Manganese ores — Determination of chromium content — Diphenylcarbazide photometric method and silver persulphate titrimetric method
NORMA vydaná dňa 1.12.1981
Označenie normy: ISO 619:1981-ed.2.0
Dátum vydania normy: 1.12.1981
Počet strán: 4
Približná hmotnosť: 12 g (0.03 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy ISO
Description / Abstract: 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.