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Vol. 25 No. 5 (2013): Vol 25 Issue 5

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Experimental Method for Estimating Henry’s Law Constant of Volatile Organic Compound

https://doi.org/10.14233/ajchem.2013.13584
W. Zhang
State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, P.R. China
L. Huang
State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, P.R. China
C. Yang
State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, P.R. China
W. Ying
State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai, P.R. China

Corresponding Author(s) : W. Ying

wcying@yahoo.com

Asian Journal of Chemistry, Vol. 25 No. 5 (2013): Vol 25 Issue 5

Abstract

A simple experimental method for estimating the Henry’s law constant of a volatile organic compound in water is presented. Based on the Henry’s law constant definition, measuring the equilibrium liquid phase concentration of a closed system partially filled with the volatile organic compound solution provides the necessary data for calculating its Henry’s law constant of the test conditions. The experimental Henry’s law constants of methyl-tert-butyl ether, benzene, toluene, ethyl benzene, xylene were reproducible; the experimental Henry’s law constants of those volatile organic compounds, nitrobenzene and trichloroethylene were in general agreements with corresponding estimates of the empirical methods of ratio of vapour pressure to water solubility, the Yaws method and the HENRYWIN program methods as well as the literature data. The Henry’s law constants of several volatile organic compounds confirmed the expected effects of temperature and non volatile solvent methanol. The method of this study can be employed to estimate the Henry’s law constant of a volatile organic compound at a specific temperature and sample composition.

Keywords

Water solubility Vapour pressure Volatile organic compound Methyl-tert-butyl ether Henry’s law constant
Zhang, W., Huang, L., Yang, C., & Ying, W. (2012). Experimental Method for Estimating Henry’s Law Constant of Volatile Organic Compound. Asian Journal of Chemistry, 25(5), 2647–2650. https://doi.org/10.14233/ajchem.2013.13584
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