Atomic fluorescence spectrometer based on integrated full-angle excitation source and measurement method
An atomic fluorescence and excitation source technology, applied in the field of analytical instruments, can solve problems such as the influence of instrument measurement sensitivity, and achieve the effects of good measurement precision, lower detection limit, and high radiation intensity
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Embodiment 1
[0031] image 3 It is a schematic structural diagram of the integrated full-angle excitation source used in the present invention, which is composed of an excitation light source module and a ring atomizer module. The excitation light source module is a microwave coaxial resonant cavity, including an outer conductor 1, a microwave input port 2, a microwave antenna 3, an inner conductor 4, an outer gas inlet 5, a middle pipe 6, a middle gas inlet 7, an inner pipe 8, Inner layer gas inlet 9, standard sample tube 10, standard sample inlet 11; outer conductor 1, inner conductor 4, middle tube 6, inner tube 8, standard sample tube 10 are nested and coaxial in order from outside to inside, The inner conductor 4 , the middle tube 6 , the inner tube 8 and the sample tube 10 are flush at the outlet end face, and the inner conductor 4 , the middle tube 6 , the inner tube 8 and the standard sample tube 10 and the outer conductor 1 form a microwave in a nested coaxial structure. Resonant...
Embodiment 2
[0043] Figure 4 It is another structural schematic diagram of the integrated full-angle excitation source used in the present invention, which is composed of an excitation light source module and a ring atomizer module. The excitation light source module is a microwave coaxial resonant cavity, which is the same as the excitation source in Embodiment 1, and will not be repeated here.
[0044] In this embodiment, the annular atomizer is arranged outside the outer conductor 1 of the microwave coaxial resonator above the microwave input port 2, and the guide ring 12 is located outside the outer conductor 1 above the microwave input port 2; the side surface of the guide ring 12 is designed There are a working gas inlet 13, a sample inlet 14 and a shielding gas inlet 15; the inner side of the guide ring 12 is sequentially installed with an inner layer guide pipe 16, a middle layer guide pipe 17 and an outer layer guide pipe 18, and the inner layer guide pipe 18. 16. The middle lay...
Embodiment 3
[0051] Refer to the attached Figure 5 The structure of an atomic fluorescence spectrometer of the present invention is described.
[0052]An atomic fluorescence spectrometer based on an integrated full-angle excitation source of the present invention includes a gas control unit 21 , a sample injection system 22 , a microwave source 23 , an excitation source 24 , a fluorescence detection unit 25 , a data processing unit 26 and a display recording unit 27 . The gas control unit 21 is used to precisely control the flow of each gas. The gas is input from the cylinder, and the gas is precisely controlled to be output to the outer gas inlet 5 of the excitation source 24 through the pressure reducing valve, the pressure regulating valve, the steady flow valve and the flow meter. , the middle gas inlet 7 , the inner gas inlet 9 , the working gas inlet 13 and the shielding gas inlet 15 and the carrier gas required by the pneumatic nebulizers A and B in the sampling system 22 . Using...
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Abstract
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