- Seen : 255 View
(1) take 0.5g of the product, add 50ml of water, heat to dissolve, take 5ml of the solution, accentuate potassium chromate test solution – dilute
Hydrochloric acid (4:1) mixture drops, that is, orange flocculent precipitation.
(2) Take 1ml of the remaining solution under identification (1), add 100ml of water, shake well, add a few drops of tannic acid test solution, that is, muddy
Turbidity.
(3) Take this product, add sodium lime, heating, that is, ammonia odor.
How to test our wholesale gelatin for capsules grade?
Jelly strength (gelatin for capsules use only)
Take two copies of this product 7.50g each, put them in a test bottle and add water to make the 6.67% glue solution was covered and placed for 1 to 4 hours. Then stirred and heated in a water bath at 65℃±2℃ for 15 minutes to dissolve the test product. Put the test product at room temperature for 15 minutes, horizontally put the test bottle in a constant temperature water bath of 10℃±0.1℃. Use the rubber to hold the stopper for 17 hours ±1 hour. Then quickly remove the test bottle, dry the outer wall, and place the test bottle to jelly strength test machine
on the test table to test and calculate. The average of the two results shows that the jelly strength should not have the difference between 10 bloom.
Viscosity
Take 4.5g of this product and put it in a weighed weight 100ml beaker, add 20ml warm water, put in a 60℃ water bath and dissolve by stirring. Take out the beaker, dry the outer wall, add water to make the total weight of the glue reach the weight of the following formula (including dry products 15.0%), after mixing the glue well, pour it into a dry conical bottle with a plug, close the plug, and place it in a water bath at 40℃±0.1℃. After the temperature reaches 40℃±0.1℃, move to pinghe viscometer, measure at 40℃±0.1℃ water bath according to the viscosity determination method .
Total weight of glue (g) =(1− Dry weight loss) 4.50╳100
PH
Take 1.0g of the product, add 100ml hot water, shake it thoroughly to dissolve it, cool it to 35℃, and measure it according to standard, pH value should be 4.0~7.2.
Transmittance
Take 2.0g of the product, add 50~60℃ water to dissolve and make a solution containing 6.67%, cool to 45℃, then illuminate purple external – visible spectrophotometry to determine transmittance at 450nm and 620nm, respectively should below 50% and 70%.
Electrical conductivity
Take 1.0g of the product and dissolve it in water not exceeding 60℃ to make a solution containing 1.0% as the test solution. Take another 100ml water as blank solution, and put the test solution and blank solution in a water bath of 30℃±1℃ for 1 hour.
After that, measure the electrode by conductivity meter, and use the platinum black electrode as the determination electrode. Rinseding the electrode with blank solution for 3 times, measure the conductivity of blank solution. The conductivity of the solution should not exceed 5.0μS/cm. Remove the electrode and rinse the electrode with the test solution for 3 times. After that, conductivity of the test solution should not exceed 0.5ms /cm.
Sulfites (SO 2)
Take 10.0g of this product and put it into a flask with long neck and round bottom, add 150ml water and leave it for 1 hour. Heating in a 60℃ water bath to dissolve, add 5ml phosphoric acid and 1g sodium bicarbonate to connect the condensing tube immediately (excessive foam is
generated, adding appropriate defoaming agent, such as silicone oil, etc.), add heating distillation, use 0.05mol/L iodine solution 15ml as the receiving solution, collect 50ml distillate, dilute it to 100ml with water, shake well, take 50ml, put it on water bath for evaporation.
Replenish the appropriate amount of water at any time, steam until the solution is almost colorless, dilute to 40ml with water, check by sulfate test. If turbidity appears, should no more dense (0.01%)compared to standard 7.5 mL potassium sulfate solution.
Saler Company Information
