Manganese ores -- Determination of vanadium content -- Titrimetric method and phosphotungstovanadate photometric method
Method I is applicable to manganese ores having vanadium contents greater than 0.05 % (m/m), method II is applicable to manganese ores having vanadium contents less than 0.05 % (m/m). This second edition cancels and replaces the first edition (i.e. ISO 553-1975). Should be read in conjunction with ISO 4297.
A standard is reviewed every 5 years
Revisions / Corrigenda