Atomic fluorescence analyzers are divided into non-dispersive atomic fluorescence analyzers and disperse atomic fluorescence analyzers. The structures of these two types of instruments are basically similar, and the difference lies in the monochromator part, i. H. whether the generated fluorescence should be split.
Operating principle of the atomic fluorescence photometer
Reducing the elements to be analyzed in the sample solution to volatile covalent gaseous hydrides (or atomic vapors) and then using a carrier gas introduced into the nebulizer and atomized to ground state atoms in the argon-hydrogen flame.
The atoms in the ground state absorb the energy of the light source and go into an excited state. During the deactivation process, the excited-state atoms give off the absorbed energy in the form of fluorescence. The strength of the fluorescence signal depends on the sample. The salary of Aanalyte elements in the sample has a linear relationship, so the content of the analyte element in the sample can be determined by measuring the fluorescence intensity.
High-precision automatic atomizer height adjustment device
Designed atomizer height Automatic adjustment device adopts man-machine -Dialogue to automatically control the height adjustment of the atomizer, which is more convenient and faster, ensures the stability of the instrument, and improves the sensitivity of the instrument.
High-efficiency shielded quartz furnace nebulizer
The special double-layer quartz furnace core effectively reduces the occurrence of fluorescence quenching and improves the precision of the instrument.
Convenient hollow cathode lamp fixture
The developed hollow cathode lamp fixture does not require manual adjustment of the directional angle dhe lamp is the hollow cathode lamp. Installation, fixing and replacement are easier and more convenient. In addition, the fully covered black mounting sleeve prevents scattering of the excitation light source.
Advantages of Atomic Fluorescence Photometer
Non-dispersive system, short optical path, less energy loss
Simple structure, low failure rate
High sensitivity, low detection limit, proportional to the intensity of the excitation light source
Reception of multiple fluorescence lines
Suitable for multi-element analysis
Use blind tube detector to reduce flame noise
Wide linear range, 3 orders of magnitude
High nebulization efficiency, theoretically up to 100%
No matrix interference
Can perform valence analysis
UseArgon-hydrogen flame, high UV transmission, low background interference