阐述了光子相关光谱学（PCS）在测量平均粒径和测量分散在液体中的颗粒的粒径分布宽度方面的应用。它适用于粒径从几纳米到约1µ的颗粒，或适用于开始沉淀的颗粒。本标准与ISO 13321:1996相同，并根据ISO 13321:1996复制。

Sets out the application of photon correlation spectroscopy (PCS) to the measurement of an average particle size and a measure of the broadness of the size distribution of particles dispersed in liquids. It is applicable to particle sizes ranging from a few nanometers to about 1 µ, or to the onset of sedimention. This Standard is identical with and has been reproduced from ISO 13321:1996.