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    Table of ContentsPreparation of Samples & Chemical AnalysesReducing-Power of the OreAssay of Dead-Roasted Silver OreDead-Roasted Silver ConcentratesAcidic SlagsBasic SlagsUse of Borax in ExcessNormal Charge for Coppery OreEffects of Litharge used in ExcessSpecial Scorification-TestsSignificance of Assay Results Among smelters generally, the prevailing

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    Processes. Homogenization & sampling Each shipment of Non Good Delivery (NGD) precious metals is first weighted and melted to ensure homogeneity. Sampling is then undertaken, the method chosen depending on the quantity and kind of material received. Analysis The oratory analyses for gold, silver, platinum group metals and over 40 other elements and compounds.

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