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: ISO/TC 134 Fertilizers, soil conditioners and beneficial substances
- ICS :
- 65.080 Fertilizers
ISO 5318:1983Stage: 95.99
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