Quality standard study of Li folk medicine callicarpa nudiflora powder.

Objective: To establish the quality standard of Li folk medicine callicarpa nudiflora powder by modern analytical method. Methods: TLC was used to identify the powder. Five heavy metals and harmful elements(Pb, Cd, As, Hg and Cu) in the powder were determined by flame atomic absorption spectrometry and hydride atomic fluorescence spectrometry. The content of luteolin and Mullein glycoside in the powder was determined by HPLC. Results: the fluorescent spots of TLC identification of powder were clear, and the separation of the two main components was good. It has good specificity, reproducibility and durability, which can be used for the identification of the powder.The inspection items of heavy metals for the identification of powder were established. It was stipulated that: according to the determination method, the lead should not exceed 5 mg/kg; the cadmium should not exceed 0.3 mg/kg; the arsenic should not exceed 2 mg/kg; the mercury should not exceed 0.2 mg/kg; the copper should not exceed 20 mg/kg.The content of luteolin and Mullein glycoside in the powder were determined by HPLC and the content inspection item of the powder was established. It was stipulated that the content of luteolin and Mullein glycoside in the powder should not be less than 0.48% and 5.83%, which can be used for the content limit inspection of the powder. Conclusion: the quality standard method established by our institute is advanced and operable, and can be used for the quality control of the powder. [ABSTRACT FROM AUTHOR]