SSH ISO 5318:2002

Fertilizers — Determination of potassium content — Potassium tetraphenylborate gravimetric method (Reference method)

Publication date: Jan 1, 2002

General information

Current stage: 60.60 Effective date: Jan 1, 2002

Originator: DPS

Owner: DPS/KT 190

Type: International Standard

ICS: 65.080

Languages: English

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Status: Published

PDF - ALL 1,190

Paper - ALL 1,190

CD - ALL 1,190

PDF and Paper - ALL 2,380

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Scope

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.

SSH ISO 5318:2002

Fertilizers — Determination of potassium content — Potassium tetraphenylborate gravimetric method (Reference method)

General information

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Scope

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Adopted from ISO 5318:1983