After leaching is completed, the slurry is filtered to separate the liquid and solid parts, determine their characteristics and analyze them. The solid residue is thoroughly washed and sent directly to the analysis to determine the residual contents of precious metals, or divided into fractions by size to determine not only the total content of metals, but also their distribution by fractions. Screen separation of the leached residue and analysis by fractions, as a rule, is considered to be more preferable, as you can obtain information about particle sizes of the source material at which precious metal is released best of all. The results of process tests by the method of bottle agitation allow to quickly assess the degree of suitability of ores for heap leaching. Ore is considered suitable for the application of this method if it is well "opened" by agitation (bottle) cyanidation with a sufficiently coarse grain size composition of the source material. This method allows to quickly obtain information about the recovery rate, if the deposit contains different types of ores by fractions of different sizes, recovery factors and reagent requirements. The results of analyses of the solid residue dispersed in fractions characterize the residual contents of precious metals, the degree of their extraction for each of them. After obtaining the analysis data, the degree of recovery is calculated by comparing the volumes and contents in the source material, the pregnant solution and the solid residue.