Method for digesting calcium fluoride and measuring metal ions in calcium fluoride

By adjusting the ratio of hydrofluoric acid and perchloric acid, calcium fluoride is converted into a fluffy substance, and then added concentrated nitric acid to heat it, the problem of complex, long and incomplete digestion in the existing technology is solved, and the rapid, simple and thorough digestion of calcium fluoride is achieved, and accurate metal ion detection is supported.

CN119666524APending Publication Date: 2025-03-21DO FLUORIDE CHEM CO LTD
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Patent Information

Application Number
CN202411706194.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-26
Publication Date
2025-03-21

AI Technical Summary

Technical Problem

In the prior art, the use of wet digestion method to digest calcium fluoride has complex operation, long time and incomplete operation, and introduces a lot of impurities, which affects the subsequent detection of metal ions in calcium fluoride.

Method used

By adjusting the ratio of hydrofluoric acid and perchloric acid during the digestion process, the calcium fluoride is converted from a solid powder to a fluffy substance, then cooled, and then added concentrated nitric acid to heat it to achieve complete digestion of calcium fluoride.

Benefits of technology

The complete digestion of calcium fluoride is achieved, with fast digestion speed and simple operation, and has no impact on the detection of metal ions in the later stage, and can accurately detect the content of each metal ion.

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Abstract

The invention relates to a method for digesting calcium fluoride and measuring metal ions in calcium fluoride, and belongs to the technical field of digestion treatment methods. The method specifically comprises the following steps: (1) mixing calcium fluoride, hydrofluoric acid and perchloric acid, heating until liquid in a system is completely evaporated to dryness to obtain solid residues, and cooling; (2) adding nitric acid into the solid residues obtained in the step (1), and mixing to obtain transparent liquid; whether the transparent liquid contains insoluble substances or not is observed, and if the transparent liquid does not contain the insoluble substances, digestion is completed; and if insoluble substances are contained, heating is performed until the insoluble substances disappear, and digestion is completed. The method disclosed by the invention can be used for thoroughly digesting calcium fluoride and has the advantages of high digestion speed, simplicity in operation and no influence on later metal ion detection.
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