Resumen
This study investigated the phenolic compounds of 15 Chrysanthemum morifolium Ramat cv. ?Hangbaiju?, including 6 ?Duoju? and 9 ?Taiju?, using high performance liquid chromatography (HPLC). The antioxidant activities of these ?Hangbaiju? were estimated by DPPH, ABTS and FRAP assays. Results show that a total of 14 phenolic compounds were detected in these flowers, including 3 mono-caffeoylquinic acids, 3 di-caffeoylquinic acids, 1 phenolic acid and 7 flavonoids. ?Duoju? and ?Taiju? possess different concentrations of phenolic compounds, and ?Taiju? exhibits higher caffeoylquinic acids and stronger antioxidant activities than ?Duoju?. Caffeoylquinic acids show a strong correlation with the antioxidant activities of the samples. Principal component analysis (PCA) reveals an obvious separation between ?Duoju? and ?Taiju?, using phenolic compounds as variables. Apigenin-7-O-glucoside, 3,5-di-O-caffeoylquinic acid, luteolin and acacetin were found to be the key phenolic compounds to differentiate ?Duoju? from ?Taiju?.