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How To Identify The Hollow Gelatin Capsules
Nov 14, 2016

(1) this product 0.25G, 50ml with water, heat to dissolve, cold, shake, take the solution 5ml, add potassium chromate solution-dilute hydrochloric acid (4:1) a few drops, which produces Orange Flocculent precipitates.

(2) the identification (1) under solution 1ml, 50ml with water, shake, and tannic acid solution a few drops, which produce pollution.

(3) this product is about 0.3G, reset in a test tube, add soda lime, the resulting gases can cause moist red litmus blue.

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