Abstract

Measurements of air samples taken near the ground at different locations in urban as well as in rural areas show the presence of acetonitrile (CH3CN) in concentrations up to 7 ppbv. The measurements of this compound were carried out by a gas chromatographic method with an electron capture detector and by a mass spectrometric method with a GC‐MS quadrupol mass filter system. The present results support tropospheric sources for acetonitrile recently found in stratospheric ion‐clusters.

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