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样品粒度是粉体地质标准物质的一项重要特性指标。长期以来地质标准物质的粒度一直是采用筛分法或沉降法检测,最终大多以加工样品通过一定筛目(一般为-200目)的比例来表达;近年来超细标准物质研制引入了以激光粒度仪为代表的粒度检测与分析的现代方法,并可以直观的粒度分布图和简洁明晰的特征粒径等多种方法来表达粒度分布特征,大大提升了粉体地质标准物质粒度分布特性的测量及表征水平。文章在前期采用激光粒度仪测量超细标准物质粒度分布特征工作的基础上,用此法测量了当今广泛使用的典型地质标准物质的粒度分布,为这些标准物质的正确使用和取样不确定度评价提供了重要依据;同时就今后地质标准物质乃至地质分析样品的粒度检测与表征提出建议。
Sample size is an important characteristic indicator of powder geological material. For a long time, the particle size of geological standards has been detected by sieving or sedimentation method. Most of the samples are usually expressed in terms of the proportion of processed samples passing through a certain number of meshes (usually -200 meshes). In recent years, Particle size analyzer as the representative of the detection and analysis of the particle size of the modern method, and the intuitive particle size distribution and concise clear features of particle size and other methods to express the characteristics of particle size distribution, greatly enhance the particle size distribution of the characteristics of the powder geology standard measurement And characterization level. Based on the work of measuring particle size distribution characteristics of ultrafine standard materials by laser particle sizer in the early stage, the particle size distribution of typical geological reference materials widely used today is measured by this method. The correctness of the use of these reference materials and the uncertainty of sampling are evaluated Provide an important basis; at the same time on the geological standards and geological analysis samples particle size detection and characterization recommendations.