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Anonymous users2024-02-11Formaldehyde detection has no requirements for drying time, as long as the house is decorated and all the furniture is in the house, it can be tested.
For renovated families who are ready to move in or have moved in, according to the "Indoor Air Quality Standard" GB T18883-2002, the door and window closure time during the detection and sampling: 12 hours (that is, the window closing time when people sleep at night is more than 12 hours, and it will not exceed 20 hours), so the test results of the doors and windows closed for 12 20 hours when air sampling is carried out will be closer to the truth.
Formaldehyde detection is a representative substance of indoor air pollution, in fact, the "Indoor Air Quality Standard" GB T18883-2002 standard, it is recommended that indoor air be tested for six items: formaldehyde, benzene, toluene, xylene, ammonia, TVOC (total volatile organic compounds).
1.Total volatile organic compounds (VOCs) include: benzene, toluene, paraxylene, m-xylene, o-xylene, styrene, ethylbenzene, butyl acetate, undecane, a total of nine substances; The concentration of total volatile organic compounds (VOCs) in the CMA test report is the sum of the concentrations of the above nine substances.
2.Air conditioners and ventilation fans are not allowed to be turned on during the closure process and testing process (**Except for special requirements of air conditioners and customers, but must be recorded).
3.Do not engage in activities that affect the test results, such as smoking and using gas stoves, during the closure process and during the test.
4.The testing site needs to be cleaned up, and residual paints, paints, plates, etc. cannot be stacked.
5.Do not use chemical products such as air fresheners, perfumes, etc. during the closure process and testing process.
6.During the inspection process, the doors of each room should be closed to each other as much as possible, and no ventilation should be maintained.
7.It is best that the total number of testing personnel and other personnel during the testing process should not exceed 3, so as to minimize the impact of personnel activities on testing.
8.Time-consuming time for door-to-door air pollution testing: Sampling at each testing site takes about 15-20 minutes.
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Anonymous users2024-02-10It can be tested in about 3 months.
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Anonymous users2024-02-09When using an electrochemical formaldehyde detector, turn on the instrument outdoors, let it stand for about 10 minutes (see the instrument description for details), and then take it indoors, it is recommended to put it away from the pollution source, such as a glass table, and wait for 10 minutes before reading. It is best to measure it several times (such as taking it out for 10 minutes and then emptying it in), and finally take the average value, which is the indoor air condition. If the outdoor value is not zero, the indoor value minus the outdoor value is the effective value (some instruments can be manually set to zero).
Knowledge expansion: Generally, to measure the formaldehyde in the home, you should close the doors and windows in advance (12 hours and 1 hour before lifting the socks), and then measure, and pay attention to the difference in the measured values in the two cases. It is normal for the measured values to vary depending on the temperature and humidity.
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Anonymous users2024-02-0812 hours. People spend about 90 of their time indoors, especially in winter and summer. With the doors and windows closed and the air conditioning on, the time spent indoors is well over 12 hours a day.
If indoor formaldehyde is detected according to the "1 hour" standard, it is not only inconsistent with the daily life state, but also difficult to detect polluting substances in such a short time. <
Formaldehyde needs to be sealed for 12 hours.
People spend about 90 of their time indoors, especially in winter and summer. With the doors and windows closed and the air conditioning on, the time spent indoors is well over 12 hours a day. If indoor formaldehyde is detected according to the "1 hour" standard, it is not only inconsistent with the daily life state, but also difficult to detect polluting substances in such a short time.
This problem is difficult, which is related to the degree of decoration of the home, the decoration materials and the location of the house. Our customers have ventilation for more than one year and the test will exceed the standard, and there are also ventilation for one month and the test will not exceed the standard, so it cannot be generalized.
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