Figure 2
From: Extraction of polyphenols and synthesis of new activated carbon from spent coffee grounds
Chromatogram of a standard mixture (80 µg/L) obtained by the cLC-DAD optimized method. (1) Gallic acid; (2) Dihydroxybenzoic acid; (3) Chlorogenic acid; (4) Caffeine; (5) Caffeic acid; (6) p-Coumaric acid; (7) Trans- Ferulic acid; (8) Rutin; (9) Naringin; (10) Resveratrol; (11) Quercetin; (12) Kaempferol.
