Table 2.
Chlorogenic acids (CGAs) and caffeine content in the analyzed coffee brew samples. Results expressed as the average value ± standard deviation. Differences between groups were statistically analyzed with Tukey’s test; p < 0.05 was considered significant.
| Compound | Espresso | Americano | Instant Coffee |
|---|---|---|---|
| Average (mg/100 mL) ± SD | Average (mg/100 mL) ± SD | Average (mg/100 mL) ± SD | |
| 3-CQA | 19.09 ± 0.49 | 2.12 ± 0.01 | 8.47 ± 0.34 |
| 4-CQA | 29.09 ± 0.08 | 3.23 ± 0.03 | 11.17 ± 0.42 |
| 5-CQA | 110.14 ± 2.12 | 12.34 ± 0.09 | 37.21 ± 0.61 |
| 3-pCoQA | 0.08 ± 0.01 | 0.01 ± 0.00 | 0.01 ± 0.00 |
| 5-pCoQA | 5.78 ± 0.21 | 0.84 ± 0.01 | 1.08 ± 0.01 |
| 3-FQA | 2.74 ± 0.22 | 0.32 ± 0.01 | 1.43 ± 0.01 |
| 4+5-FQA | 42.83 ± 0.51 | 4.76 ± 0.05 | 21.36 ± 0.71 |
| 3,4-diCQA | 6.47 ± 0.21 | 0.72 ± 0.02 | 1.75 ± 0.01 |
| 3,5-diCQA | 3.41 ± 0.11 | 0.38 ± 0.01 | 1.58 ± 0.01 |
| 3,4-FCQA | 0.22 ± 0.01 | 0.02 ± 0.00 | 0.11 ± 0.00 |
| 4,5-CFQA | 0.60 ± 0.01 | 0.07 ± 0.00 | 0.37 ± 0.00 |
| Caffeine | 331.59 ± 5.12 | 41.82 ± 0.63 | 124.05 ± 3.12 |
| Total CGAs | 220.45 ± 9.50 | 24.81 ± 0.03 | 84.56 ± 0.26 |