Atomabszorpció

Atomabszorpció, or atomic absorption, is a spectroscopic technique used to determine the concentration of a specific element in a sample. It is based on the principle that atoms in the gaseous state can absorb light at specific wavelengths, which are characteristic of the element. The process involves the following steps:

First, the sample is atomized, typically by heating it to a high temperature in a flame or graphite furnace. This converts the sample into a gaseous state, where the atoms can absorb light. The atomized sample is then exposed to a light source that emits radiation at the characteristic wavelengths of the element of interest.

The light that passes through the atomized sample is measured using a detector. The amount of light absorbed at the characteristic wavelength is proportional to the concentration of the element in the sample. By comparing the absorbed light to a calibration curve, the concentration of the element can be determined.

Atomabszorpció is widely used in analytical chemistry for its high sensitivity and specificity. It is particularly useful for determining the concentration of metals in various samples, such as environmental samples, biological fluids, and industrial materials. The technique is relatively simple and can be automated, making it suitable for routine analysis. However, it requires careful calibration and control of experimental conditions to ensure accurate and precise results.