This standard specifies the determination method of lead content in alloy gold. This standard is applicable to the determination of lead content in alloy gold (mined gold, smelted crude gold products and recovered gold, etc.). Measuring range: 1% to 15%.
GB/T 15249.4-1994 history
2009GB/T 15249.4-2009 Methods for chemical analysis of crude gold.Part 4:Determination of lead content.EDTA titrimetric method
1994GB/T 15249.4-1994 Crude Gold-Determination of lead content-EDTA titrimetric method