Table 1. Phenolic contents in different extracts (A, B and C) from apple skin.

Apple variety

Extract

Phenolic compounds

Totals

Flavonoids

Non-Flavonoids

Granny Smith

A

6.80* ± 0.15

6.69 ± 0.50

0.11 ± 0.09

B

5.08 ± 0.08

4.96 ± 0.50

0.12 ± 0.04

C

3.02 ± 0.08

2.89 ± 0.25

0.13 ± 0.10

Royal Gala

A

3.49 ± 0.14

3.27 ± 0.30

0.22 ± 0.02

B

1.99 ± 0.08

1.78 ± 0.15

0.21 ± 0.05

C

2.60 ± 0.13

2.31 ± 0.18

0.29 ± 0.16

* mgGAE/g, A: acetone: water: acetic acid, B: ethyl acetate: methanol: water, C: ethanol: water.

Supported by UNESCO / MIRCEN network