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Rapid analysis method of copper in leachate

A rapid analysis and leachate technology, applied in material analysis by observing the influence of chemical indicators, analysis by chemical reaction of materials, preparation of test samples, etc., can solve the problems of polluted environment and long time, etc. Achieve the effect of reducing contamination, good accuracy and precision, and shortening analysis and measurement time

Inactive Publication Date: 2013-06-26
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It takes a long time to treat the leachate with strong acid and seriously pollutes the environment, so it is not suitable for the analysis and determination of process samples. Therefore, it is necessary to find an oxidant that can treat the leachate quickly and has little environmental pollution. Rapid determination

Method used

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  • Rapid analysis method of copper in leachate
  • Rapid analysis method of copper in leachate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Pipette 5.00mL of leachate into a 250mL Erlenmeyer flask, add 0.5mL of hydrogen peroxide, heat and evaporate to 1-2mL, cool to room temperature, add acetic acid-ammonium acetate buffer solution (pH≈5) dropwise to the solution until the red color no longer deepens and Excess 2mL, then dropwise add saturated ammonium bifluoride solution until the red color disappears and excess 0.5mL, shake well, add 1-2g potassium iodide to the solution, shake well. Quickly titrate with sodium thiosulfate standard solution (f=1.6333mg / mL) to pale yellow. Add 1mL 5g / L starch solution, continue titrating to light blue, add 1mL 400g / L potassium thiocyanate solution, and titrate again until the blue just disappears, which is the end point. Consumption of sodium thiosulfate standard solution 8.99mL, copper ion concentration in the solution is 2.94g / L.

Embodiment 2

[0020] Pipette 5.00mL of leachate into a 250mL Erlenmeyer flask, add 2.0mL of hydrogen peroxide, heat and evaporate to 1-2mL, cool to room temperature, add acetic acid-ammonium acetate buffer solution (pH≈5) dropwise to the solution until the red color no longer deepens and Excess 2mL, then dropwise add saturated ammonium bifluoride solution until the red color disappears and excess 0.5mL, shake well, add 1-2g potassium iodide to the solution, shake well. Quickly titrate with sodium thiosulfate standard solution (f=1.6333mg / mL) to pale yellow. Add 1mL 5g / L starch solution, continue titrating to light blue, add 1mL 400g / L potassium thiocyanate solution, and titrate again until the blue just disappears, which is the end point. Consumption of sodium thiosulfate standard solution 25.75mL, copper ion concentration in the solution is 8.41g / L.

Embodiment 3

[0022] Pipette 5.00mL of leaching solution into a 250mL Erlenmeyer flask, add 3.0mL of hydrogen peroxide, heat and evaporate to 1-2mL, cool to room temperature, add acetic acid-ammonium acetate buffer solution (pH≈5) dropwise to the solution until the red color no longer deepens and Excessive 2mL, then dropwise add saturated ammonium bifluoride solution until the red color disappears and excess (0.5mL), shake well, add 1~2g potassium iodide to the solution, shake well. Quickly titrate with sodium thiosulfate standard solution (f=1.6333mg / mL) to pale yellow. Add 1mL 5g / L starch solution, continue titrating to light blue, add 1mL 400g / L potassium thiocyanate solution, and titrate again until the blue just disappears, which is the end point. Consumption of sodium thiosulfate standard solution 33.40mL, copper ion concentration in the solution is 10.91g / L.

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Abstract

The invention relates to a rapid analysis method of copper in a leachate. The method comprises the following steps: transferring 3-10mL of a leachate to be measured to a triangular flask, adding an oxidant, heating for evaporating to a small volume, cooling to room temperature, and adopting iodometry to determine the concentration of copper ions in the obtained solution, wherein the oxidant preferably selects hydrogen peroxide having a concentration of 30wt%, and the addition amount of the oxidant is 0.5-3.0mL. The addition of a certain amount of hydrogen peroxide to process the leachate in the invention allows a small amount of a strong acid to be used, so the analytic determination time is shortened, and the pollution to the environment is reduced. The method has the advantages of simplicity, rapidness, and easy control and grasping of the operation process, so the method is very suitable for analyzing and determining the flow sample of the leachate, and the obtained result has a good accuracy and a good precision.

Description

technical field [0001] The invention relates to a rapid analysis method for copper in leaching solution, in particular to an analysis method for rapidly determining copper in leaching solution by adding appropriate oxidant to treat the leaching solution and then using iodometric method. Background technique [0002] At present, copper determination methods mainly include iodometric method, spectrophotometry, polarography, atomic absorption spectrometry and so on. For the determination of high concentration copper in leaching solution, the commonly used method is iodometric method. In this analysis method, the leaching solution is processed by adding an appropriate amount of nitric acid and sulfuric acid, heating and evaporating on an electric furnace until white smoke of sulfur trioxide is exhausted. It takes a long time to treat the leachate with strong acid and seriously pollutes the environment, so it is not suitable for the analysis and determination of process samples....

Claims

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Application Information

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IPC IPC(8): G01N21/79G01N1/28
Inventor 周成英屈伟张跃红宋永胜
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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