Vergleich von passiven Messmethoden für Ozon an lufthygienischen Stationen im Alpenraum

In a joint European project under the leadership of the Research Centre for Environment and Human Health, Neuherberg, in 1992 comparison of different passive ozone monitoring methods was carried out at 6 monitoring sites, representing high mountain areas, alpine mountain valleys, rural sites in lowland and highly polluted urban sites. A thorough calibration program for the continuous UV ozone monitors was performed, so that the accuracy of the monitors could be to lie within ± 5%. For the passive samplers, the following principles were applied: tube type samplers with chemisorption of ozone by di(pyridyl)ethylene, batch type with the same absorption principle, indigo color change of Indigo on impregnated filters, tube type sampler equipped with indigo, surface active monitoring with potassium iodide on a glass fiber filter. The correlation coefficients between passive devices and continuous ozone monitors varied from 0.91 to 0.33 for weekly, and from 0.84 to 0.62 for fortnight exposures and most devices followed the concentration trends well over the 22 week observation period.