Patent Number: 8,796,032

Title: Method for analyzing and detecting calcium element in ore

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.

Inventors: Liang; Yulan (Jiangxi, CN), Peng; Ling (Jiangxi, CN), Zhao; Zhijian (Jiangxi, CN)

Assignee: Jiangxi Rare Earth and Rare Metals Tungsten Group Holding Co Ltd.

International Classification: G01N 33/24 (20060101); G01N 33/20 (20060101); G01N 21/79 (20060101); G01N 31/16 (20060101)

Expiration Date: 8/05/12018