ISO 7969:1985 Preview
Manganese ores and concentrates -- Determination of sodium and potassium contents -- Flame atomic absorption spectrometric method
This standard was last reviewed and confirmed in 2016. Therefore this version remains current.
The method is applicable to products having sodium contents from 0,02 to 1,0 % (m/m), and potassium contents from 0,08 to 3,0 % (m/m). ISO 7969 should be read in conjunction with ISO 4297. Specifies principle, reagents, apparatus, sampling, procedure and expression of results.