The method consists in preparing of a test solution as specified in ISO 5317, precipitating of potassium ions by sodium tetraphenylborate in a weakly alkaline medium in the presence of disodium ethylenediaminetetraacetate dihydrate (EDTA, disodium salt) and formaldehyde, followed by filtrating of the precipitate, drying and weighing.
Status : WithdrawnPublication date : 1983-12
Edition : 1Number of pages : 3
Technical Committee:Fertilizers, soil conditioners and beneficial substances
A standard is reviewed every 5 years
Revisions / Corrigenda