Research Article

Optimization of Ultrasound-Assisted Extraction of Total Flavonoids from Dendranthema indicum var. aromaticum by Response Surface Methodology

Figure 3

Diagnostic plots of the quadratic model. (a) Diagnosis of experimental and predicted values of TF extraction rate. (b) Plot of internally studentized residuals for TF extraction rate. (c) Normal probability plot for TF extraction rate.
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