Abstract
Activated C is a useful medium for simultaneous sampling of trace gases. However, preferential canals in the C cartridge and water vapor condensation should be avoided. The most critical component is metallic Hg. Based on the principle of permeation, a Hg calibration gas was prepaired with a concentration range between 4 and 300 μg·m−3. The collection efficiency of Hgo on activated C as a function of temperature and flow was studied. It appeared that the residence time (flow) and temperature should be carefully chosen. The collection efficiency decreases at increasing temperature and increasing flow. Hg adsorption in tubes, plane filters, in-depth filters and thimble filters was also investigated. Based on the results obtained a sampling train is made for sampling flue gases. The same train can also be used for sampling ambient air.
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Meu, R. A sampling method based on activated carbon for gaseous mercury in ambient air and flue gases. Water, Air, and Soil Pollution 56, 117–129 (1991). https://doi.org/10.1007/BF00342266
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DOI: https://doi.org/10.1007/BF00342266