Abstract
The method consists in precipitating of potassium ions by an excess of sodium tetraphenylborate (NaTPB) in a weakly alkaline medium, filtrating and determing of the unused NaTPB by back titration with cetyltrimethylammoniumbromide solution. The test solution shall be prepared as specified in ISO 5317 or ISO 7407.
General information
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Status: WithdrawnPublication date: 1986-12Stage: Withdrawal of International Standard [95.99]
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Edition: 1Number of pages: 4
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Technical Committee :ISO/TC 134ICS :65.080
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