Characterization and Quantification of Luteolin-Metal Complexes in Aqueous Extract of Lonicerae Japonicae Flos and Huangshan Wild Chrysanthemum

<div>Luteolin was allowed to react with anhydrous calcium chloride, anhydrous zinc chloride, magnesium chloride hexahydrate, iron chloride hexahydrate, or copper chloride dihydrate. After removal of free ion salts, the reactants were analyzed by <sup>1</sup>H-NMR spectroscopy. (a) Free luteolin was used as a control; (b) ethyl acetate solute.</div>

International Journal of Analytical Chemistry

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Figure 1

Figure 1: Characterization and Quantification of Luteolin-Metal Complexes in Aqueous Extract of Lonicerae Japonicae Flos and Huangshan Wild Chrysanthemum 

Figure 1 | Characterization and Quantification of Luteolin-Metal Complexes in Aqueous Extract of Lonicerae Japonicae Flos and Huangshan Wild Chrysanthemum 