Determination of the main phenolic in Clerodendranthus spicatus from different areas by colorimetric method / 国际药学研究杂志

ABSTRACT

Objective To choose an appropriate coloured system and develop a method for the determination of the main phenolic in Dai Medicine -Clerodendranthus spicatus from different areas. Methods The main phenolic in Clerodendranthus spicatus from 19 areas was determined at 500 nm wavelength, with rosmarinic acid as reference and sodium nitrite-aluminum nitrate -sodium hydroxide as colour-developing system. Results Rosmarinic acid presented good linear relationship (r2 =0.9993) in the concentration range of 8.792-17.584 μg/ml.The average recovery was 100.73% and RSD was 0.85%.The content of the main phenolic in Clerodendranthus spicatus ranged from 1.16 % to 3.49 %. Conclusion The method is appropriate for the determination of the main phenolic in Clerodendranthus spicatus. The main phenolic content in samples from Yunnan province is relatively high.