Method for analyzing and detecting calcium element in ore
US8796032B2 · kind B2 · utility
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3References
7Claims
0Family size
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Key dates
| Filing date | Dec 30, 2009 |
| Grant date | Aug 5, 2014 |
| Priority date | — |
| Expiry date | Dec 19, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for determining the content of calcium element in an ore is provided. It includes: decomposing the ore with hydrochloric acid and nitric acid under heating condition, adding perchloric acid, cooling, adding a small amount of water and boiling the solution to dissolve the salts, then cooling, diluting to the constant volume, filtering into a dry beaker with dry filter-paper, masking interfering ions with triethanolamine, adjusting the pH value of the solution with KOH, using calcein-thymolphthalein as indicator, and determinating the content of calcium with EDTA titrimetry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.