Analysis of gold and precious metals by alkali meltingAnalysis of gold and precious metals by alkali meltingAnalysis of gold and precious metals by alkali meltingAnalysis of gold and precious metals by alkali meltingAnalysis of gold and precious metals by alkali meltingAnalysis of gold and precious metals by alkali meltingAnalysis of gold and precious metals by alkali meltingAnalysis of gold and precious metals by alkali meltingAnalysis of gold and precious metals by alkali melting