5. Concentration of PC in the Extract of Yerba Mate Obtained in Each Stage of Extraction for the Different Extraction Scenarios .
| scenario | conventional | two-stage | four-stage |
|---|---|---|---|
| concentration of first stage1 | 503.8 ± 7.4 | 976.6 ± 16.0 | 1715.3 ± 9.0 |
| concentration of second stage1 | - | 76.3 ± 6.1 | 221.2 ± 2.0 |
| concentration of third stage1 | - | - | 28.3 ± 1.8 |
| concentration of fourth stage1 | - | - | 7.4 ± 0.4 |
| concentration of the mixture1,2 | 503.8 ± 7.4 | 526.5 ± 11.1 | 493.0 ± 2.9 |
a
Results expressed as mean ± standard deviation. Concentration expressed in mg GAE L–1 (1), and concentration of the mixture calculated according to a mass balance of the concentrations of the individual extraction stages (2).