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.