THE USAGE OF MICROWAVE TECHNIQUE TO DESTROY POTATO SAMPLES IN ORDER TO DETERMINE HEAVY METALS BY ATOMIC ABSORPTION SPECTROFOTOMETRY
Preparation of samples by microwave technique consists of large number of phases, from taking samples till receiving homogeneous solution for instrumental analysis. Samples preparation can include combination of drying, wetting, extraction, digestion, analytic separation and solvent removing. The analysis of content of heavy metals in potato from B...
By M. B. Rajković, I. D. Sredović, S. R. Milojković, D. V. Tošković, D. D. Stanojević
DETERMINATION THE QUALITY OF DRINKING WATER BY INDIRECT METHOD ON SCALE TEST
Investigation of the composition of elements in drinking water, from water network of Belgrade city, with indirect method. This method is based on the scale that is made with precipitation from the water during heating, indicated presence of alkali and alkaline earth elements to a greater extent and heavy metals which is quite expected. Somewhat un...
By M. B. Rajković, Z. Tomić, M. D. Stojanović, A. Đorđević, M. M. Sudar
THE DETERMINATIONS OF TOTAL ACIDS IN RED WINE
The amount of total acids in must is in most number of cases between 5 and 8 g/dm3 . Wines in general possess a little fewer acids than must, by Regulation the least acidity, expressed as tartaric acid is for all kinds of wine 4.5 g/dm3 , because a part of tartaric acids sediments as salt (tartar) in the process of the alcohol fermentation. For win...
By M. B. Rajković, D. D. Stanojević, I. D. Novaković, D. V. Tošković, M. M. Sudar
DETERMINATION OF GERMANIUM, GALLIUM, INDIUM AND THALLIUM DISTRIBUTION IN INTERPRODUCTS OF HYDROMETALLURGICAL ZINC PRODUCTION
Nowadays, due to using many rare metals in the most advanced technologies, the demand for these metals is increasing. Rare metals, however, mostly don’t show the property of creating their own mineral deposits, making their production more complicated. Some rare metals, e.g. gallium, germanium, indium and thallium usually accompany zinc ore. ...
By D. D. Stanojević, M. B. Rajković, D. V. Tošković, M. V. Tomić
A NEW PROCEDURE FOR OBTAINING CALCIUM SULPHATE α-HEMIHYDRATE ON THE BASIS OF WASTE PHOSPHOGYPSUM
Investigations, conducted in this study showed that waste phosphogypsum-dihydrate represents a burden which even must not be kept in deposits because of its large quantity in relation to the main product – phosphoric acid, as well as because of great impact of a phosphogypsum deposit on the environment. By the proposed procedure, calcium-sulp...
By M. B. Rajković, D. V. Tošković, D. D. Stanojević, Č. Lačnjevac