YS/T 461.2-2003 The methods for chemical analysis of lead and zinc bulk concentrates-The determination of iron content-The Na_2EDTA titrmetric method (English Version)
2013YS/T 461.2-2013 Methods for chemical analysis of lead and zinc bulk concentrates.Part 2:The determination of iron content.Na<下标2>EDTA titrimetric method
2003YS/T 461.2-2003 The methods for chemical analysis of lead and zinc bulk concentrates-The determination of iron content-The Na_2EDTA titrmetric method