1.1 本指南阐述了通过激光衍射技术使用适当的湿或干方法测量粉末、悬浮液或泥浆粒度分布的一般方法。建议用于广泛粒度分布的测量。 1.2 该指南为应指定的参数提供了指南，并为基于体积的分布曲线中的点（如x）提供了合理和可接受公差的一般指南 10 （D） v 10） ，x 50 （D） v 50），x 90 （D） v 90）和D[4，3]（体积矩平均值）。值得注意的是，ISO更倾向于使用术语x表示粒径，而不是d或d（表示直径）的其他用法。 1.3 本指南结合仪器所有者的内部质量控制（QC）审计职能，提供了仪器性能验证指南。结果应按实践指示的格式报告 E1617 和ISO 13320。 1.4 单位- 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 用于粒度分布分析的激光衍射技术在工业界和学术界广泛用于在线控制和实验室需要。在这方面，指导显然很有用。 5.2 本指南可用于开发粒度分析方法- 现有的分析程序尚不存在。请参阅指南 B821 用于金属粉末和相关化合物的湿法分散的类似指南和有用程序。

1.1 This guide sets out the general approach to the particle size distribution measurement of powders, suspensions, or slurries using an appropriate wet or dry methodology by the laser diffraction technique. It is recommended for use in measurements of broad particle size distributions. 1.2 The guide provides guidelines to the parameters that should be specified and a generalized guideline to reasonable and acceptable tolerances for points in the volume-based distribution curve such as x 10 (D v 10), x 50 (D v 50), x 90 (D v 90), and D[4, 3] (volume moment mean). It is noted that ISO prefers the term x for particle size as opposed to other usage of d or D (implying diameter). 1.3 This guide provides guidance on the verification of instrument performance in conjunction with the internal quality control (QC) audit functions of the instrument owner. Results should be reported in the format indicated by Practice E1617 and ISO 13320. 1.4 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 The technique of laser diffraction for particle size distribution analysis is extensively used in industry and academia both for on-line control and laboratory needs. Guidance is obviously useful in this regard. 5.2 This guide can be used to develop methods of particle size analysis where well-established analysis procedures do not already exist. See Guide B821 for similar guidance and useful procedures for wet dispersion of metal powders and related compounds.