Table 1 Selection of level for BBD design
Independent variable | Level | ||
|---|---|---|---|
+ 1 | 0 | − 1 | |
% Organic modifier (ml) | 65 | 60 | 55 |
pH | 5.0 | 4.5 | 4.0 |
Flow rate (ml/min) | 1.2 | 1 | 0.8 |
Independent variable | Level | ||
|---|---|---|---|
+ 1 | 0 | − 1 | |
% Organic modifier (ml) | 65 | 60 | 55 |
pH | 5.0 | 4.5 | 4.0 |
Flow rate (ml/min) | 1.2 | 1 | 0.8 |