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ISO 9964-2:1993

Water quality — Determination of sodium and potassium — Part 2: Determination of potassium by atomic absorption spectrometry

Publication date:   Apr 28, 1993

General information

90.93   Standard confirmed   Apr 1, 2026

ISO

ISO/TC 147/SC 2 Physical, chemical and biochemical methods

International Standard

13.060.50   Examination of water for chemical substances

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Scope

The principle of the method specified is adding a caesium chloride solution to the sample as an ionization suppressant, aspirating the sample directly into the air/acetylene flame of an atomic absorption spectrometer and measuring the absorbance at a wavelength of 766,5 nm. Applies to water samples with a mass concentration of potassium in the range from 5 mg/l to 50 mg/l. This range can be extended if other dilution factors are chosen.

Life cycle

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PUBLISHED
ISO 9964-2:1993
90.93 Standard confirmed
Apr 1, 2026