Simultaneous Analysis of Ursolic Acid and Oleanolic Acid in Guava Leaves Using QuEChERS-Based Extraction Followed by High-Performance Liquid Chromatography

Figure 3

HPLC chromatograms of standard solutions of UA and OA (a), a blank guava leaf sample (b), and a guava leaf sample after QuEChERS-based extraction (c). The embedded graphs are the magnified view of the chromatograms. Peaks in the chromatogram: (1) OA, (2) UA.

(a)

(b)

(c)