atomiabsorptiospektroskopian

Atomic absorption spectroscopy, often abbreviated as AAS, is an analytical technique used to determine the concentration of metallic elements in a sample. It operates on the principle that free atoms in the ground state can absorb electromagnetic radiation at specific wavelengths, which are characteristic of each element. When a sample containing a particular metal is introduced into a flame or graphite furnace, the metal is vaporized and converted into free atoms. Light from a hollow cathode lamp, which emits the specific wavelengths of the element being analyzed, is passed through this atomized sample. If the element is present in the sample, its ground-state atoms will absorb some of this light. The amount of light absorbed is directly proportional to the concentration of the element in the sample. By measuring the absorbance at a specific wavelength and comparing it to a calibration curve generated from known standards, the concentration of the target element in the unknown sample can be determined. AAS is widely used in various fields, including environmental monitoring for heavy metals in water and soil, clinical chemistry for analyzing trace elements in biological samples, and industrial quality control for material analysis. It offers high sensitivity and specificity for many metallic elements.