Evaluation of the Influence of Sulfur-Fumigated Paeoniae Radix Alba on the Quality of Si Wu Tang by Chromatographic and Chemometric Analysis

Figure 4

Column histogram statistics of content comparison () (a), PC 1-PC 2-PC 3 score plot of PCA for twenty batches of SWT (b), and PC 1-PC 2-PC 4 score plot of PCA for twenty batches of SWT (c) (1–10, SFP SWT; 11–20, SDP SWT).

(a)

(b)

(c)