Table 1.
Polyphenolic compounds content in stevia extracts.
| Polyphenolic Compounds [mg/g of Stevia] | |||
|---|---|---|---|
| A | E | GA | |
| Phenolic acids | |||
| Benzoic acid derivatives | 0.10 b ± 0.02 | 0.05 d ± 0.01 | nd |
| Caffeic acid | 0.29 a ± 0.08 | 0.06 d ± 0.02 | 0.19 d ± 0.07 |
| Caffeic acid derivatives | 0.06 c ± 0.02 | 0.03 e ± 0.01 | 0.36 c ± 0.06 |
| Chlorogenic acid | nd | 0.30 b± 0.10 | nd |
| Chlorogenic acid derivatives | nd | 0.14 c ± 0.04 | nd |
| Ferulic acid derivatives | nd | 0.86 a ± 0.08 | 5.50 a ± 0.23 |
| Protocatechuic acid | 0.12 b ± 0.05 | nd | nd |
| Rozmaric acid | nd | 0.36 b ± 0.04 | nd |
| Rozmaric acid derivatives | nd | 0.42 b ± 0.06 | 4.95 a ± 0.66 |
| Salicylic acid derivatives | 0.06 c ± 0.02 | nd | nd |
| Flavonoids | |||
| Campherol derivatives | nd | 0.15 c ± 0.05 | 0.23 d ± 0.08 |
| Catechin | 0.24 a ± 0.04 | nd | nd |
| Catechin derivatives | 0.29 a ± 0.05 | 0.12 c ± 0.02 | nd |
| Epicatechin | nd | 0.11 c ± 0.05 | nd |
| Luteolin | nd | 0.03 e ± 0.01 | nd |
| Luteolin derivatives | nd | 0.01 e ± 0.01 | 0.86 b ± 0.08 |
| Rutin | nd | nd | 0.17 d ± 0.07 |
| Rutin derivatives | nd | 0.12 c ± 0.04 | 1.05 ± 0.09 |
| Total | 1.16 | 2.96 | 13.35 |
Notes: legends: nd—not detected; means, in columns, for the respective components followed by different small letters a–e are significantly different at α = 0.05.