5Bai Z, Jia C, Zhu T, et al. Indoor air quality related standards in China [A]. Proceedings (IV) of indoor air 2002 [C]. USA: IndoorAir 2002, 2002.1012-1017.
6U. S. Public Health Service. Toxicological profile for ammonia[A]. Agency for toxic substances and disease registry [C]. USA,Atlanta: ATSDR, 1990.1-57.
7The finnish society of indoor air quality and climate.Requirements for building products: The emission classificafion of building materials [A]. Classification of indoor climate 2000[C]. Finland: Publication 5. Espoo, 2000.
8Tuomainen M, Pirinen J. TVOC, formaldehyde and ammonia levels in two new blocks of fiats [A]. Proceedings (I) of indoor air 2002 [C]. USA: Indoor Air 2002, 2002.244-248.