Medical degreasing gauze is a kind of medical absorbent gauze, which is made of cotton sunflower mature hairy velvet, after removing impurities, degreasing, bleaching and processing. Medical absorbent gauze is mainly used for clinical dressing in hospital. At the same time, it can be made into cotton cloth and cotton swab after further processing of degreasing cotton. Objective and experimental method of medical absorbent gauze

Medical absorbent gauze

1. Fluorescent substance: take some of this product, spread it into a certain thickness, and inspect it under ultraviolet light (365nm). Only brown purple fluorescence and most yellow particles are allowed. Except for most separated fibers, strong blue fluorescence is not allowed.

2. Acidity and alkalinity: add 3 drops of phenolphthalein indicator solution in the water, and do not show pink white; take 100ml of the filtrate under the soluble substance in the water, add 2 drops of bromocresol violet indicator solution, and do not show yellow.

3. Soluble substance in ether: take 59, put it into 250 ml Soxhlet extractor, and continue to extract with 150 ml ether for 4 h. siphon reflux shall not be less than 4 times per hour. The extract solution shall be dried and dried to constant weight at 105 "C. the residue shall not exceed 0.5%.

4. Water absorption time: take 10 pieces of this product, each piece of LCM × locm, fold it into 5cm × 5cm, place it on the water surface suitable for glass container (the water temperature is 20 ± 2 ℃, the gauze should not touch the container), and should be absorbed in the LOS and sink below the liquid level.

5. Soluble substance in water: take 12.59 of this product, put it into a beaker, add 400ml of newly boiling hot water, heat and boil for 15min, transfer the water immersion solution into a 500ml measuring bottle, wash the gauze with the newly boiling hot water, put the washing liquid into the measuring bottle, cool down, add water to the scale, shake well, filter, finely measure 100ml of the filtrate, put it on the water bath pan, dry it to constant weight at 105 ℃, and the residue shall not exceed 0.5% 。