|Standard Number||PNS ISO/TR 20489:2021|
|Organization||Bureau of Philippine Standards|
|Category||Guide | Practice|
This Standard provides an overview of approaches of sample preparation (i.e. pre-treatment and size-fractionation) for analytical measurements applied to surface and drinking water, potentially containing relevant amounts and types of metal and metal oxide nano-objects, including collection from source and storage of samples, pre-concentration of analytes, and their fractionation.