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Huperzine - A Examination
Aug 29, 2018

The clarity of an acidic solution

After taking 5mg of this product and adding 5ml of 0.1mol/L hydrochloric acid solution for dissolution, the solution should be clarified.

About the material

This product was dissolved with 0.01mol/L hydrochloric acid solution and made into a solution containing 0.1mg in each 1ml, which was used as the test solution. An appropriate amount of precision was taken, and 0.01mol/L hydrochloric acid solution was quantitatively diluted to produce a solution containing 2.5 weeks g in every 1ml, which was used as the control solution. According to content determination under the chromatographic conditions, take 20 mu l reference solution into the liquid chromatograph, adjust the detection sensitivity, the chromatographic peak of main component of the peak height is approximately 10% of full scale, and precision measuring each 20 mu l solution and reference solution, injection liquid chromatograph respectively, record chromatograph chart to 2 times of retention time of chromatographic peak of main component. If there are impurity peaks in the chromatogram of the sample solution, the peak area of each impurity shall not be greater than the main peak area of the control solution (2.5%).

Dry weight loss

This product is about 0.3 g, in 80 ℃ decompression drying to constant weight, reduce weight loss may not be over 4.0%