Reference number
ISO 5318:1983
© ISO 2024
ISO 5318:1983
Fertilizers — Determination of potassium content — Potassium tetraphenylborate gravimetric method (Reference method)
Edition 1
1983-12
Withdrawn
Withdrawn (Edition 1, 1983)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

  • Status
     : Withdrawn
    Publication date
     : 1983-12
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 3
  • Technical Committee :
    ISO/TC 134
    ICS :
    65.080 
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