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With the development of people’s life, indoor air pollution has been known as a killer to people’s life.This paper summarized the indoor air pollution research of interior of our country and overseas, the definition of indoor air quality, and the factors that influence the indoor air quality. It analyzed the source and the ham of the five main factors——formaldehyde, ammonia, benzene , TVOC and radon that influence the indoor air quality most, and introduced the experiment that including the sampling method, examine foundation, principle, analyzing method and procedure.Basing on the investigation of the house decoration in Taian , the total feature was found :(1)The balcony was sealed; (2)Large quantity man-made planking was used; (3)Building materials , decorated materials and paints of new pattern was used; (4)Heating through the floor was popular used.Basing on the test and analysis of twenty families’ indoor air pollutants: formaldehyde , ammonia , benzene , TVOC and radon , we find the formaldehyde is the main factor who influence the indoor air quality most.The changing trend of indoor formaldehyde concentration with a year is also investigated. The result is help for us to choose the appropriate time for house decoration, and to choose the safe time to move in the house.
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