Atomic fluorescence spectrophotometer (AFS)
Atomic fluorescence is the optical emission of gas particles stimulated to higher energy levels by electromagnetic wave consumption. The major benefit of fluorescence detection over absorbance measures is the higher sensitivity possible due to the very minimal background of the fluorescence signal. To avoid interferences, resonant excitation selectively excites the analytic.
Preparation of Samples:
The sample must be processed, generally with an acid, to break down the substance being examined so that all metal atoms in the specimen may be evaporated. The specimen is placed in a reaction vessel, which is normally filled with an agent that transforms the element to its gas phase. The metal vapors are then carried to the fluorescence cell by an inert gas carrier such as argon. The gas carrier must be inert so that the signal is absorbed and released by the specimen and not by the gas phase.
Atomic Fluorescence Spectroscopy Applications:
Analytical atomic spectroscopic techniques give qualitative and quantitative information about the analysis. This analytical approach is employed in every business, health, and research. Atomic fluorescence spectroscopy consistently delivers precise and trustworthy information about any traces present and their quantity, whether for soil samples, water tests, medical research, or the simple identification of trace elements in rock samples during rock mining.