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ISO 619:1981
M00000133
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ISO 619:1981 Manganese ores -- Determination of chromium content -- Diphenylcarbazide photometric method and silver persulphate titrimetric method
standard by International Organization for Standardization, 12/01/1981
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Method I is applicable to manganese ores having chromium contents less than 0.1 % (m/m), method II is applicable to manganese ores having chromium contents greater than 0.1 % (m/m). This second edition cancels and replaces the first edition (i.e. ISO 619-1975). Should be read in conjunction with ISO 4297.