【Knowledge science 1】Indoor decoration, will leave a series of formaldehyde, benzene, TVOC and a series of pollutants, and people generally stay indoors for more than 12 hours, constantly breathing formaldehyde and other polluting gases in the air, it is conceivable, how to know that indoor formaldehyde or benzene has exceeded the standard? In general, there are two kinds of national standards, 18883 and 50325, 18883 standards are according to the national standard for indoor sampling, issued by the health department and the National Environmental Protection Agency, not mandatory to do testing, only do recommended type, the standard is indoor closure for 12 hours, the use of phenol reagent spectrophotometry, take 10L formaldehyde concentration, and then react into different colors under the action of special color developer, so as to read out the data, suitable for indoor collection of formaldehyde concentration, 50325 is issued by the Ministry of Architecture, Is mandatory requirements to do testing, general detection of 7 items,: formaldehyde, benzene, toluene, xylene, TVOC, ammonia, radon, close the doors and windows for 1 hour, take the concentration of 10L in the building, respectively, with phenol reagent spectrophotometry and meteorological chromatography to obtain data, the collected data are in line with the national standard. Did you know?
