Taiwan hospital keep monitoring sodium hypochlorite to improve the disinfection effect for COVID-19
Seeing the hospital using a wrong ratio to dilute sodium hypochlorite for doing an ineffective disinfection job every day, Angelo Wan and his team solve this problem by creating a digital meter, MIZU Bleach Meter, for measuring the concentration of diluted bleach. To assure the final concentration shall be expected value for effective disinfection of cleaning, and not only rely on the mixing ratio of water. Angelo said if you are not sure the original bleach concentration, how do you know you got the right concentration by using specify the ratio of water to dilute? For the time being, COVID-19 is a major topic around the world. This product, MIZU Bleach Meter, a qualify epidemic prevention product having a US patent, has been proper use in Taiwan's hospital for a while. It lets the cleaning staff made a good job to prevent nosocomial infection. Do problems always hide in the regular daily job, do other countries in the world have the same question and concern? Always measure by bleach meter after finish dilution every time to assure disinfection is effective is necessary? Public health for disease control and prevention uses chlorine bleach (Sodium Hypochlorite, NaClO) to do disinfection and sterilization. Bleach level has been specified to dilute to a concentration typical of 500, or 1000ppm by government CDC such as hospital, long term care center, nursing home, healthcare facilities, healthcare infection control area, dialysis center, kindergarten school, and primary school. Many countries' CDC guidelines assumed the concentration of bleach is 5.25-6.15% in the market. Introduce people to prepare a 500ppm solution is 1:100, and 1000ppm solution is 1:50 diluted by tap water. Most of the above facilities have a bucket which marked 10 liters and 20 liters. Also, a measuring glass for the cleaner to prepare the bleach solution. Actually, no one knows how much concentration of bleach buys from the market whenever delivery to end-user. It could be 6%-2.2%. Below 5% is usual. (This data is evaluated by one of the credible magazines which investigated 29 different kinds of bleach in the Hong Kong market.) Concentrated Bleach Sodium Hypochlorite is not fixed. One bottle of concentrated chlorine bleach will lose effectiveness after 30 days. The stored solution will have a 50% decrease in concentration after 30 days of storage. (Ref. Virginia Department of Health, Fall 2011, Environmental FAQs: Page 5 of 5) Depends on the proportional dilutions has no guarantee the disease control and prevention is effective. MIZU bleach meter can provide reliable data (ppm) easily when the cleaner doing dilution job, and identify effective disinfection and sterilization.
