Table 2.
Concentrations and quality parameters of phenolic compounds in PBE.
| Retention Time (min) |
Phenolic Compound | Concentration (mg/g) a | Calibration Curve | Correlation Coefficient (R) |
LOD b (μg/mL) |
LOQ c (μg/mL) |
|---|---|---|---|---|---|---|
| 2.61 | Protocatechuic acid | 5.51 ± 0.00 | y = 10448.33x + 1472.27 | 0.9997 | 0.03 | 0.08 |
| 4.85 | Procyanidin B1 | 13.40 ± 0.18 | y = 1893.37x − 61.05 | 0.9993 | 0.25 | 0.77 |
| 5.45 | Procyanidin B3 | 3.75 ± 0.14 | y = 1863.07x − 24.93 | 0.9998 | 0.12 | 0.36 |
| 5.66 | (+)-Catechin | 10.08 ± 0.68 | y = 1995.57x + 129.22 | 0.9998 | 0.01 | 0.03 |
| 6.47 | Caffeic acid | 0.63 ± 0.01 | y = 14706.33x + 205.35 | 0.9996 | 0.05 | 0.15 |
| 8.18 | (−)-Epicatechin | 0.62 ± 0.01 | y = 1865.40x + 135.90 | 0.9997 | 0.09 | 0.27 |
| 9.73 | Procyanidin B2 | 0.80 ± 0.00 | y = 2351.27x − 89.67 | 0.9998 | 0.04 | 0.13 |
| 11.71 | Taxifolin | 12.91 ± 0.06 | y = 8428.27x + 85.21 | 0.9999 | 0.04 | 0.13 |
| 13.12 | Taxifolin isomer | 2.24 ± 0.01 | y = 8428.27x + 85.21 | 0.9999 | 0.04 | 0.13 |
| 25.08 | Quercetin | 0.26 ± 0.02 | y = 5315.23x − 58.53 | 0.9998 | 0.09 | 0.26 |
a Data are presented as mean ± standard deviation. b Limit of detection. c Limit of quantification.