FIELD: analytical chemistry of noble metals; assay analysis; determination of content of gold in ores of different mineralogical composition and in products of their processing (tailings, concentrates).
SUBSTANCE: proposed method includes melting of starting material with lead oxide, soda, borax and flour for obtaining lead alloy (crude lead), its cupellation till gold-silver regulus, dissolving of silver in diluted nitric acid and determination of amount of gold by weighing or by any other instrumental method. Melting process is carried out in metal crucibles at temperature of 600-800°C for 10-30 minutes; charge per 10 g of sample contains the following components: 20-50 g of sodium or potassium hydroxide; 2-20 g of borax; 1-10 g of soda; 15-30 g of litharge and 1-3 g of flour. Method is recommended for assay of samples having mass of 10-100 g.
EFFECT: facilitated procedure and low cost of assay.
1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF IDENTIFICATION OF NOBLE METALS IN SULFIDE ORES AND THEIR PROCESSING PRODUCTS | 2008 |
|
RU2365644C1 |
| GOLD CONTENT DETERMINATION IN GOLD-CONTAINING RAW MATERIAL | 2003 |
|
RU2245931C1 |
| METHOD FOR DETERMINING CONTENT OF PRECIOUS METALS IN ORES AND THEIR DERIVATIVES | 2010 |
|
RU2443790C1 |
| A METHOD OF ASSAY OF GOLD AND SILVER IN ORES AND CONCENTRATES | 0 |
|
SU1431482A1 |
| PROCEDURE FOR DETERMINATION OF GOLD IN ORE AND CONCENTRATES | 2010 |
|
RU2434063C1 |
| METHOD OF PROCESSING GRAVITY SEPARATION CONCENTRATES CONTAINING PRECIOUS METALS | 1999 |
|
RU2156820C1 |
| METHOD OF QUALITATIVE AND QUANTITATIVE DETERMINATION OF ORGANIC COMPOUNDS OF NOBLE METALS IN ROCKS OF VARIOUS COMPOSITIONS | 2007 |
|
RU2354967C1 |
| ASSAY METHOD OF CUPELLATION FOR GOLD- AND SILVER-CONTAINING LEAD ALLOYS | 2002 |
|
RU2237734C2 |
| METHOD OF RECOVERING GOLD FROM GOLD ORE CONCENTRATES | 2004 |
|
RU2259410C1 |
| 0 |
|
SU145895A1 |
