Water quality -- Determination of sodium and potassium -- Part 3: Determination of sodium and potassium by flame emission spectrometry

Document Number: NL ISO 9964 3 : 2010
Sector: Food Technology
TC: NL TC 147
ICS: 13.060.50
1.1 Field of application This International Standard specifies a method for the determination of dissolved sodium and potassium by flame emission spectrometry (FES). It is intended for the analysis of raw and drinking waters. The method is applicable to water samples with a mass concentration of sodium and potassium of up to 10 mg/l. For samples containing higher concen- trations of sodium and potassium, a smaller test por- tion is taken for analysis. The lower limits of determination are less than 0,l mg/l for both sodium and potassium. 1.2 Interferences The ions normally present in raw and drinking waters do not interfere with the flame emission spectro- metric method for sodium and potassium if an ionization suppressant is present