Antioxidative and Antimelanoma Effects of Various Tea Extracts via a Green Extraction Method

Table 2

Five different concentrations with chelating activity of five tea extracts.

Chelating activity (%)
Extracts (µg/ml)	1	5	10	50	100
Maltodextrin	≤5.00	≤5.00	59 ± 0.01	76 ± 0.01	79 ± 0.00
Green tea extract	≤10	≤10	≤10	≤10	14 ± 1.0
Black tea extract	≤10	≤10	20 ± 0.03	19 ± 0.01	25 ± 3.0
Oolong tea extract 861	≤10	≤10	≤10	19 ± 0.01	30 ± 2.0
Oolong tea extract 732	≤10	≤10	≤10	≤10	27 ± 1.0
Jasmine green tea extract	≤10	≤10	18 ± 0.03	≤10	≤10
EDTA	80.76 ± 0.01

Sample consists of 33% maltodextrin. EDTA was used as a positive control on metal chelating ability at 100 μM.