The Hanus method, named after Dr. S. Hanus, is a technique used in analytical chemistry to determine the concentration or amount of a substance in a solution. This method involves the process of precipitation, followed by the measurement of an indicator to determine the concentration of the desired substance.
In the Hanus method, a solution containing the substance of interest is first treated with a reagent that precipitates the desired substance as a solid. This precipitate is then filtered, washed, and dissolved in a known volume of a suitable solvent.
Next, an indicator solution is added to the dissolved precipitate, which causes a color change in the solution. The intensity of this color change is proportional to the concentration of the desired substance in the sample.
To determine the concentration of the substance, a portion of the colored solution is transferred into a cuvette and inserted into a spectrophotometer. The spectrophotometer measures the absorbance of the solution at a specific wavelength, which provides a quantitative measurement of the concentration of the substance.
The Hanus method is commonly used in many fields of chemistry, including environmental analysis, pharmaceutical analysis, and food analysis. Its accuracy and reliability make it a trusted technique for determining the concentration of various substances in different types of samples.
