METHODS AND OBJECTS OF CHEMICAL ANALYSIS ISSN title: "Metody i obʺekty himičeskogo analiza" An international journal devoted to all aspects of Analytical chemistry ISSN 2413-6166 (Online), ISSN 1991-0290 (Print)
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V.A.SHESTAKOV,  I.R.SHELPAKOVA, A.R.TSYGANKOVA, N.I.PETROVA

PHYSICO,CHEMICAL MODELING THE BEHAVIOR OF IMPURITIES UNDER THEIR CONCENTRATION BY DIS,TILLING OFF THE MATRIX OF MOLYBDENUM TRIOXIDE SAMPLE

Physico-chemical modeling of concentration process of impurities by distilling off the sample matrix was applied to the concentration of impurities in MoO3. The modeling allows one to study to what extent the concentration is affected by such factors as the temperature at which distilling off is carried out, the concentration coefficient, the dispersity of a sample and the oxidation level of analytes in the sample. Due to modeling, it turns to be possible to divide impurities into groups by their ability to concentration: impurities practically completely remaining in the concentrate and impurities completely transferring into a gas phase, and impurities partly transferring into a gas phase. The modeling also permits one to understand why a particular impurity falls into this group and to choose ways for preservation of impurities in the concentrate.

Key words: molybdenum trioxiode, concentration, physico,chemical modeling