Table 7.
Two control factors (HPLC instrument and column) and their three level settings.
| Levels | Factor-1 (HPLC Instruments) | Factor-2 (Chromatographic Columns) |
|---|---|---|
| Level-1 | Agilent-UVD | Agilent |
| Level-2 | Agilent-DAD | Waters |
| Level-3 | Waters-E2695 | Venusil |
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