Table 1.
The TPC and TFC in ethanol extract of H. cuspidatus in different years
| Compounds | Regression equation | r2 | Linear range (mg/ml) | Sample | Contents (mg/g) | RSD (%) |
|---|---|---|---|---|---|---|
| TPC | Y = 0.124X-0.009 | 0.9987 | 0.002–0.005 | H. cuspidatus(2017) | 14.198 ± 0.493 | 3.47 |
| H. cuspidatus(2018) | 13.391 ± 0.381 | 2.85 | ||||
| H. cuspidatus(2019) | 20.588 ± 0.551* | 2.68 | ||||
| TFC | Y = 11.209X-0.007 | 0.9999 | 0.010–0.060 | H. cuspidatus(2017) | 36.669 ± 0.523* | 1.43 |
| H. cuspidatus(2018) | 33.279 ± 0.693* | 2.08 | ||||
| H. cuspidatus(2019) | 44.847 ± 1.013* | 2.26 |
Values are presented in mean ± SD, n = 3. * represents the values of different H. cuspidatus sample group are significantly different from each other (P < 0.05)