Sampling method of swab surface

Surface Microbial Test The Surface Microbial Test can determine the degree of microbial contamination on the surface of objects (including work clothes). In general, three methods can be used for indirect sampling with cotton swabs, direct contact sampling and surface flushing. When using the direct contact method, the contact dish used should be placed at room temperature before use. .1 Cotton swab surface sampling method The sampling area of ​​the cotton swab surface sampling method is generally 25cm2, and the surface wiping should at least include hands, wrists and legs. Cotton swab indirect sampling is suitable for irregular surfaces. When sampling, hold the handle of the swab and contact the sampling surface at an angle of 30°, and use S-type or Z-type to slowly and rotate the cotton swab to fully wipe. If the swab head is made of calcium alginate material, dilute hydrochloric acid solution (such as sodium citrate solution with a mass fraction of 1%) should be used as a diluent, so that the swab head can be completely dissolved.


Prohibited plastic products for sale. The production and sale of polyethylene agricultural mulch films with a thickness of less than 025 mm and a thickness of less than 01 mm are prohibited throughout the province. The manufacture of plastic products from medical waste is prohibited. A complete ban on the import of waste plastics. By the end of 2020, the production and sale of disposable foam plastic disposable plastic cotton swabs will be prohibited; the production of daily chemical products containing plastic microbeads will be prohibited. By the end of 2022, the sale of daily chemical products containing plastic microbeads will be banned.



The care of the umbilical cord does not actually require any protective stickers, but every day, the root should be disinfected with iodophor, and then it must be pressed and dried with a dry cotton swab. The umbilical cord usually falls off on its own within about 10 days after birth, although some babies take longer.


There are also many paternity test samples that can be used for children, such as hair with follicles (recommended for children over 5 years old), toothbrushes, etc. Among them, the most recommended blood samples are commonly used samples. Blood samples have high DNA data content and strong stability. It is easy to store and has a strong durability. Just use a blood collection needle to drop 2-3 drops of blood from the fingertips of the child on medical gauze or tissue paper to dry in the shade. In addition, there are bloodstains on the hemostatic cotton swabs that the child gave injections or went to the hospital for examination. You can also try a paternity test.


Don't rub your ears, don't dig your ears with cotton swabs, because earwax actually works! It prevents dust and bacteria from entering your eardrums, and removing the earwax removes the protection from the eardrums.