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Title: Ion-selective electrode in determining fluorine in binary fluorides of metals of groups II-V

The authors have developed a method of determining fluorine by ion-selective electrode techniques in specimens containing mixtures of the fluorides of magnesium and the rare-earth elements (REE), as well as scandium and bismuth. The specimens after treatment at high temperatures are sparingly soluble at room temperature in water and also in aqueous solutions of acids and bases. The authors found that a mixture of KNaCO/sub 3/ and K/sub 2/S/sub 2/O/sub 8/ with a mass ratio of 2:1 was an effective flux for MgF/sub 2/-MeF/sub 3/ specimens, where Me is an REE ion. The combined method of analyzing binary mixtures of fluorides (Mg and REE, Sc and Bi) which provides satisfactory accuracy and reliability in determining the fluoride and two different metals whose compounds may have various ratios in the samples.
Authors:
; ; ; ;
Publication Date:
OSTI Identifier:
5399631
Resource Type:
Journal Article
Resource Relation:
Journal Name: Ind. Lab. (Engl. Transl.); (United States); Journal Volume: 51:7
Research Org:
Bogatskii, Physiochemical Institute, Odessa
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; FLUORIDES; ION SELECTIVE ELECTRODE ANALYSIS; QUANTITATIVE CHEMICAL ANALYSIS; ION-SELECTIVE ELECTRODES; ACCURACY; RARE EARTH COMPOUNDS; BINARY MIXTURES; BISMUTH FLUORIDES; FLUORINE; HEAT TREATMENTS; MAGNESIUM FLUORIDES; POTASSIUM CARBONATES; POTASSIUM SULFATES; SAMPLE PREPARATION; SCANDIUM FLUORIDES; SODIUM CARBONATES; TITRATION; ZIRCONIUM FLUORIDES; ALKALI METAL COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; BISMUTH COMPOUNDS; CARBON COMPOUNDS; CARBONATES; CHEMICAL ANALYSIS; DISPERSIONS; ELECTRODES; ELEMENTS; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; HALOGENS; MAGNESIUM COMPOUNDS; MIXTURES; NONMETALS; OXYGEN COMPOUNDS; POTASSIUM COMPOUNDS; SCANDIUM COMPOUNDS; SODIUM COMPOUNDS; SULFATES; SULFUR COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; ZIRCONIUM COMPOUNDS 400102* -- Chemical & Spectral Procedures