Study on quality of Diospyros kaki leaves based on chemical fingerprint and multi index determination / 中草药

ABSTRACT

Objective: To establish the HPLC fingerprint and to determine multiple components of leaves of Diospyros kaki, in order to provide a scientific basis for quality control for the D. kaki leaves and related products. Methods: The chromatographic separate was achieved on a Diamonsil C18 (250 mm × 4.6 mm, 5 μm) column with acetonitrile and 0.2% formic acid in water as the mobile phase for gradient elution; Volume flow rate was 1.0 mL/min; Column temperature was 35 oC; Detection wavelength was 360 nm; And injection was 10 μL; On 22 batches of persimmon leaf medicinal materials of fingerprint study, was evaluated with a chromatographic fingerprint similarity evaluation system (version 2004A), the 22 batches of persimmon leaf are divided into two categories by system cluster analysis and PCA analysis. And the determination method of hyperoside, isoquercitrin, quercetin, and kaempferol was also investigated at the same time. Results: The fingerprint of D. kaki leaves was established. There were 12 common peaks in the fingerprint of D. kaki leaves. Hyperoside, isoquercitrin, quercetin and kaempferol were baseline seperated with good linearity relationships between concentration and peak areas over the linear ranges, within 0.044-0.880, 0.078-1.560, 0.040-0.800 and 0.035-0.700 μg(r > 0.999 8). The average recoverys of the investigated compounds were 97.59%, 98.97%, 100.55%, 99.96%. Conclusion: HPLC fingerprint binding index component determination can provide a reference for the quality of D. kaki leaves and related products control.