Current Methods of Sample Preparation Developed for Metal-Containing Recoverable Raw (review)
Methods used for preparation of the samples of different metal-containing secondary raw materials (catalysts, electronic scrap, sludge, etc.) for subsequent analysis in the form of solutions are reviewed: dissolution in a mixture of mineral acids, alloying with various fluxes, leaching et al. Different impacts used to promote sample preparation - elevated temperature and pressure, ultrasound and microwave radiation - are discussed. Methods of sample preparation using sorption concentration for subsequent determination not only noble, but also non-ferrous and rare metals and toxic elements are considered. The stage of sample preparation is shown to be extremely important to diclose the potentiality of the applied analytical methods most completely.