NO2MEASUREMENT WITH A PASSIVE SAMPLER: ASSESSMENT OF THE SENSITIVITY OF TWO TYPES OF PALMES DIFFUSION TUBES FOR NO2

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).