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Issue 7, 2004
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Evaluation of a novel passive sampling technique for monitoring volcanogenic hydrogen sulfide

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Abstract

A novel, low-cost passive sampling procedure for monitoring of volcanogenic hydrogen sulfide is reported. The technique is based on absorption of H2S onto treated sections of photographic paper, which are housed in plastic film canisters during exposure. The H2S reacts with silver halide in the photographic paper, causing a colour-change reaction from white, through brown, to black, depending on concentration of atmospheric H2S. The sampler is sensitive to ≪30 ppb to ∼1000 ppb of H2S. Here we present results from a series of optimization and quantification experiments. An active sampling procedure for rapid H2S measurement is also reported, based on absorption of H2S onto Whatman No. 41 cellulose filters treated with silver nitrate, and was shown to be quantitative using a single filter at flow rates <1.0 L min−1 for collection of <200 μg of sulfide (as H2S). Determination of sulfide collected on the substrates was performed using a rapid flow-injection technique based on the fluorescence quenching of fluorescein mercuric acetate (FMA) by sulfide. This was optimized at a FMA concentration of 8 mg L−1, at which 100% quenching was obtained at a solution sulfide concentration of 3 mg L−1.

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Publication details

The article was received on 19 Jan 2004, accepted on 26 Mar 2004 and first published on 23 Apr 2004


Article type: Paper
DOI: 10.1039/B400746H
Citation: J. Environ. Monit., 2004,6, 630-635
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    Evaluation of a novel passive sampling technique for monitoring volcanogenic hydrogen sulfide

    C. J. Horwell, A. G. Allen, T. A. Mather and J. E. Patterson, J. Environ. Monit., 2004, 6, 630
    DOI: 10.1039/B400746H

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