Abstract
Three "standard" Nolan-Pollak (N-P) and modified N-P design condensation nucleus (CN) counters were included in the Vienna Workshop on Intercomparison of Condensation Nuclei and Aerosol Particle counters. These counters came from diverse backgrounds, namely programs in USA, Europe and Australia. In this work, principles of the operation and previous history of calibration of the N-P expansion counter are briefly reviewed and comparisons between the particular counters used in the workshop are presented and discussed. Counting agreement was found to be very good between the N-P counters, typically better than ± 12% for a range of aerosol sizes and compositions from a minimum diameter of 4 nm. The independently calibrated GIV CNC-440 (modified N-P type counter) also agreed well with the N-P counters. The minimum size sensitivity of the N-P counter was examined showing a lower detection limit for insoluble (Ag) particles of around 2.6 ± 0.3 nm diameter. © 2002 Elsevier Science B.V. All rights reserved.
Recommended Citation
J. L. Gras et al., "Nolan-Pollak Type CN Counters in the Vienna Aerosol Workshop," Atmospheric Research, vol. 62, no. 3 thru 4, pp. 239 - 254, Elsevier, Jul 2002.
The definitive version is available at https://doi.org/10.1016/S0169-8095(02)00012-1
Department(s)
Physics
Keywords and Phrases
Aerosol number concentration; Condensation nuclei counter; Detection efficiency; Intercomparison study
International Standard Serial Number (ISSN)
0169-8095
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Elsevier, All rights reserved.
Publication Date
18 Jul 2002
