Table 2.
Linear relationship of standard curve.
| Injection volume (ng) | 18.8 | 37.6 | 75.3 | 112.9 | 150.6 | 188.2 |
| Peak area | 67.2 | 134.0 | 278.0 | 422.3 | 565.1 | 709.2 |
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