BS PD CEN/TS 16976:2016描述了测定颗粒数浓度的标准方法 在高达107cm-3的环境空气中，平均时间等于或大于1分钟。标准 该方法基于在计数模式下运行的冷凝粒子计数器（CPC）和适当的 浓度超过计数模式范围的稀释系统。它还定义了性能 所用仪器的特性和最低要求。上下尺码 本文件中分别考虑了7纳米和几微米。 本文件描述了 取样、操作、数据处理和QA/QC程序，包括校准参数。交叉引用:ISO 278912008/50/E购买本文件时提供的所有现行修订均包含在购买本文件中。

BS PD CEN/TS 16976:2016 describes a standard method for determining the particle number concentration in ambient air in a range up to about 107cm-3for averaging times equal to or larger than 1 min. The standard method is based on a Condensation Particle Counter (CPC) operated in the counting mode and an appropriate dilution system for concentrations exceeding the counting mode range. It also defines the performance characteristics and the minimum requirements of the instruments to be used. The lower and upper sizes considered within this document are 7 nm and a few micrometres, respectively. This document describes sampling, operation, data processing and QA/QC procedures including calibration parameters.Cross References:ISO 278912008/50/ECAll current amendments available at time of purchase are included with the purchase of this document.