ISO 27891:2015 气溶胶粒子数浓度 凝结粒子计数器的校准
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
ISO 27891:2015描述了在1 cm-3和105 cm-3之间的颗粒数浓度下确定冷凝颗粒计数器(CPC)的检测效率的方法，以及相关的测量不确定度。通常，检测效率将取决于颗粒数浓度、颗粒尺寸和颗粒组成。本国际标准中描述的方法所覆盖的粒度范围为约5nm至1000nm。因此，所述方法既可用于确定在检测效率相对恒定(平台效率)的较大颗粒尺寸范围内应用的CPC校准因子，也可用于表征在接近检测下限的小颗粒尺寸下CPC检测效率的下降。这些参数在附录A中有更详细的描述。这些方法适用于入口流量在大约0.1 L/min和5L/min之间的CPC。本国际标准描述了一种用于估计根据本国际标准执行的CPC校准的不确定度的方法。
ISO 27891:2015 describes methods to determine the detection efficiency of condensation particle counters (CPCs) at particle number concentrations ranging between 1 cm-3 and 105 cm-3, together with the associated measurement uncertainty. In general, the detection efficiency will depend on the particle number concentration, the particle size, and the particle composition. The particle sizes covered by 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 the range 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 detection limit. 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 calibration performed according to this International Standard.
标准预览图
