Aluminum Trichloride Extraction-EDTA Volumetric Method for Determination of Calcium Fluoride in Fluorite
The solubility of calcium fluoride in dilute acetic acid is small.The samples were extracted and treated with dilute acetic acid and neutral aluminum trichloride solution successively,and titrated with EDTA solution in sucrose and PH=12 medium.By selecting and controlling the amount of dilute acetic acid,the amount of water used for washing and precipitation,the amount of potassium hydroxide and the precision and recovery of standard addition,the paper draws the conclusion that the method has high precision,high accuracy,simple equipment and strong practicability.
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