This standard establishes photometric methods for the determination of copper with a mass fraction of copper from 0.001 to 0.6% in lead-antimony alloys
GOST 1293.2-1983 Referenced Document
GOST 1027-1967 Reagents. Lead (II) acetate trihydrate. Specifications
GOST 1293.0-1983 Lead-antimony alloys. General requirements for methods of chemical analysis