- An acid dye colorimetry method was developed for the determination of cyclovirobuxine D and its tablets .
- Methods The total alkaloids were tested at 420 nm with acid dye colorimetry in which atropine sulfate was used as standard reference.
- Keywords Huanglian Berberine Acid dye colorimetry;
- METHODS Acidic dye colorimetry with bromothymol blue as ion pair reagent was employed to determine the alkaloids in samples.
- Keywords acid dye colorimetry;Tendrilleaf fritillary Bulb;peimine;