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ISO 4571:1981
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ISO 4571:1981 Manganese ores and concentrates -- Determination of potassium and sodium content -- Flame atomic emission spectrometric method
standard by International Organization for Standardization, 03/01/1981
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The method is applicable to a concentration range of 0,08 to 3 % (m/m) of potassium and 0,02 to 1 % (m/m) of sodium. ISO 4571 should be read in conjunction with ISO 4297. Specifies principle, reagents, apparatus, procedure and expression of results.