Improved method for measuring copper in copper concentrate by iodine
A technology of copper concentrate and iodine content, applied in the field of analysis and testing, to improve the operating environment and save reagent costs
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Embodiment 1
[0017] An improved method for measuring copper by iodine measurement of copper concentrates, comprising the following steps: Step 1: according to the copper content of the copper concentrates, weighing 0.2g of copper concentrate samples, drying and grinding, so that the particle size reaches 100 mesh , put it into a Erlenmeyer flask, add 10mL of aqua regia, heat at low temperature for 2min, take it out and cool it slightly, add 5mL of sulfuric acid, heat at low temperature, after the sample is completely dissolved, continue to heat until the white smoke is exhausted, steam until it is nearly dry, take it out and cool;
[0018] Step 2: Add 20mL of water to rinse the cup wall, boil it, take it off and cool it, add ammonium acetate buffer solution until the precipitate disappears, then add 2mL of ammonium bifluoride saturated solution until the red color disappears and the excess is 1mL, add 2g of potassium iodide, shake to dissolve Immediately thereafter, titrate to light yellow ...
Embodiment 2
[0020] An improved method for measuring copper by iodine measurement of copper concentrates, comprising the following steps: Step 1: according to the copper content of copper concentrates, weighing 0.3g of copper concentrate samples, drying and grinding, so that the particle size reaches 150 mesh , put it into a Erlenmeyer flask, add 15mL of aqua regia, heat at low temperature for 3.5min, take it off to cool slightly, add 7.5mL of sulfuric acid, and heat at low temperature. cool down;
[0021] Step 2: Add 35mL of water to rinse the cup wall, boil it, take it off and cool it down, add ammonium acetate buffer solution until the precipitate disappears, then add 3.5mL of saturated ammonium bifluoride solution dropwise until the red color disappears and the excess is 1.5mL, add 3g of potassium iodide, After shaking to dissolve, immediately titrate to light yellow with sodium thiosulfate solution, add 2mL polyvinyl alcohol solution, continue to titrate to red, add 2-5mL potassium th...
Embodiment 3
[0023] An improved method for measuring copper by iodine measurement of copper concentrates, comprising the following steps: Step 1: according to the copper content of copper concentrates, weighing 0.4g of copper concentrate samples, drying and grinding, so that the particle size reaches 200 mesh , put it into a Erlenmeyer flask, add 20mL of aqua regia, heat at low temperature for 5min, take it out and cool it slightly, add 10mL of sulfuric acid, heat at low temperature, after the sample is completely dissolved, continue to heat until the white smoke is exhausted, steam until it is nearly dry, take it out and cool;
[0024] Step 2: Add 50mL water to rinse the cup wall, boil it, take it off and cool it down, add ammonium acetate buffer solution until the precipitate disappears, then add 5mL of ammonium bifluoride saturated solution dropwise until the red color disappears and the excess is 2mL, add 4g of potassium iodide, shake to dissolve Immediately thereafter, titrate to light...
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