Prezentul standard stabile?te metodele de determinare a con?inutului de zinc din minereuri ?i concentrate de cupru, plumb, zinc, bismut, molibden, pirit? ?i sulfuri complexe ?i anume :
— metoda poten?iometric? ?n dou? variante ?i anume :
— varianta a —
STAS 1269/4-1989 history
1989STAS 1269/4-1989 COPPER, LEAD, ZING, BISMUTH, MOLYBDENUM, PYRITE AND COMPLEX SULPHURE ORES AND CONCENTRATES Zinc content determination