I'm looking for a simple method (spectrophotometric , precipitation....) for routine measurement of copper in wastewater that contains 100 to 1000 mg/l soluble Copper
Hello, Tahar! In my opinion, the following methods are quite well-known and simple to implement:
1) Iodometric titration. This method is based on the reduction of copper (II) with potassium iodide to copper (I); while the released elemental iodine is titrated with sodium thiosulfate in the presence of starch.
Cu2+ + 2KI = CuI + I2 + 2K+
I2 + Na2S2O3 = 2NaI + I2 + 2K++Na2S4O6
2) Photocolorimetry. This method is based on measuring the optical density of a blue solution of copper (II) ammine complex, obtained as a result of the reaction of copper (II) ions with ammonia solution, using the functional dependence of the optical density on the concentration of Cu (II) according to the Beer-Lambert-Bouguer law.
Cu2+ + 4NH4OH = [Cu(NH3)4]2+ + 4H2O
Do you have access to flame AAS or another spectrophotometric technique?
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