Ten things to pay attention to when buying hollow capsules?

Update:24 Feb 2021

1) Tightness:
Take 10 capsules of this product, gently pinch both ends of the capsule with your thumb and index finger, rotate and pull it apart without sticking, deforming or breaking, then fill it with talcum powder, cover the bottle cap and body, and drop the capsules one by one. On a 2cm thick and 1m high wooden board, there is no leakage of powder. If there is a small amount of powder leakage, not more than 2 tablets. If it exceeds 10 times, you should take another 10 retests and follow the regulations.

2) Fragility:
Take 50 pieces of this product, put them in the glasses, move them to a dryer filled with saturated magnesium nitrate solution, keep them at 25°C and 1°C for 24 hours, and immediately put them on a wooden board (thickness Put a cylindrical weight (made of polytetrafluoroethylene, diameter 22mm, weight 20g±0.1g) into the glass tube of 2cm) freely from the mouth of the glass tube. According to whether the capsule is broken, if there is a break, no more than 15 pieces. 

3) Time limit for disintegration:
Take 6 tablets of the product, fill them with talc, and check the capsule according to the disintegration time limit check method and method. Each tablet should be completely dissolved or disintegrated within 10 minutes. If one tablet cannot be completely dissolved or disintegrated, another 6 tablets should be taken for review, and the review should meet the requirements. 

4) Sulfite (SO<[2]> calculation):
Instead of 5.0 grams of product, it is dissolved in a long-necked round-bottom flask with 100 ml of water by heating, adding 2 ml of phosphoric acid and 0.5 g of sodium bicarbonate, immediately connecting the condenser tube, and taking 15 ml of 0.1 mol/L iodine solution as Receive the solution, collect the 50 ml fraction, add 100 ml of water, shake well, measure 50 ml, put it in a water bath to evaporate, add the right amount of water at all times and evaporate until the solution is almost colorless.

5) Chloroethanol:
Take an appropriate amount of chloroethanol, accurately weigh, add n-hexane to dissolve, quantitatively dilute to a solution of about 22°g per ml; accurately measure 2ml, place it in a separation funnel containing 24ml n-hexane, add 2ml purified water, and shake well For extraction, the aqueous solution was used as the control solution. Another appropriate amount of capsules, cut into pieces, weighing 2.5g, placed in an Erlenmeyer flask stopper, add 25ml of n-hexane, soak overnight, the n-hexane solution is transferred to the separatory funnel, 2ml of water It was added, and the solution was to extract the shaking, aqueous solution as an example solution.

6) Check through gas chromatography:
Use 15% polyethylene glycol-1500 (or 10% polyethylene glycol-20 meters) column length of 2 meters and measure a column temperature of 110°C. The peak area or height of the chloroethanol in the test solution shall not exceed the peak area or height of the control solution (applicable to the ethylene oxide sterilization process). 

7) Drying loss:
Take 1.0g of this product, separate the cap from the bottle, and dry at 105°C for 6 hours. The weight loss range is 12.5% ​​~ 17.5%.

8) Residue on ignition:
Take 1.0 gram of product and inspect according to law. The remaining residue (transparent) must not exceed 2.0%, 3.0% in one part (translucent or transparent and opaque part), 4.0% (in one part translucent and opaque other part) and 5.0% (other opaque part) ). 

9) Heavy metals:
The content of heavy metals must not exceed 50 ppm. 

10) Viscosity:
Take 4.50g of this product, place it in a 100ml beaker, fix the weight, add 20ml of warm water, and place it in a 60℃ water bath with stirring to dissolve. Take out the beaker, dry the outer wall, add water to make the total weight of the glue reach the weight of the following calculation formula (including 15.0% dry product). Stir the glue evenly and pour it into a dry Erlenmeyer flask with a stopper. Tighten the stopper and place it in a water bath at 40°C and 0.1°C. After about 10 minutes, put it into a flat viscometer.


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