China's current indoor formaldehyde detection should be noted that the main points and methods are as follows:

      1.Test should be arranged in decorative, 7 days after completion of the renovation started. Many consumers believe that the just completed renovation detected immediately is the best time, in fact, paints and coatings maintenance period is usually seven days, seven days or less is volatile when the highest concentrations of various pollutants, seven days after the concentration can be reduced to a steady state, then the optimum phase is detected.

      2.The concentration of indoor air pollutants and external doors and windows off time is closely related to the longer of external doors and windows closed, the higher the concentration of indoor pollutants. Detection of chlorine in the external doors and windows should be closed for up to 24 hours later; the other four pollutants are specified in sufficient ventilation, the external doors and windows closed after one hour after. This is considered a pollutant accumulation process and the body's normal working life of the actual requirements. In addition, the construction of a centralized air conditioning should be in the case of normal operation, sampling testing.

      3.National standards for pollutant concentration limits (dechlorination outside) are blank after deducting outdoor air limit values ??, meaning that the need to measure indoor and outdoor pollutant concentration levels of pollutants, two-phase reduction is due to indoor decorative building materials caused by contaminants. Because outdoor air pollution is not architectural units to control , especially in a building while there are a few families together in the renovated building of the small surrounding ambient air pollution will reach a certain level, measuring outdoor air pollutant concentrations in judging the quality of indoor more is very important.

      4.At this stage, the national standards in addition to allowing chlorine, formaldehyde can now adopt portable equipment for testing, other ammonia, benzene, total volatile organic material 3 is to provide on-site after sampling in the laboratory measurements.

      5.Consumers value the home environment is a good thing, but it needs sensible consumer, after all, air quality testing fee for individuals is an extra burden. Consumers should know what is the purpose detector? Is used as evidence to resolve disputes , we must find a quality assurance testing unit , the room can not have any purchased furniture, to strictly enforce the above -mentioned detection external conditions ; if you just want to know their living conditions , to analyze all home decoration materials and types of pollutants that may arise from the nuclear industry, Beijing Institute of Geology for the long-term test results seems excessive in the Beijing area is more serious formaldehyde , benzene, TVOC , consumers can have a choice of selecting Some test items, no need to pursue "all testing”.