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 ¿¿, or to the onset of sedimention. This Standard is identical with and has been reproduced from ISO 13321:1996.RECONFIRMATION NOTICETechnical Committee NT-001 has reviewed the content of this publication and inaccordance with Standards Australia procedures for reconfirmation, it has beendetermined that the publication is still valid and does not require change.Certain documents referenced in the publication may have been amended since theoriginal date of publication. Users are advised to ensure that they are using the latestversions of such documents as appropriate, unless advised otherwise in thisReconfirmation Notice.Approved for reconfirmation in accordance with Standards Australia procedures forreconfirmation on 9 September 2016.The following are represented on Technical Committee NT-001:Accord AustralasiaAustralasian College of Toxicology