Estimation of phytochemical constituents and in vitro antioxidant potencies of Brachychiton populneus (Schott & Endl.) R.Br.

Table 2 Estimation of plant extraction yield, total phenolics, flavonoids, tannins, antioxidant capacity and reducing power of Brachychiton populneus leaves

Sample	Yield (g)^g	Total phenolic contents expressed as gallic acid equivalents (mg/g of extract)	Total flavonoid contents expressed as rutin equivalents (mg/g of extract)	Total tannin content expressed as gallic acid equivalents (mg/g of extract)	Total antioxidant capacity expressed as ascorbic acid equivalents (mg/g of extract)	Total reducing power expressed as ascorbic acid equivalents (mg/g of extract)
BPM	50	156.6 ± 1.17^d	99.1 ± 1.05^d	280.43 ± 0.5^c	685.4 ± 2.05^c	885.4 ± 2.06^d
BPH	13	139.4 ± 2^f	70.9 ± 2^f	53.8 ± 0.36^f	555.6 ± 1.1^e	822.3 ± 1.8^f
BPC	7.8	149.2 ± 2.1^e	78.6 ± 1.3^e	72.5 ± 0.65^e	592.5 ± 1.37^d	850.19 ± 2.6^e
BPE	1.5	174.4 ± 1.2^b	119.7 ± 2.1^b	383.63 ± 0.8^a	759.03 ± 2.28^b	956.2 ± 1.71^b
BPB	8.5	162.9 ± 0.9^c	107.7 ± 1.4^c	235.3 ± 0.6^d	685.4 ± 1.29^c	933.6 ± 3.04^c
BPA	17	189.2 ± 1.6^a	126.7 ± 1.15^a	351.17 ± 0.7^b	851.65 ± 2.2^a	988.34 ± 2.1^a

BPM: B. populneus methanol extract; BPH: B. populneus n-hexane fraction; BPC: B. populneus chloroform fraction; BPE: B. populneus ethyl acetate fraction; BPB: B. populneus butanol fraction; BPA: B. populneus aqueous fraction
Each value is represented as mean ± SD (n = 3). Means with different superscript (^a−f) letters in the rows are significantly (p < 0.01) different from one another
^gYield of BPM is based on the dry powder; the yield of its fractions is based on the yield of BPM

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