1.1本试验方法对粒径测量很有价值，包括使用电感应区（ESZ）装置在大约1至450μm的总粒径范围内测定色谱介质的粒径分布。该仪器使用小尺寸的电流路径，该电流路径由穿过孔径的单个粒子通道调制，并产生与粒子体积成比例的单个振幅脉冲( 1. ).² 1.2以国际单位制表示的数值应视为标准。 1.3 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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 必须认识到，通过本试验方法或使用不同物理原理测定粒径的任何其他试验方法获得的结果可能不一致。结果受到每种粒度分析方法使用的物理原理的强烈影响。任何粒度测定方法的结果只能在相对意义上使用，在比较其他方法获得的结果时，不应将其视为绝对值。 色谱介质的卖方和买方都会发现，如果所有相关方都能接受该测试方法，则该测试方法对于确定材料规格、制造控制以及开发和研究的粒度分布非常有用。

1.1 This test method is valuable for the measurement of particle size and covers determination of the particle size distribution of chromatography media in the overall size range of approximately 1 to 450 μm using the electric sensing zone (ESZ) apparatus. This instrument uses an electric current path of small dimensions that is modulated by individual particle passage through an aperture and produces individual pulses of amplitude proportional to the particle volume ( 1 ).² 1.2 The values stated in SI units are to be regarded as the standard. 1.3 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== It is important to recognize that the results obtained by this test method or any other test method for particle size determination using different physical principles may disagree. The results are strongly influenced by physical principles used by each method of particle size analysis. The results of any particle sizing method should be used only in a relative sense and should not be regarded as absolute when comparing results obtained by other methods. Both sellers and purchasers of chromatography media will find the test method useful if mutually acceptable to all parties concerned to determine the particle size distributions for materials specifications, manufacturing control, and development and research.