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Optical system with pulse xenon lamp used for atomic absorption background correcting

A pulsed xenon lamp and optical system technology, applied in the field of atomic absorption spectroscopy, can solve the problems of long warm-up time, complicated power supply, long thermal balance time, etc., and achieve the effect of improving accuracy

Active Publication Date: 2015-02-25
涿州迅利达创新科技发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The wavelength range is short: only 190-340nm. When using a deuterium lamp as a background correction light source, it is very difficult to analyze the background correction of elements with a wavelength greater than 340nm, such as: Cr (the analysis line wavelength is 357.9nm) Ca (the analysis line wavelength is 422.7nm ) such common elements still have serious background absorption when the sample is complex, and the deuterium lamp cannot perform background correction at this time
[0004] 2. High power consumption and severe heat generation: the deuterium lamp generally used for atomic absorption is 30W
Long time for instrument to reach thermal equilibrium
[0005] 3. The power supply is complex, usually the deuterium lamp needs 3 sets of power supply: filament power supply, starter power supply, working power supply
[0006] 4. It takes a long time to warm up. Generally, the deuterium lamp needs to be warmed up for 30 minutes before it can be put into use.
[0007] 5. Short life, the usual deuterium lamp life is 500 hours, good deuterium lamp life is 2000 hours

Method used

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  • Optical system with pulse xenon lamp used for atomic absorption background correcting
  • Optical system with pulse xenon lamp used for atomic absorption background correcting
  • Optical system with pulse xenon lamp used for atomic absorption background correcting

Examples

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example 1

[0026] see figure 1 , which shows the schematic diagram of the atomic absorption background correction optical system provided in this example. It can be seen from the figure that the optical system uses a pulsed xenon lamp as the atomic absorption background correction light source. For this reason, the optical system mainly includes: pulse xenon lamp A, hollow cathode lamp B, half mirror C, atomizer D, rotating color filter group E, spectroscopic system F, photomultiplier tube G, preamplifier H, pulse Xenon lamp power supply I, hollow cathode lamp power supply J, control system K, first lens L1 and second lens L2.

[0027] Pulse xenon lamp A, which is used as a light source for atomic absorption background correction. The pulsed xenon lamp is powered by the pulsed xenon lamp power supply I controlled by the control system K, and the corresponding current, frequency and phase are controlled by the control system K. The output light of the pulsed xenon lamp is transmitted to...

example 2

[0052] see image 3 , which shows the schematic diagram of the atomic absorption background correction optical system provided in this example. It can be seen from the figure that the optical system also uses a pulsed xenon lamp as the atomic absorption background correction light source, and the optical system mainly includes: a pulsed xenon lamp A, a hollow cathode lamp B. Atomizer D, rotating color filter group E, spectroscopic system F, photomultiplier tube G, preamplifier H, pulse xenon lamp power supply I, hollow cathode lamp power supply J, control system K, first lens L1, second lens L2 and the third lens L3.

[0053] The solution provided in this example is basically the same as that in Example 1, except that:

[0054] In this example, the half-mirror C is not used, and the pulsed xenon lamp A is directly placed in the entire optical circuit through the third lens L3.

[0055] Specifically, the output end of the hollow cathode lamp B cooperates with the input end of...

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Abstract

The invention discloses an optical system with a pulse xenon lamp used for atomic absorption background correcting. The pulse xenon lamp and a hollow cathode lamp in the system are controlled by a pulse xenon lamp power supply and a hollow cathode lamp power supply of a control system respectively, and power supplying is carried out by the pulse xenon lamp power supply and the hollow cathode lamp power supply. The pulse xenon lamp and the hollow cathode lamp are matched to form a combined beam which enters an atomizer through a first lens and is output through the atomizer, then the combined beam enters a rotating color filtering lens group through a second lens and is output into a beam splitting system through the rotating color filtering lens group, and the light beam is output through the beam splitting system and then enters the control system through a photomultiplier and a pre-amplifier in sequence. The pulse xenon lamp is used as an atomic absorption background correcting light source, the shortcoming of a deuterium lamp which is used as the atomic absorption background correcting light source in the prior art is effectively overcome, and meanwhile the color filtering lens group which is matched for use greatly improves the accuracy of background correcting.

Description

technical field [0001] The invention relates to the technical field of atomic absorption spectroscopy, in particular to the atomic absorption background correction technology. Background technique [0002] Continuous light source background correction is one of the main methods of background correction in atomic absorption spectrometry, and it is also the most classic background correction method. Since 1962, the deuterium lamp has been used as the light source for atomic absorption background correction, and its advantage is that the ultraviolet light is strong and stable. weakness is: [0003] 1. Short wavelength range: only 190-340nm, when using a deuterium lamp as a background correction light source, it is very difficult to analyze the background correction of elements with a wavelength greater than 340nm, for example: Cr (the analysis line wavelength is 357.9nm) Ca (the analysis line wavelength is 422.7nm ) Such common elements still have serious background absorptio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/10
Inventor 杨啸涛陈建钢中山强刘波刘志高
Owner 涿州迅利达创新科技发展有限公司
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