm.edu.my/21%20(06)%202014/44%20IFRJ%...

Abstract

The plant extract serves not only as a good source of bioactive compounds but also as natural pigment that can be applied as colourants in food and pharmaceutical products. The aim of this study were to determine the anthocyanin content of Garcinia mangostana peel extract (GMPE) Clitoria ternatea extract (CTE) and Syzigium cumini extract (SCE) in relation to their antioxidant activity and their colour properties. The antioxidant activities related to the phenolic constituents including anthocyanin content were determined based on the EC50 of DPPH radical scavenging activity and Ferric Reducing Antioxidant Power (FRAP) assay. The colour properties of the plant extracts were measured based on their degradation index (DI) indices of polymeric colour (PC) and colour density (CD). GMPE showed higher FRAP value and lower EC50 value which were 79.37 mmoles/g and 0.11 mg/ml respectively as compared to SCE extract with FRAP value 25.66 mmoles/g and EC50 value 0.22 mg/ml. Total monomeric anthocyanin (tmAcy) exhibited a strong correlation between FRAP assay (r2 0.998) and DPPH assay (r2 0.859). GMPE showed high CD (1.63 AU) moderate PC (0.18 AU) but low in DI (1.19 AU) while SCE exhibited low in CD (0.55 AU) and PC (0.07 AU) but moderate DI (1.26 AU). CTE exhibited high in DI (5.39 AU) and PC (0.19 AU) but moderate in CD (0.55). Hence it can be concluded that colour pigment obtained from GMPE exhibited high antioxidant activity and better colour properties as compared to SCE and the strong correlation between tmAcy and two antioxidant activity assays which are FRAP and DPPH indicated that monomeric anthocyanin plays a major role in antioxidant activity of these plant extracts.

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Item Type:	Article
AGROVOC Term:	Anthocyanins
AGROVOC Term:	Antioxidants
AGROVOC Term:	Colour
AGROVOC Term:	Garcinia mangostana
AGROVOC Term:	Syzygium cumini
AGROVOC Term:	Clitoria ternatea
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	26 Apr 2025 15:55
URI:	http://webagris.upm.edu.my/id/eprint/21945

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