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Studied levels of parameters involved in central composite design for optimizing the most important factors.
| Level | |||
|---|---|---|---|
| Variable factors | |||
| Lower limit (−1) | Mean (0) | Upper limit (+1) | |
| A: DGF (L/min) | 2 | 6 | 10 |
| B: SLF (µL/min) | 10 | 15 | 20 |
| C: DGT (°C) | 100 | 150 | 200 |
