What company in Zhengzhou can test indoor air quality?

You can find a third-party testing organization with CMA testing qualification for testing.

Before testing, the testing personnel should first seal the whole house, close the doors and windows, and minimize the flow of indoor air and outdoor air to ensure that the air to be tested is the actual air in the house. The whole sealing shall last for 12 hours. /kloc-after 0/2 hours, the inspectors need to collect air samples from the closed room first. The inspectors brought the special instrument "air sampler" into a closed room, fixed it in the room to be sampled with a triangular bracket, and started the machine to screen and sample air particles. Each sampling lasts for 20 to 30 minutes, and 3 to 5 air samples are collected from each room as needed. After the air sampling is completed, the staff will take it back to the laboratory for air testing. The detection items mainly include five indicators, namely formaldehyde, benzene series, TVOC (abbreviation of total volatile organic compounds), ammonia and radon content detection.

For air testing, please consult Dehe testing.