Reference number
ISO 5318:1983
ISO 5318:1983
Fertilizers — Determination of potassium content — Potassium tetraphenylborate gravimetric method (Reference method)
Edition 1
1983-12
Withdrawn
ISO 5318:1983
11325
Withdrawn (Edition 1, 1983)

Abstract

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.

General information

  •  : Withdrawn
     : 1983-12
    : Withdrawal of International Standard [95.99]
  •  : 1
     : 3
  • ISO/TC 134
    65.080 
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