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Issue 22, 2017
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Mathematical equations combined with the MHE-GC method to study desorption kinetics of contaminants from food-package paper to air

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Abstract

In this study, a technique based on multiple headspace extraction gas chromatography (MHE-GC) was applied to determine the transfer kinetics of contaminants from paper-based packaging materials to air because of its sensitivity and safety. Mathematical equations were derived in order to calculate the desorption reaction rate constant of a contaminant. This procedure was applied to five contaminants: o-xylene, ethanol absolute, n-dodecane, diphenyl oxide, and diallyl-o-phthalate. The results indicated that the desorption reaction rate constant increased with temperature. The vapor pressure and chemical structure of the contaminants also affected the desorption reaction rate constant. Temperature had a predominant effect on the desorbing kinetics of the contaminants. The equilibrium times of desorption decreased as the temperature increased; for example, the equilibrium times of o-xylene were ≥4, 4, and 1 h at 40, 70, and 100 °C, respectively.

Graphical abstract: Mathematical equations combined with the MHE-GC method to study desorption kinetics of contaminants from food-package paper to air

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Publication details

The article was received on 04 Aug 2017, accepted on 03 Oct 2017 and first published on 04 Oct 2017


Article type: Paper
DOI: 10.1039/C7NJ02872E
Citation: New J. Chem., 2017,41, 13838-13845
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    Mathematical equations combined with the MHE-GC method to study desorption kinetics of contaminants from food-package paper to air

    C. Huang, Y. Zhao, Y. Liu and S. Wang, New J. Chem., 2017, 41, 13838
    DOI: 10.1039/C7NJ02872E

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