Table 2.
Concentration of 3-CGA and caffeine and pH of each cold brew coffee sample after 400 minutes and 1440 minutes of brewing time (Mean ± 95% Confidence Interval, n = 6).
| Coffee Sample (Roast - Grind) | 400 min | 1440 min | ||||
|---|---|---|---|---|---|---|
| 3-CGA Concentration (mg/L) | Caffeine Concentration (mg/L) | pH | 3-CGA Concentration (mg/L) | Caffeine Concentration (mg/L) | pH | |
| Medium - Medium | 480 ± 60 | 1060 ± 60 | 5.61 ± 0.01 | 510 ± 20 | 1180 ± 90 | 5.54 ± 0.02 |
| Medium - Coarse | 490 ± 30 | 1130 ± 50 | 5.47 ± 0.01 | 520 ± 40 | 1230 ± 60 | 5.40 ± 0.01 |
| Dark - Medium | 380 ± 10 | 970 ± 60 | 5.63 ± 0.01 | 390 ± 10 | 1080 ± 70 | 5.53 ± 0.01 |
| Dark - Coarse | 330 ± 50 | 930 ± 40 | 5.51 ± 0.02 | 360 ± 20 | 990 ± 30 | 5.41 ± 0.02 |