Table 2.
Caffeine and total phenolics content of SI crude and enriched extracts.
| Sample | Yield (%) | Caffeine | ECC | Total Phenolics | |||
|---|---|---|---|---|---|---|---|
| CAE | ECA | GAE | EGA | ||||
| SI1 | 66.58 | 432.57 ± 1.64 e | - | 10.61 ± 0.42 d | - | 4.87 ± 0.28 d | - |
| SI1DI1 | 50.62 | 1333.78 ± 5.51 a | 3.08 | 29.15 ± 1.54 a | 2.75 | 17.09 ± 1.01 a | 3.51 |
| SI1DI2 | DC | 7.62 ± 0.18 g | - | 6.54 ± 0.39 e | - | 2.19 ± 0.26 e | - |
| SI1RE1 | 52.87 | 951.76 ± 3.87 d | 2.20 | 26.27 ± 1.61 b | 2.48 | 15.19 ± 1.06 b | 3.12 |
| SI1RE2 | DC | 6.73 ± 0.19 g | - | 4.27 ± 0.27 ef | - | 0.70 ± 0.18 ef | - |
| SI2 | 36.67 | 307.34 ± 1.10 f | - | 9.30 ± 0.24d | - | 4.01 ± 0.16 d | - |
| SI2DI1 | 20.00 | 1278.45 ± 5.28 b | 4.16 | 19.13 ± 0.67 c | 2.06 | 10.48 ± 0.44 c | 2.61 |
| SI2DI2 | DC | 6.94 ± 0.19 g | - | 5.97 ± 1.17 ef | - | 1.82 ± 0.77 ef | - |
| SI2RE1 | 18.00 | 1259.21 ± 5.19 c | 4.10 | 18.23 ± 0.86 c | 1.96 | 9.89 ± 0.57 c | 2.47 |
| SI2RE2 | DC | 6.74 ± 0.19 g | - | 3.80 ± 0.22 f | - | 0.38 ± 0.15 f | - |
Values of caffeine, CAE, and GAE expressed in mg/L (mean ± standard deviation). Different letters within the same column represent significant differences between samples at p < 0.05. ECC, enhance on caffeine content; ECA, enhance on chlorogenic acid content; EGA, enhance on gallic acid content; CAE, chlorogenic acid equivalents; GAE, gallic acid equivalents; DC, discarded fractions containing sugar and chlorophylls.