本文件规定了粉末状工程纳米颗粒样品的基本特性，以确定尺寸、化学含量和表面积。本文件还规定了确定每个特性的测量方法。 它旨在促进消费者、监管机构和具有必要特征的行业之间的沟通。 它不包括与粉末状纳米颗粒的特定工业应用有关的特征和详细的测量协议，以及与健康、安全和环境问题有关的特征。

This document specifies the fundamental characteristics to be measured of a sample of engineered nanoparticles in powder form to determine the size, the chemical content and the surface area. This document also specifies measurement methods for determining each of the characteristics. It is intended to facilitate communication among consumers, regulators and industries with the necessary characteristics. It excludes characteristics that pertain to specific industrial applications of nanoparticles in powder form and detailed measurement protocols, as well as characteristics related to health, safety and environmental issues.