Current location - Recipe Complete Network - Dinner recipes - Identification of gelatin hollow capsules
Identification of gelatin hollow capsules
(1) Take 0.25g of this product, add 50ml of water, heat and dissolve it, let it cool, shake it evenly, take 5ml of solution, and add a few drops of potassium chromate test solution-dilute hydrochloric acid (4: 1) to produce orange flocculent precipitate.

(2) Take 1 ml of the solution to be identified (1), add 50 ml of water, shake well, and add a few drops of tannic acid test solution to produce turbidity.

(3) Take about 0.3g of this product, put it in a test tube, and add a little sodium calcium. The generated gas can turn the wet red litmus paper blue.