Phenolic Composition and Radical Scavenging Capacity of Vaccinium Bracteatum Thunb. Leaves

Figures & data

Table 1 Total phenolic contents (TPC) and yields of VBTL extracts.*

Parameters	TPC (mg GAE/g extract)	Yield (mg GAE/g VBTL)
Water extract	10.86 ± 0.11^a	0.93 ± 0.05^a
Ethanol extract	25.87 ± 0.12^c	4.62 ± 0.03^b
Methanol extract	21.09 ± 0.23^b	4.50 ± 0.05^b
*Values were the means of three replicates ± standard deviation (SD). Values with different letters in the same column were significantly (p < 0.05) different.

Table 2 DPPH free radical scavenging activities (I%) of VBTL extracts.*

Concentration (μg/mL)	50	100	150	200
Water extract	17.66 ± 0.80^a	30.49 ± 0.72^a	37.54 ± 0.81^a	49.77 ± 0.66^a
Ethanol extract	33.61 ± 0.57^c	47.29 ± 0.84^c	59.18 ± 0.67^c	73.34 ± 0.53^d
Methanol extract	26.11 ± 0.71^b	40.38 ± 0.64^b	48.68 ± 0.64^b	61.28 ± 0.68^b
BHT	34.01 ± 0.72^c	48.37 ± 0.69^c	60.85 ± 0.72^c	67.80 ± 0.84^c
Vc	40.03 ± 0.64^d	65.48 ± 0.64^d	77.19 ± 0.60^d	88.26 ± 0.51^e
*Values were the means of three replicates ± standard deviation (SD). Values with different letters in the same column were significantly (p < 0.05) different.

Table 3 Phenolic compound contents (mg/g extract) of ethanol extract of VBTL by HPLC

Compound	Retention time (min)	Content mg/g extract
Quercetin	20.91	9.70 ± 0.12
Kaempferol	22.12	1.22 ± 0.07
Luteolin	23.89	3.92 ± 0.23
Apigenin	24.47	2.48 ± 0.18
Chrysin	27.61	1.36 ± 0.15
*Values were the means of three replicates ± standard deviation (SD).