Table 1.
Calibration equations, linear ranges, LODs, and LOQs for the components in ginkgo leaf extracts.
| Components | Linear Range (ng/mL) | Slope | Intercept | R | LOD a (ng/mL) | LOQ b (ng/mL) |
|---|---|---|---|---|---|---|
| Bilobalide | 5–3000 | 0.5043 | 0.0020 | 0.9952 | 2 | 5 |
| Ginkgolide A | 5–1000 | 0.0866 | 0.0006 | 0.9937 | 2 | 5 |
| Ginkgolide B | 5–1000 | 0.3158 | 0.0036 | 0.9990 | 2 | 5 |
| Ginkgolide C | 5–1000 | 0.2241 | 0.0032 | 0.9982 | 2 | 5 |
| Kaempferol | 5–3000 | 0.0070 | −0.0009 | 0.9963 | 3 | 5 |
| Quercetin | 5–3000 | 0.1918 | −0.0012 | 0.9928 | 2 | 5 |
| Isorhamnetin | 5–3000 | 0.6044 | −0.0010 | 0.9977 | 2 | 5 |
a LOD, the limit of detection, was determined based on S/N = 3. b LOQ, the limit of quantitation, was determined based on S/N = 10 and accuracy and precision <20%.