METHOD OF PREPARATION FOR FIRE ASSAY OF SAMPLE OF GOLD CONTAINING ORES

摘要

FIELD: chemistry.;SUBSTANCE: invention relates to analytical chemistry and can be used to determine fine-dispersed precious metals in gold-bearing mineral raw materials of medium and acid composition. Method comprises treating a sample of ore, ground to a grain size minus 1 mm, with concentrated hydrofluoric acid or a mixture thereof with other mineral acids. Precipitate is filtered through a dense filter, filtering is carried out, the precipitate is mixed with the gel and the reducing agent, and the mixture is poured into a paper bag. And the mixture from above is covered with a tire, consisting of soda ash and finely divided glass. Backfilling with a layer of sludge with a glue and a reducing agent is carried out in a paper bag containing a mixture of soda and borax, taken in the ratio 3.5:1.5.;EFFECT: invention increases the speed of the determination of precious metals, reduces the consumption of reagents.;1 cl, 2 tbl, 2 ex