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Issue 40, 2018
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Evaluation of the adsorption and desorption properties of zeolitic imidazolate framework-7 for volatile organic compounds through thermal desorption-gas chromatography

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Abstract

The adsorption mechanism and desorption properties of volatile organic compounds (VOCs) in a zeolitic imidazolate framework (ZIF-7) were studied by on-line thermal desorption-gas chromatography (TD-GC), and a high efficiency method for determination of harmful indoor gas levels has been developed. The loading volume, loading flow rate and desorption temperature were optimized. Additionally, ZIF-7 has been proved to be an effective adsorbent and its adsorption performance is superior to that of commercial Tenax TA and activated carbon. It has been proved that ZIF-7 is an ideal adsorbent for VOCs. It was suggested that there are hydrophobic interactions, π–π stacking effects, “gate-opening” effects and molecular size effects between adsorbates and ZIF-7. Therefore, the developed ZIF-7-based TD-GC method offered an excellent performance with a detection limit of 1.22–2.38 ng (S/N = 3), a quantification limit of 4.05–7.94 ng (S/N = 10), and a good linearity (R2 = 0.99), and relative standard deviation values (RSD, n = 5) were found to be in the range of 1.69–7.97%, and tube-to-tube reproducibility for three parallel tubes was 8.01%.

Graphical abstract: Evaluation of the adsorption and desorption properties of zeolitic imidazolate framework-7 for volatile organic compounds through thermal desorption-gas chromatography

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Publication details

The article was received on 21 Aug 2018, accepted on 26 Sep 2018 and first published on 27 Sep 2018


Article type: Paper
DOI: 10.1039/C8AY01856A
Citation: Anal. Methods, 2018,10, 4894-4901

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    Evaluation of the adsorption and desorption properties of zeolitic imidazolate framework-7 for volatile organic compounds through thermal desorption-gas chromatography

    Y. Zhao, L. Yu, X. Xia, X. Yang, W. Hu and Y. Lv, Anal. Methods, 2018, 10, 4894
    DOI: 10.1039/C8AY01856A

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