Table A5.
Retention times (RTs), λ max, λ for eq., equation curves, linearity ranges, R2, limit of detection (LOD), and limit of quantification (LOQ) for all of the identified standard compounds (ST).
| Compound | RT (min) | λ max (nm) | λ for eq. (nm)/HPLC method | Equation Curve (mg/mL) | Lin. Range (mg/mL) | R 2 | LOD (mg/mL) | LOQ (mg/mL) |
|---|---|---|---|---|---|---|---|---|
| Gallic acid | 10.7 | 272 | 280 (Pol) | y = 57569151.7x | 0.0012–0.582 | 0.9997 | 0.0005 | 0.0012 |
| Quercetin a | - a | 355 | 340 (Pol) | y = 62735637.1x – 8816.1 | 0.0012–0.100 | 1.0000 | 0.0006 | 0.0012 |
| (+)-Catechin | 16.2 | 233.5, 281.6 | 280 (Cat) | y = 16107243.3x – 131.6 | 0.002–0.100 | 0.9993 | 0.001 | 0.002 |
| ε-viniferin | 35.1 | 233.5, 325.6 | 340 (Pol) | y = 77687802.0x – 155,501 | 0.0011–0.043 | 0.9998 | 0.0005 | 0.0011 |
a Quercetin was used as the reference compound for the quantification of its derivatives, the Rt is therefore different from those of the compounds in the extracts.