Abstract
The sensitivity of two types of Palmes diffusion tubes for NO2 have been evaluated in this study. This was under field conditions by exposing the two types of a Palmes diffusion tube simultaneously carried out at the Bockenheim (Frankfurt) air monitoring station, where NO2 is continuously monitored by a chemiluminescent NO2 analyzer. Results obtained indicate that the Passive Sampling tube a 8.20 cm in length is more sensitive and reliable, based on obtained accuracy values of 1.40–15.00%. The accuracy of the diffusion tube with length 7.47 cm varied from 10.70–36.80% of the actual value (continuous monitor).
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