The formaldehyde problem related to the renovation of new houses is a headache for many people today. We don't know the indoor formaldehyde value below which we can move in, and we don't know how to detect the indoor formaldehyde concentration. Let's give you a detailed introduction.
First of all, according to two domestic standards: 1. According to GB/T 18883-2002 Indoor Air Quality Standard, the measured indoor formaldehyde concentration is lower than 0. 1mg/m3. 2. According to GB/T50325-2020 "Indoor Environmental Pollution Control Standard for Civil Building Engineering", the formaldehyde concentration of a class of civil buildings (residential buildings, hospitals, schools, old buildings, etc.). ) should be less than 0.07 mg per cubic meter; Class II civil buildings (offices, libraries, shopping malls, transportation transfer stations, etc.). ), the formaldehyde concentration should be less than 0.08 mg per cubic meter. If the indoor formaldehyde value is lower than the corresponding standard value, we can check in safely, but once the indoor formaldehyde detection value is higher than the corresponding standard value, we need to find a professional formaldehyde treatment company to treat formaldehyde for us.
How to detect indoor formaldehyde?
If it is a rough detection of indoor formaldehyde concentration, you can choose to buy a home formaldehyde detector for testing. If we want to accurately detect the indoor formaldehyde concentration, we should either choose an ordinary testing company or an authoritative testing institution with CMA qualification. In addition to the difference in testing costs, the most important thing is that the testing institutions with CMA testing qualifications detect more accurate values and bear all the consequences for the testing report. In addition, AHMT spectrophotometry, phenol reagent spectrophotometry, gas chromatography, acetylacetone spectrophotometry and other methods can also be selected to detect indoor formaldehyde concentration, which are more accurate methods, among which phenol reagent spectrophotometry is the most used method.
How much do you charge for formaldehyde testing?
Under normal circumstances, ordinary formaldehyde detection companies generally charge100-one point in 300 yuan, and laboratories with CMA qualifications generally charge 300-one point in 500 yuan. Houses with different areas will set up different formaldehyde detection points. General housing area less than 50 square meters, need 1 ~ 3 formaldehyde sampling points; If the building area is 50 ~ 100 square meter, 3 ~ 5 formaldehyde sampling points are needed; If the building area is greater than 100 square meter, there will be at least five formaldehyde detection points, then we can estimate the building detection fee by combining the building area and the fee of one point.
The above is how to detect whether formaldehyde exceeds the standard, hoping to help some people.