Method for analyzing and detecting calcium element in ore
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United States of America Patent
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Aug 5, 2014
Grant Date -
Oct 4, 2012
app pub date -
Dec 30, 2009
filing date -
Oct 29, 2009
priority date (Note) -
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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.
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