komplexometrische

Komplexometrische titration is a type of analytical chemistry technique used to determine the concentration of a metal ion in a solution. The method is based on the formation of a complex compound between the metal ion and a ligand, which is a molecule or ion that can donate a pair of electrons to form a coordinate covalent bond. The ligand used in komplexometrische titration is typically an organic compound with multiple donor atoms, such as ethylenediaminetetraacetic acid (EDTA) or 8-hydroxyquinoline.

The titration process involves adding a solution of the ligand to the sample solution containing the metal ion, while continuously monitoring the pH of the solution. As the ligand is added, it forms a complex with the metal ion, which changes the pH of the solution. The endpoint of the titration is reached when all of the metal ion has been complexed, and the pH of the solution reaches a constant value.

The amount of ligand required to reach the endpoint is proportional to the concentration of the metal ion in the sample solution. By measuring the volume of ligand added and its concentration, the concentration of the metal ion can be calculated using stoichiometry.

Komplexometrische titration is widely used in environmental analysis, clinical chemistry, and industrial quality control to determine the concentration of metal ions such as calcium, magnesium, iron, and copper. The method is rapid, accurate, and can be automated, making it a valuable tool for quantitative analysis.