Evaluation of a novel passive sampling technique for monitoring volcanogenic hydrogen sulfide
| Autor: | Tamsin A. Mather, Claire J. Horwell, Andrew G. Allen, John E. Patterson |
|---|---|
| Rok vydání: | 2004 |
| Předmět: |
chemistry.chemical_classification
Air Pollutants Quenching (fluorescence) Silver halide Sulfide Hydrogen sulfide Public Health Environmental and Occupational Health Analytical chemistry General Medicine Volcanic Eruptions Management Monitoring Policy and Law equipment and supplies Sensitivity and Specificity Volumetric flow rate Silver nitrate chemistry.chemical_compound chemistry Hydrogen Sulfide Absorption (electromagnetic radiation) Photographic paper Environmental Monitoring |
| Zdroj: | Journal of environmental monitoring : JEM. 6(7) |
| ISSN: | 1464-0325 |
| Popis: | 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 approximately 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 |
| Databáze: | OpenAIRE |
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