[Determination of berberine in Phellodendron chinense Schneid and its processed products by TLC (thin layer chromatography) densitometry].


Berberine from crude and processed Phellodendron chinense was determined by UV TLC densitometry. The results indicate that the content of berberine in processed products is 11.8% to 98% less than that of the crude drug. The recovery of berberine is 98% +/- 1.7% and the Standard relative deviation is 1.7%. 


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