Summary
A recently developed diffusive sampler, intended for use in long-term ambient measurements of volatile aromatic hydrocarbons, has been tested to determine the upper limits of its sampling capacity. A test has been performed over 12-month period to evaluate these limits in terms of its ‘internal consistency’ (i.e. checking if the sum of the amounts of a given pollutant, determined over shorter consecutive periods, matches the amount determined from a single long-term exposure). Results demonstrate that the uptake rate of the device, in a real (indoor) atmosphere, is constant for approximately 8 months for benzene and for approximately 10 months for toluene. The upper limit for higher homologous species was not reached after exposure for a year to typical ambient concentrations. This means the device can be successfully used for several months, thereby enabling low-cost determinations of ambient BTX concentrations.
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Bertoni, G., Tappa, R. & Allegrini, I. The internal consistency of the ‘analyst’ diffusive sampler—A long-term field test. Chromatographia 54, 653–657 (2001). https://doi.org/10.1007/BF02492194
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DOI: https://doi.org/10.1007/BF02492194