Table 3.
Phenolic compounds quantified by HPLC with the calibration curve, correlation coefficient and limits of detection (LOD) and quantification (LOQ).
| Phenolic compounds | Retention time | Calibration curve | R2 | LOD (ppm) | LOQ (ppm) |
|---|---|---|---|---|---|
| Gallic acid | 4.1 | y = 56.859× − 260.94 | 0.8573 | 31.08 | 94.19 |
| Caffeic acid | 8.6 | y = 52.066× − 41.597 | 0.9965 | 4.49 | 13.60 |
| Chlorogenic acid | 9.1 | y = 18.482×− 42.177 | 0.9688 | 13.68 | 41.45 |
| Rutin | 10.3 | y = 127.2×− 61.312 | 0.9961 | 4.79 | 14.50 |
| p-Coumaric acid | 10.7 | y = 7.6719×− 5.4772 | 0.9927 | 6.54 | 19.81 |
| Quercetin | 13.3 | y = 18.443×− 8.9102 | 0.9890 | 8.03 | 24.35 |
| Cinnamic acid | 14.3 | y = 142.04× + 43.786 | 0.9973 | 3.96 | 12.01 |
| Apigenin | 14.56 | y = 22.82× + 1.7425 | 0.9976 | 3.72 | 11.27 |