标准编号：ISO 9276-2:2014
中文名称：颗粒大小分析结果 第2部分：颗粒大小分布的平均大小/直径和力矩
英文名称：Representation of results of particle size analysis — Part 2: Calculation of average particle sizes/diameters and moments from particle size distributions
发布日期：2014-05
标准范围
This part of ISO 9276 provides relevant equations and coherent nomenclatures for the calculation ofmoments, mean particle sizes and standard deviations from a given particle size distribution. Twonotation systems in common use are described. One is the method of moments while the seconddescribes the moment-ratio method. The size distribution may be available as a histogram or as ananalytical function.The equivalent diameter of a particle of any shape is taken as the size of that particle. Particle shapefactors are not taken into account. It is essential that the measurement technique is stated in the reportin view of the dependency of sizing results of measurement principle. Samples of particles measured areintended to be representative of the population of particles.For both notation systems, numerical examples of the calculation of mean particle sizes and standarddeviation from histogram data are presented in an annex.The accuracy of the mean particle size may be reduced if an incomplete distribution is evaluated. Theaccuracy may also be reduced when very limited numbers of size classes are employed.
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