Table 3.
Comparison of equilibrium 3-CGA and caffeine concentrations (after 1440 min) extracted using cold and hot brew method along with pH (mean ± 95% Confidence Interval, n = 6).
| Coffee Sample (Roast - Grind) | 3-CGA Concentration (mg/L) | Caffeine Concentration (mg/L) | pH | |||
|---|---|---|---|---|---|---|
| Cold Brew Method | Hot Brew Method | Cold Brew Method | Hot Brew Method | Cold Brew Method | Hot Brew Method | |
| Medium - Medium | 510 ± 20 | 510 ± 30 | 1180 ± 90 | 1040 ± 70 | 5.54 ± 0.02 | 5.41 ± 0.02 |
| Medium - Coarse | 520 ± 40 | 460 ± 40 | 1230 ± 60 | 970 ± 70 | 5.40 ± 0.01 | 5.35 ± 0.03 |
| Dark - Medium | 390 ± 10 | 430 ± 30 | 1080 ± 70 | 1060 ± 70 | 5.53 ± 0.01 | 5.61 ± 0.02 |
| Dark - Coarse | 360 ± 20 | 340 ± 10 | 990 ± 30 | 840 ± 10 | 5.41 ± 0.02 | 5.48 ± 0.02 |