ISO 5318:1983 PDF
Fertilizers — Determination of potassium content — Potassium tetraphenylborate gravimetric method (Reference method)
Open preview (PDF)Fertilizers — Determination of potassium content — Potassium tetraphenylborate gravimetric method (Reference method)Title (English):
ISO 5318:1983
Fertilizers — Determination of potassium content — Potassium tetraphenylborate gravimetric method (Reference method)
- Document status:
- Withdrawn
- Format:
- Electronic (PDF)
- Number of pages:
- 3
- Publication date:
- December 1, 1983
- Edition:
- ISO IS 5318 edition 1 version 1
- ICS:
- 65.080
Description (English):
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.
Technical details
- Technical committee
- ISO/TC 134 - Fertilizers, soil conditioners and beneficial substances
- SKU
- ISO 5318:1983
