International Comparison CCQM-P189: Particle number concentration (100 to 20 000 cm-3) and particle charge concentration (0.15 to 3 fC cm-3)

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International Comparison CCQM-P189: Particle number concentration (100 to 20 000 cm-3) and particle charge concentration (0.15 to 3 fC cm-3)

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Brown, A; Quincey, P; Ebert, V; Nowak, A; Tompkins, J; Hessey, I; Ciupek, K; Schaefer, C; Werhahn, O; Vasilatou, K; Luond, F; Mace, T; Gaie-Levrel, F; Bregonzio-Rozier, L; Oganyan, N; Belenkii, D; Sakurai, H; Murashima, Y; Liu, J; Jung, J; Seeger, S; Wiedensohler, A; Tuch, T; Merkel, M; Weinhold, K (2023) International Comparison CCQM-P189: Particle number concentration (100 to 20 000 cm-3) and particle charge concentration (0.15 to 3 fC cm-3). NPL Report. ENV 47

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Official URL: https://doi.org/10.47120/npl.ENV47

Abstract

This report presents the results of CCQM-P189, a pilot comparison between 10 laboratories which tested the participants’ capability to measure particle number concentration (in the range of 100 to 20 000 cm-3) using condensation particle counters (CPCs), and particle charge concentration (in the range of 0.15 to 3 fC cm-3) using aerosol electrometers (AEs).

Measurements of aerosol particle number concentration are needed to demonstrate compliance to vehicle emission legislation and are becoming increasingly important in other areas such as ambient air and workplace monitoring. The measurements are typically carried out using condensation particle counters, which are calibrated using either reference CPCs or reference AEs.

An analogous report is available for the CCQM-K150 comparison. CCQM-K150 was identical to, and used the same experimental data as CCQM-P189 with one exception: data from TROPOS, which is not an National Measurement Institute (NMI) or Designated Institute (DI), were only included in CCQM-P189.

CCQM-P189 was an amount-of-substance Track C comparison.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	ENV 47
Keywords:	CCQM, Comparison, particles, number concentration, charge concentration
Subjects:	Environmental Measurement > Air Quality and Airborne Particulates
Divisions:	Atmospheric Environmental Sciences
Identification number/DOI:	10.47120/npl.ENV47
Last Modified:	17 Apr 2023 13:21
URI:	https://eprintspublications.npl.co.uk/id/eprint/9684