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Issue 21, 2013
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Surface modified annular wet denuder for the collection of water-soluble trace gases

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Abstract

An annular wet denuder with both annular surfaces functioning as a sink for gaseous molecules is described. A gas absorbing solution was continuously flowed down the stainless-steel inner tube exterior and the outer tube interior gas collection surfaces of the denuder. In order to enhance the gas collection efficiency, the gas collection surfaces were modified with a Nylon monofilament and a perfluoroalkoxy alkane screen mesh cloth. The collection efficiency was increased by coiling the monofilament around the inner tube exterior, and by fixing the screen mesh cloth on the outer tube interior (e.g. 1.67 ± 0.06 and 1.77 ± 0.01 times at a gas absorbing solution flow rate of 0.30 cm3 min−1 tube−1, respectively). At a sampling flow rate of 1.0 dm3 min−1, 97.7 ± 0.53% of the trace gas was collected with the surface modified annular wet denuder. The response speeds of the analytical signal change (10% → 90% and 90% → 10%) were 5.0 ± 0.9 min and 4.4 ± 0.2 min, respectively. Quantitative collection of water-soluble trace gas and reasonably rapid response time were achieved with the developed device.

Graphical abstract: Surface modified annular wet denuder for the collection of water-soluble trace gases

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Publication details

The article was received on 24 Apr 2013, accepted on 07 Sep 2013 and first published on 09 Sep 2013


Article type: Paper
DOI: 10.1039/C3AY40680F
Citation: Anal. Methods, 2013,5, 6071-6075
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    Surface modified annular wet denuder for the collection of water-soluble trace gases

    M. Takeuchi, M. Izumi, M. Watanabe, H. Tanaka, T. Obata and K. Toda, Anal. Methods, 2013, 5, 6071
    DOI: 10.1039/C3AY40680F

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