标准编号：ISO 27891:2015
中文名称：气溶胶粒子数浓度 凝结粒子计数器的校准
英文名称：Aerosol particle number concentration — Calibration of condensation particle counters
发布日期：2015-03
标准范围
This International Standard describes methods to determine the detection efficiency of condensationparticle counters (CPCs) at particle number concentrations ranging between 1 cm-3 and 105 cm-3, togetherwith the associated measurement uncertainty. In general, the detection efficiency will depend on theparticle number concentration, the particle size, and the particle composition. The particle sizes coveredby the methods described in this International Standard range from approximately 5 nm to 1 000 nm.The methods can therefore be used both to determine a CPC calibration factor to be applied across therange of larger particle sizes where the detection efficiency is relatively constant (the plateau efficiency),and to characterize the drop in CPC detection efficiency at small particle sizes, near the lower detectionlimit. These parameters are described in more detail in Annex A.The methods are suitable for CPCs whose inlet flows are between approximately 0,1 l/min and 5 l/min.This International Standard describes a method for estimating the uncertainty of a CPC calibrationperformed according to this International Standard.
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