Medical absorbent cotton is used in cotton plant hairy Kwai mature, and then after removal of inclusion, degreasing, bleaching and processing of medical absorbent cotton. The medical skimmed cotton is mainly used as a clinical dressing for the hospital. In addition, a cotton swab can be made by further processing of the skimmed cotton. The main performance indexes and test methods of medical skimmed cotton are as follows:
1, fluorescent material: take this product number, split into a certain thickness, the UV lamp (365nm) view, only allow micro brown purple fluorescence and a few yellow particles, except for a few isolated fiber, should not show strong blue fluorescence.
2, pH: water soluble in solution under lOOmL, and drops 3 drops of phenolphthalein, not shown in pink, another water soluble filtrate under lOOmL, with bromocresol purple indicator solution 2 drops, not yellow.
3, Soluble ether: This product is 59, the 250mL of the Soxhlet extractor, continuous extraction with ether 4h 150mL per hour, siphonage of not less than 4, the extract was evaporated to dryness in 105, "C dried to constant weight, a legacy residue shall not exceed 0.5%.