Research on Optimal Test Condition for Determining TVOC in Air
- VernacularTitle:空气中总挥发性有机化合物测定条件探讨
- Author:
Huifang YU
;
Xinyi LI
;
Jing TAO
- Publication Type:Journal Article
- Keywords:
Chromatography, gas;
Volatile organic compounds;
Sampling tube heating time;
Pyrolysis time
- From:
Journal of Environment and Health
1992;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To research the optimal test condition for determining TVOC in air based on GB 50325-2001 Code for Indoor Environmental Pollution Control of Civil Building Engineering. Methods Seven kinds of standard gas (benzene, toluene, ethylbenzene, p-dimethylbenzene, m-dimethylbenzene, ethenylbenzene and o-dimethylbenzene) were injected into Tenax-TA sampling tube, then heated for different time and pyrolyzed for different time. Results Tenax-TA sampling tube was heated for 30 seconds and pyrolyzed for 90 seconds. The recovery rate of seven kinds of compounds was more than 90%. Relative standard deviation was less than 10%. Conclusion The optimal test condition for determining TVOC in air has been presented in this paper. The precision and sample recovery rate will meet the requirement of indoor air quality standard annex A Indoor Air Monitoring Technology.
