 More ANALYTICAL CHEMISTRY OF THE NOBLE METALS - Fire 0000-00-00 FIRE ASSAY Classical lead assay Without any doubt the classical lead assay has proved to be the most import-ant procedure for the concentration and isolation of the noble metals. In 0000 Beamish stated that during 00 years of research in this field he had not experienced a single example of failure of the classical assay to find a paying ore. More 