When we decorate the house, or place furniture, we should pay attention to the formaldehyde problem, because the materials used for home decoration and construction will inevitably use things containing formaldehyde. If the house inside the new furniture or newly painted more, it is possible that the formaldehyde exceeds the standard, the body will have an impact, we can formaldehyde content for testing. Test formaldehyde before the need to seal the room for a period of time, so how long to close the window is better?
First, the detection of formaldehyde to close the window for 12 hours or 24 hours
Generally speaking, close the window for 12 hours on it, 24 hours up is a bit long. Close the time is too long, then the measured data have a high probability of exceeding the standard, so it is not desirable. Indoor formaldehyde release is slow accumulation, the longer the closing time, the higher the content of formaldehyde in the air, the time is too long then the data detected will have no reference meaning, it is likely to fool consumers to do in addition to formaldehyde.
Second, off a few hours in the measurement of formaldehyde more accurate
Usually detect formaldehyde need to close the doors and windows for 12 hours. According to the national standard for indoor formaldehyde content GB/T18883-2002 and GB50325-2001, before the family and residential formaldehyde test, you need to close the doors and windows for 12 hours and open the cabinets and drawers. Do not leave any decoration materials left in the room. The temperature should be kept above 23°C. If you have air conditioning, turn it on. After 12 hours of closure, formaldehyde not exceeding 0.1 mg/m2 is considered to meet the standard. In addition, in the case of new, expanded and altered civil buildings with natural ventilation, inspection and sampling should be conducted 1 hour after closing the external doors and windows.
Third, how to determine the formaldehyde exceeds the standard
1. Every morning when I wake up, I will feel chest tightness, nausea and even dizziness.
2. There are often colds, allergies and other problems in the house, and children often cough, sneeze and have lowered immunity.
3. Although I don’t smoke, I often feel discomfort in my throat, foreign body feeling and bad breathing. Even feel sore throat and dryness of respiratory tract.
4. Newlyweds who have not been pregnant for a long time and cannot find out the cause of the disease; pregnant women who find fetal abnormalities under normal pregnancy conditions.
5. Indoor plants do not survive easily, and the leaves easily turn yellow and wither. Domestic pets die inexplicably.
6. There is a pungent, harsh and irritating odor indoors that does not disappear for a long time.
