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Values of target variables in the factorial experimental designs performed with the FPSE media evaluated.
| Run Order | Sample Volume | Extraction Time | Elution Time | Extractant Volume |
|---|---|---|---|---|
| 1 | + | + | − | + |
| 2 | + | + | + | + |
| 3 | − | − | + | + |
| 4 | − | + | + | − |
| 5 | − | + | − | + |
| 6 | − | − | − | − |
| 7 | + | + | + | − |
| 8 | + | + | − | − |
| 9 | + | − | + | + |
| 10 | + | − | − | − |
| 11 | + | − | + | − |
| 12 | − | − | − | + |
| 13 | − | + | − | − |
| 14 | − | − | + | − |
| 15 | − | + | + | + |
| 16 | + | − | − | + |
