METHOD OF DETERMINING WEIGHT CONCENTRATION OF BASIC AND TRACE ELEMENTS IN MATERIALS AND PRODUCTS MADE FROM DYSPROSIUM TITANATE (DyO·TiO), DYSPROSIUM HAFNATE (nDyO·mHfO) AND MIXTURES THEREOF Russian patent published in 2012 - IPC G01N21/27 

FIELD: chemistry.

SUBSTANCE: invention relates to analytical control of chemical composition of material and products made from dysprosium titanate (Dy₂O₃·TiO₂), dysprosium hafnate (nDy₂O₃·mHfO₂) and mixtures thereof. The method of determining weight concentration of basic and trace elements in materials and products containing dysprosium titanate (Dy₂O₃·TiO₂), dysprosium hafnate (nDy₂O₃-mHfO₂) or mixtures thereof through inductively coupled plasma atomic emission spectroscopy involves collecting and decomposing a sample. The method also involves plotting calibration curves for the analysed elements and determining concentration of the analysed elements. The sample is decomposed by fusing with a boron-containing fusing agent, after which the melt is dissolved in aqueous nitric acid solution. Weight concentration of trace elements is determined at sample concentration in the solution of 1000-1300 mg/l, and weight concentration of basic elements is determined at sample concentration in the solution of 0.5-100 mg/l. Before decomposition, the sample is ground to particle size not more than 50 mcm, and fusion is carried out using a fusing agent: sodium tetraborate, lithium tetraborate, lithium metaborate or mixture thereof.

EFFECT: possibility of simultaneous multi-element determination of macro- and micro-components, high accuracy of results of measuring weight concentration of controlled elements in materials and products made from dysprosium titanate, dysprosium hafnate and mixtures thereof using a spectral method for analytical control.

6 cl, 2 tbl