ISO 5318:1983
$12.35
Fertilizers — Determination of potassium content — Potassium tetraphenylborate gravimetric method (Reference method)
| Published By | Publication Date | Number of Pages |
| ISO | 1983-12 | 5 |
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.
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