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Huperzine A differentiation
Sep 04, 2018

(1) take about 0.2mg of this product, add 5 drops of ethanol for dissolution, add 2 drops of bismuth potassium iodide test solution, that is, generate orange yellow precipitate. (2) in the chromatographic chart recorded under the content determination item, the retention time of the main peak of the sample solution was consistent with that of the control solution. (3) the infrared light absorption spectrum of this product should be consistent with the control spectrum .