Microwave-Assisted Simultaneous Extraction of Luteolin and Apigenin from Tree Peony Pod and Evaluation of Its Antioxidant Activity

Figure 4

Antioxidant activity and antioxidants contents of crude extracts obtained by ME, HRE, and MAE of tree peony pod. (a) DPPH scavenging activity of the crude extracts; (b) FRAP of the crude extracts; (c) reducing power of the crude extracts; (d) total phenolics, total flavonoids, luteolin, and apigenin contents of the crude extracts. The values represent means ± standard deviation. Values followed by the same letter in the same assay are not significantly different (, ). Note: means the value of IC₅₀ cannot been obtained.

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