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Table 2 Experimental plan and results (FAMEs release) from testing acid, NaOH addition, and NaOH excess additions

From: Combining phospholipases and a liquid lipase for one-step biodiesel production using crude oils

Pattern Variables Response
  X1 (acid) NaOH (eqv) Extra NaOH (ppm) FAMEs (%)
212 Phosphoric acid 1 10 84.3
132 Citric acid 2 10 67.8
222 Phosphoric acid 1.5 10 83.9
131 Citric acid 2 0 67.1
232 Phosphoric acid 2 10 84.7
211 Phosphoric acid 1 0 78.8
231 Phosphoric acid 2 0 77.6
112 Citric acid 1 10 67.0
121 Citric acid 1.5 0 77.3
221 Phosphoric acid 1.5 0 79.5
122 Citric acid 1.5 10 53.6
213 Phosphoric acid 1 20 91.1
113 Citric acid 1 20 51.3
111 Citric acid 1 0 43.5
133 Citric acid 2 20 71.1
123 Citric acid 1.5 20 82.2
223 Phosphoric acid 1.5 20 85.6
233 Phosphoric acid 2 20 79.5