Is it often influenced by graphite tube replacement in atomic absorption furnace?
Graphite furnace atomic absorption spectrometry (AAS) is a kind of atomizer made of graphite material, such as tube, cup and so on. It is analyzed by atomic absorption spectrometry by current heating atomization. The sensitivity of the analysis has been greatly improved since all the samples participate in atomization and avoid dilution of atomic concentration in flame gas. The method is used for the determination of trace metals and is superior in performance to many other methods and can be used for the analysis of small amounts of samples and for direct analysis of solid samples. Therefore, it has a wide range of applications.
Atomic absorption spectrometer (AAS) is composed of light source, atomization system, spectral system and detection system.The sharp line spectrum of the A light source as the light source requirements analyte emission of sufficient strength, stability, small background, generally using hollow cathode lamp, electrodeless discharge lamp.B atomizer (atomizer) can be divided into pre mixed flame atomizer (premixed flame atomizer), graphite furnace atomizer (graphite furnace atomizer), quartz furnace atomizer (quartz furnace atomizer), cathodic sputtering atomizer (cathode sputtering atomizer).
The instrument from the light source radiation with the measured spectral line of light, when the steam by the steam through the specimen to be measured in the ground state of the atom elements absorbed by the radiation characteristic spectrum of light is reduced the degree of determination of sample analyte. Because of the atomic absorption spectrometer is sensitive, accurate and simple characteristics, has been widely used in metallurgy, mining, geological analysis, petroleum, light industry, agriculture, medicine, health, food and environmental monitoring etc. the major and trace elements.
