Research Article
Structural and Quantitative Analysis of Three C-Glycosylflavones by Variable Temperature Proton Quantitative Nuclear Magnetic Resonance
Table 1
Linearity, range, and precision of schaftoside calculated by VT-1H-qNMR (348 K).
| Linearity and range | Precision | Repeatability | Sample | (mg/mL) | (mg/mL) | | Sample | (mg/mL) | (mg/mL) | (%) | No. | (%) |
| 1 | 5.48 | 5.01 | 0.0759 | 1 | 4.64 | 19.46 | 93.51 | 1 | 94.42 | 2 | 5.44 | 10.40 | 0.1334 | 2 | 5.17 | 20.00 | 94.17 | 2 | 93.91 | 3 | 4.78 | 14.82 | 0.2201 | 3 | 5.34 | 20.11 | 93.89 | 3 | 94.15 | 4 | 5.84 | 18.98 | 0.2296 | 4 | 4.74 | 19.97 | 93.07 | 4 | 93.58 | 5 | 5.28 | 30.09 | 0.4015 | 5 | 4.73 | 19.98 | 94.16 | 5 | 93.99 | | | | | 6 | 5.84 | 18.98 | 94.42 | | | | 0.998 | | — | | — | RSD (%) | — | | 0.53 | | 0.33 |
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