Citation
Hung Y. C., . and Hsiao Y. H., . and Hsieh J. F., . Catechin content and free radical scavenging activity of Camellia sinensis twig extracts. pp. 248-254. ISSN 22317546
Abstract
The catechin content and antioxidant properties of various Camellia sinensis twig extracts including a water extract (WE) 10 ethanol extract (10 EE) 50 ethanol extract (50 EE) and 95 ethanol extract (95 EE) were investigated. The 50 EE had the highest total phenolic content (161.3 8.5 mg gallic acid equivalents/L) and total flavonoid content (278.9 12.2 mg quercetin equivalents/L). High-performance liquid chromatography analysis suggested that epigallocatechin gallate and epigallocatechin were the predominant catechins in the twig extracts. The relative concentrations of six catechins isolated from the extracts were: 50 EE 10 EE WE 95 EE. The 50 EE showed free radical-scavenging activity. The concentration of dry matter of 50 EE required to scavenge 50 of ABTS radicals was 102.8 4.2 g/mL. These results suggest that 50 EE can potentially be used as a source of catechins.
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Abstract
The catechin content and antioxidant properties of various Camellia sinensis twig extracts including a water extract (WE) 10 ethanol extract (10 EE) 50 ethanol extract (50 EE) and 95 ethanol extract (95 EE) were investigated. The 50 EE had the highest total phenolic content (161.3 8.5 mg gallic acid equivalents/L) and total flavonoid content (278.9 12.2 mg quercetin equivalents/L). High-performance liquid chromatography analysis suggested that epigallocatechin gallate and epigallocatechin were the predominant catechins in the twig extracts. The relative concentrations of six catechins isolated from the extracts were: 50 EE 10 EE WE 95 EE. The 50 EE showed free radical-scavenging activity. The concentration of dry matter of 50 EE required to scavenge 50 of ABTS radicals was 102.8 4.2 g/mL. These results suggest that 50 EE can potentially be used as a source of catechins.
Additional Metadata
| Item Type: | Article |
|---|---|
| AGROVOC Term: | Tea |
| AGROVOC Term: | Camellia sinensis |
| AGROVOC Term: | Catechin |
| AGROVOC Term: | Antioxidants |
| AGROVOC Term: | Chromatography |
| AGROVOC Term: | Statistical analysis |
| AGROVOC Term: | Sampling |
| AGROVOC Term: | Food industry |
| AGROVOC Term: | Polyphenols |
| AGROVOC Term: | Antioxidants |
| Depositing User: | Mr. AFANDI ABDUL MALEK |
| Last Modified: | 24 Apr 2025 00:55 |
| URI: | http://webagris.upm.edu.my/id/eprint/9830 |
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