4. Initial Phenolic Compounds’ Extraction Rate, Concentration of Phenolic Compounds, and Relative Extraction Efficiency after 3 h of Extraction, and Fitted Parameters on the Kinetics Obtained with Different Solid–Liquid Ratios (0.5–1.5 g 100 mL–1).
| solid–liquid ratio (g 100 mL–1) | 0.5 | 1.0 | 1.5 |
|---|---|---|---|
| phenolic compounds’ extraction rate at the initial 15 min (mg GAE L–1 min–1) | 17.0 | 25.1 | 45.2 |
| concentration of phenolic compounds at 3 h of extraction (mg GAE L–1) | 520 | 942 | 1331 |
| relative extraction efficiency of phenolic compounds at 3 h of extraction (mg GAE g–1 yerba mate) | 104 | 94.2 | 88.7 |
| Peleg | |||
| k 3 (min L mg–1 GAE) | 4.29 × 10–2 | 2.58 × 10–2 | 1.14 × 10–2 |
| k 4 (L mg–1 GAE) | 1.63 × 10–3 | 9.10 × 10–4 | 6.81 × 10–4 |
| MRE | 0.043 | 0.051 | 0.027 |
| average MRE | 0.040 | ||