INDOOR AIR ORGANIC POLLUTION IN A PART OF THE CITIES IN CHINA

摘要

Indoor air pollutants monitoring were carried out in Beijing, Tianjin, Shanghai, Chongqing, Changchun, Dalian,Shizuishan, Gansu and Zhuhai. 3276 formaldehyde samples and 982 TVOC samples were collected in household.4-Amino-3-hydrazino-5-mercapto-1,2,4-triazole(AHMT) spectrophotometry is used to measure the concentration of formaldehyde in indoor air. The concentration of formaldehyde are 0.05-4 mg/m3. The concentrations of formaldehyde in indoor increased with the temperature and humidity. Tenax TA adsorption/thermal desorption/capillary gas chromatography is used to measure the concentration of TVOC in indoor air. The results showed that n-heptane/C7, benzene, toluene, n-octane/C8, butyl acetate, m,p-xylene, o-xylene, terpene, benzaldehye, octanal,propylbenzene, 1,4-dichlorobenzene, camphor, iso-octanol, acetophenone, nonanal, naphthalene, decanal,n-tridecane/C13, methyl- naphthalene, n-tetradecane/Cl4, n-pentadecane/Cl5 frequently occured in indoor air.The concentration of those compounds are as follow: n-heptane/C7 are 0.0002-6.1 mg/m3, benzene are 0.0002-4.3mg/m3, toluene are 0.00003-9.1 mg/m3, n-octane/C8 are 0.0003-3.1 mg/m3, butyl acetate are 0.00001-6.3 mg/m3,m,p-xylene are 0.00002-8.2 mg/m3, o-xylene are 0.00005-2.2 mg/m3, terpene are 0.000003-1.0 mg/m3,benzaldehye are 0.0001-4.1 mg/m3, octanal are 0.00002-9.2 mg/m3, propylbenzend are 0.00002-0.5 mg/m3,1,4-dichlorobenzene are 0.00009-6.8 mg/m3, camphor are 0.0002-3.5 mg/m3, iso-octanol are 0.00002-1.7 mg/m3,acetophenone are 0.0002-1.5 mg/m3, nonanal are 0.00008-8.1 mg/m3, naphthalene are 0.00006-1.4 mg/m3, decanal are 0-2.3 mg/m3, n-tridecane/Cl3 are 0.00005-1.4 mg/m3, methyl- naphthalene are 0.0001-0.4 mg/m3,n-tetradecane/C14 are 0.0001-1.2 mg/m3, n-pentadecane/Cl5 are 0.00009-1.0 mg/m3, TVOC are 0.005-394.4 mg/m3.