The principle of the method specified is aspirating the sample into a gas flame of sufficient thermal energy to cause any sodium and potassium present to emit its characteristic radiation and measuring the intensity at a wavelength of 589,0 nm for sodium and 766,5 nm for potassium. Applies to water samples with a mass concentration of sodium and potassium of up to 10 mg/l. For higher concentrations, a smaller test portion is taken for analysis. The lower limits of determination are less than 0,1 mg/l for both sodium and potassium.
État actuel: PubliéeDate de publication: 1993-05Stade: Norme internationale confirmée [90.93]
Edition: 1Nombre de pages: 5
Comité technique :ISO/TC 147/SC 2ICS :13.060.50
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