CN203037571U - Atomic absorption spectrophotometer background deduction device - Google Patents
Atomic absorption spectrophotometer background deduction device Download PDFInfo
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- CN203037571U CN203037571U CN 201320012670 CN201320012670U CN203037571U CN 203037571 U CN203037571 U CN 203037571U CN 201320012670 CN201320012670 CN 201320012670 CN 201320012670 U CN201320012670 U CN 201320012670U CN 203037571 U CN203037571 U CN 203037571U
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Abstract
The utility model provides an atomic absorption spectrophotometer background deduction device. A light beam output end of a background correction light source corresponds to a background correction light beam input end of a light beam combiner; a light output end of the light beam combiner is connected with a light input end of a first optical transmission system; a light output end of the first optical transmission system is connected with an input end of an atomizer; an output end of the atomizer is connected with an input end of a second optical transmission system; and an output end of the second optical transmission system is connected with an input end of a monochromator. According to the technical scheme provided by the utility model, full-band background correction can be realized by changing the LED (light-emitting diode) or LD of different output wavelengths of the background correction light source; an atomic absorption spectrophotometer can perform effective background correction in a full-wavelength range; and the technology is simple and easy to realize and favorable for reducing the cost, and improves the performance index of the instrument.
Description
Technical field
The utility model relates to a kind of atomic absorption spectrophotometer (AAS) background deduction device, belongs to the photometer technical field.
Background technology
The background correction device is an important component part of Atomic Absorption Spectrometer device, and its technical parameter directly influences the performance index of instrument.In atomic absorption analysis is measured, background absorption can be regarded as the analytical element atom that records and absorbs all absorption signals in addition (comprising the signal that various molecule absorption, light scattering, coexistence elements spectra overlapping and the absorption of coexistence elements atom etc. produce), be one of major reason that causes the spectrum interference, directly affect measurement result.
In atomic absorption spectroscopy, background correction is finished by twice measurement.For the first time adopt sample light, at the analytical wavelengths place, Measurement and analysis element atom absorption signal and background absorption signal; For the second time adopt reference light, at the analytical wavelengths place, or close position is measured background absorption signal (except individual cases, can only not measure the background absorption signal in the real work, comprise background absorption signal and part of atoms absorption signal herein).Both subtract each other at absorbance, are to have deducted the clean atom absorption signal after the background absorption.
Background correction device commonly used at present is mainly following three kinds: deuterium lamp background correction device, Zeeman effect background correction device and self-absorption background correction device.Deuterium lamp background correction device is to make element lamp and deuterium lamp emission combiner enter monochromator by atomizer and detected by detector by optical combiner, and element light is as sample light, Measurement and analysis element atom absorption signal and background absorption signal; Deuterium lamp light is as reference light, Measurement and analysis element atom absorption signal (part) and background absorption signal.The deuterium lamp method is to use the longest and the widest correcting background method of range of application of time, also is a kind of background correction method of development comparative maturity.Shortcoming is that its background correction available spectrum is mainly in the ultraviolet spectrum district, because deuterium lamp exists〉350nm district luminous energy is low, causes background correction to be difficult to carry out.Matching graceful background correction device is that utilization atomic energy level generation division in magnetic field causes spectral line to divide, and then measures the method for atom absorption and background absorption.Sai Manfa can realize the background correction in the long scope of all-wave, and shortcoming is technical sophistication, cost costliness.Self-absorption background correction device is to utilize hollow cathode lamp is carried out the method that strong and weak pulse power supply carries out background correction.When weak pulse dashes power supply, record atom absorption signal and background absorption signal, the self-priming effect takes place when high power pulse is powered record atom absorption signal (part) and background absorption signal.Its advantage is only just can carry out background correction in all band with element lamp, and shortcoming is that different element generation self absorption effects or self-reversal effect differ greatly, i.e. the sensitivity for analysis of different elements loss is different, and the electric current of high power pulse simultaneously also can shorten the life-span of element lamp.
The utility model content
The purpose of this utility model is in order to solve the problem that above-mentioned prior art exists, i.e. deuterium lamp background correction device since deuterium lamp exist 350nm district luminous energy is low, causes background correction to be difficult to carry out; Zeeman effect background correction device technique complexity, cost costliness; Self-absorption background correction device shortcoming is that different element generation self absorption effects or self-reversal effect differ greatly, i.e. the sensitivity for analysis of different elements loss is different, and the electric current of high power pulse simultaneously also can shorten the life-span of element lamp.And then provide a kind of atomic absorption spectrophotometer (AAS) background deduction device.
The purpose of this utility model is achieved through the following technical solutions:
A kind of atomic absorption spectrophotometer (AAS) background deduction device, comprise: element lamp, the background correction light source, beam combiner, first optical transmission system, atomizer, second optical transmission system, monochromator, photoelectric detector and signal acquiring processing system, the light beam output terminal of described element lamp is corresponding with the element lamp light beam input end of beam combiner, the light beam output terminal of background correction light source is corresponding with the background correction light beam input end of beam combiner, the light output end of beam combiner is connected with the light input end of first optical transmission system, the light output end of first optical transmission system is connected with the input end of atomizer, the output terminal of atomizer is connected with the input end of second optical transmission system, the output terminal of second optical transmission system is connected with the input end of monochromator, the output terminal of monochromator is connected with the input end of photoelectric detector, and the output terminal of photoelectric detector is connected with the signal acquiring processing system input end.
Technique scheme of the present utility model, LED or the LD of the different output wavelengths by changing the background correction light source can realize full wave background correction.The technical scheme that the utility model adopts can make atomic absorption spectrophotometer (AAS) carry out effective background correction in the long scope of all-wave, and this technology simply is easy to realize, is conducive to reduce cost, and improves the performance index of instrument.
Description of drawings
Fig. 1 is the structural representation of atomic absorption spectrophotometer (AAS) background deduction device of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail: present embodiment has provided detailed embodiment being to implement under the prerequisite with technical solutions of the utility model, but protection domain of the present utility model is not limited to following embodiment.
As shown in Figure 1, a kind of atomic absorption spectrophotometer (AAS) background deduction device that present embodiment is related, comprise: element lamp 1, background correction light source 2, beam combiner 3, first optical transmission system 4, atomizer 5, second optical transmission system 6, monochromator 7, photoelectric detector 8 and signal acquiring processing system 9, the light beam output terminal of described element lamp 1 is corresponding with the element lamp light beam input end of beam combiner 3, the light beam output terminal of background correction light source 2 is corresponding with the background correction light beam input end of beam combiner 3, the light output end of beam combiner 3 is connected with the light input end of first optical transmission system 4, the light output end of first optical transmission system 4 is connected with the input end of atomizer 5, the output terminal of atomizer 5 is connected with the input end of second optical transmission system 6, the output terminal of second optical transmission system 6 is connected with the input end of monochromator 7, the output terminal of monochromator 7 is connected with the input end of photoelectric detector 8, and the output terminal of photoelectric detector 8 is connected with signal acquiring processing system 9 input ends.
Described background correction light source 2 is LED or LD light source.
The light beam of element lamp 1 is as sample beam, the light beam of background correction light source 2 is as reference beam, closing Shu Houjing optical transmission system 4 by beam combiner 3 alternately mainly adopts the mode of light source electrical modulation to realize by this process of atomizer 5(), received by photoelectric detector 8 through optical transmission system 6 and monochromator 7 again, last input signal acquisition processing system 9 is handled, finish twice measurement of background correction: be element lamp sample photo measure, Measurement and analysis element atom absorption signal and background absorption signal for the first time; Be LED or LD reference photo measure for the second time, Measurement and analysis element atom absorption signal (part) and background absorption signal, both subtract each other at absorbance, are to have deducted the clean atom absorption signal after the background absorption.
The above; it only is the preferable embodiment of the utility model; these embodiments all are based on the different implementations under the utility model general idea; and protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain of claims.
Claims (2)
1. atomic absorption spectrophotometer (AAS) background deduction device, comprise: element lamp, the background correction light source, beam combiner, first optical transmission system, atomizer, second optical transmission system, monochromator, photoelectric detector and signal acquiring processing system, it is characterized in that, the light beam output terminal of described element lamp is corresponding with the element lamp light beam input end of beam combiner, the light beam output terminal of background correction light source is corresponding with the background correction light beam input end of beam combiner, the light output end of beam combiner is connected with the light input end of first optical transmission system, the light output end of first optical transmission system is connected with the input end of atomizer, the output terminal of atomizer is connected with the input end of second optical transmission system, the output terminal of second optical transmission system is connected with the input end of monochromator, the output terminal of monochromator is connected with the input end of photoelectric detector, and the output terminal of photoelectric detector is connected with the signal acquiring processing system input end.
2. atomic absorption spectrophotometer (AAS) background deduction device according to claim 1 is characterized in that, described background correction light source is LED or LD light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320012670 CN203037571U (en) | 2013-01-10 | 2013-01-10 | Atomic absorption spectrophotometer background deduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320012670 CN203037571U (en) | 2013-01-10 | 2013-01-10 | Atomic absorption spectrophotometer background deduction device |
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| CN203037571U true CN203037571U (en) | 2013-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320012670 Expired - Lifetime CN203037571U (en) | 2013-01-10 | 2013-01-10 | Atomic absorption spectrophotometer background deduction device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697948A (en) * | 2015-04-03 | 2015-06-10 | 李红团 | Coal ash component determination atomic absorption spectrophotometer |
| CN113670817A (en) * | 2021-07-28 | 2021-11-19 | 北京博晖创新生物技术股份有限公司 | Background light beam obtaining method, background deducting method and device |
-
2013
- 2013-01-10 CN CN 201320012670 patent/CN203037571U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104697948A (en) * | 2015-04-03 | 2015-06-10 | 李红团 | Coal ash component determination atomic absorption spectrophotometer |
| CN113670817A (en) * | 2021-07-28 | 2021-11-19 | 北京博晖创新生物技术股份有限公司 | Background light beam obtaining method, background deducting method and device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130703 |