Research Article
Online Microextraction Coupled with HPLC-ABTS for Rapid Analysis of Antioxidants from the Root of Polygonum bistorta
Figure 3
HPLC-chromatograms (positive peaks for components, negative peaks for antioxidants) of mixed standards (a) and PB (b). Unknown (1), gallic acid (2), neochlorogenic acid (3), caffeic acid (4), chlorogenic acid (5), procyanidin B2 (6), catechin (7), quercetin-8-C-glucoside (8), quercetin-4′-O-glucoside (9), rutin (10), and quercetin-3-O-glucuronide (11).
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