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Citation: LI Jian-Quan, SHEN Cheng-Yin, WANG Hong-Mei, HAN Hai-Yan, ZHENG Pei-Chao, XU Guo-Hua JIANG Hai-He, CHU Yan-Nan, . Dynamic Measurements of Henry’s LawConstant of Aromatic Compounds Using Proton Transfer Reaction Mass Spectrometry[J]. Acta Physico-Chimica Sinica, ;2008, 24(04): 705-708. doi: 10.3866/PKU.WHXB20080428 shu

Dynamic Measurements of Henry’s LawConstant of Aromatic Compounds Using Proton Transfer Reaction Mass Spectrometry

1.
Laboratory of Environment Spectroscopy, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, P. R. China; Key Laboratory of Environmental Optics & Technology, Chinese Academy of Sciences, Hefei 230031, P. R. China

Corresponding author: ,
Received Date: 17 October 2007
Available Online: 7 January 2008

Henry’s lawconstants (HLC) of volatile aromatic compounds were determined using a dynamics approach by coupling a stripping cell directly to a homemade proton transfer reaction mass spectrometry (PTR-MS). The intensity of C6H6H+ ion dependence on liquid height of benzene solution was explored in order to ensure the equilibrium of aromatic compound components between the gas-bubbles and water. The HLC of benzene measured at 25 ℃ is in agreement with the reported value in literature, showing that this method is valid. HLC values were presented for benzene, toluene, ethylbenzene, chlorobenzene, 1,2-dichlorobenzene, 1,3-dichlorobenzene, 1,4-dichlorobenzene, 1,2-dimethylbenzene, 1,3-dimethylbenzene, 1,4-dimethylbenzene, and 1,2,4-trimethylbenzene. Compared to the conventional techniques, the dynamics extraction combination with PTR-MS is simple, fast, and less prone to artifacts in the HLC measurement.
- Henry’s law constant; Proton transfer reaction mass spectrometry; Chemical ionization; Volatile organic compounds; On-line monitoring
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