CN108709864A - A kind of multi-functional atomic spectrometer - Google Patents
A kind of multi-functional atomic spectrometer Download PDFInfo
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- CN108709864A CN108709864A CN201810745639.0A CN201810745639A CN108709864A CN 108709864 A CN108709864 A CN 108709864A CN 201810745639 A CN201810745639 A CN 201810745639A CN 108709864 A CN108709864 A CN 108709864A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/3103—Atomic absorption analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6402—Atomic fluorescence; Laser induced fluorescence
- G01N21/6404—Atomic fluorescence
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- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The present invention provides a kind of multi-functional atomic spectrometers, belong to atomic spectrograph technical field.The optical circuit path one is made of Atomic absorption light source system, former suction outside optical system one, sampling Graphite Furnace Atomic system, former suction outside optical system two, flame atomizer system, combination outside optical system, monochromator beam splitting system, former suction detecting system and signal processing and control system；Optical circuit path two is made of atomic fluorescence light-source system, fluorescence input path system, atomic fluorescence atomization system, fluorescence reception light path system, atomic fluorescence detecting system, combination outside optical system, monochromator beam splitting system, former suction detecting system and signal processing and control system.The multi-functional atomic spectrometer of the present invention is integrally designed technology using Flame Atomic Absorption Spectrometry, sampling Graphite Furnace Atomic Absorption, hydride atomic absorption and atomic fluorescence, the analysis test function of analysis test function and atomic fluorescence spectrophotometer with atomic absorption spectrophotometer, realizes a tractor serves several purposes.
Description
Technical field
The present invention relates to a kind of multi-functional atomic spectrometers, belong to atomic spectrograph technical field.
Background technology
Atomic absorption spectrophotometer is that the characteristic spectral line sent out by element lamp to be measured is generated by test sample through atomization
Atomic vapour when, absorbed by the ground state atom of element to be measured in steam, by measure radiant light remitted its fury degree, ask
Go out the content of element to be measured in test sample.Atomic fluorescence spectrophotometer is that the ground state atom based on element to be measured in steam phase absorbs certain
A little wavelength radiations undetermined, become excited atom, the atom that excited atom launches certain wavelength during deexcitation is glimmering
Light, a kind of analytical instrument that the constituent content in sample is analyzed by measuring its intensity.
There are three types of the common detection method of atomic absorption spectrum is usual：Flame Atomic Absorption Spectrometry, sampling Graphite Furnace Atomic Absorption and hydrogen
Compound Atomic absorption can detect most metals element, but certain elements such as Hg, As, Se, Sb, Bi etc. use atomic fluorescence
Method detection result is good, and therefore, when carrying out elemental analysis of samples now, laboratory has two kinds of spectrum of Atomic absorption and atomic fluorescence
Instrument carries out different method analyses, so that equipment purchase cost increases, it is cumbersome, increase testing cost.
Invention content
The purpose of the present invention is to solve the above-mentioned problems of the prior art, and then provide a kind of multi-functional atomic light
Spectrometer.
The purpose of the present invention is what is be achieved through the following technical solutions：
A kind of multi-functional atomic spectrometer is made of optical circuit path one, optical circuit path two and deuterium lamp continuous light source；
The optical circuit path one is by Atomic absorption light source system, former suction outside optical system one, sampling Graphite Furnace Atomic system, original
Inhale outside optical system two, flame atomizer system, combination outside optical system, monochromator beam splitting system, it is former inhale detecting system and
Signal processing is formed with control system；The light source of Atomic absorption light source system sends out element resonance line to be measured, is inhaled by original outer
Light path system one focuses or sampling Graphite Furnace Atomic system is arrived in light splitting, then inhales outside optical system two by former, focuses or light splitting is arrived
Flame atomizer system using the light splitting of combination outside optical system or focuses, monochromator beam splitting system is entered, by monochrome
Device beam splitting system is divided, and the former standard for inhaling detecting system, signal processing and control system to known element to be measured is entered
Solution is compared the absorption of light with test specimens the absorption of resonance line, to the amplification of acquisition signal and data conversion
Reason finally finds out the content of element to be measured in sample to be tested；
Or optical circuit path one is by Atomic absorption light source system, former suction outside optical system one, flame atomizer system, group
It closes outside optical system, monochromator beam splitting system, former suction detecting system and signal processing and control system forms；Atomic absorption light source
The light source of system sends out element resonance line to be measured, inhales the focusing of outside optical system one by original or flame atomizer system is arrived in light splitting
System using the light splitting of combination outside optical system or focuses；
Or optical circuit path one is by Atomic absorption light source system, former suction outside optical system one, sampling Graphite Furnace Atomic system, group
It closes outside optical system, monochromator beam splitting system, former suction detecting system and signal processing and control system forms；Atomic absorption light source
The light source of system sends out element resonance line to be measured, inhales the focusing of outside optical system one by original or sampling Graphite Furnace Atomic system is arrived in light splitting
System using the light splitting of combination outside optical system or focuses；
Or optical circuit path one is by Atomic absorption light source system, former suction outside optical system one, sampling Graphite Furnace Atomic system, fire
Flame atomizer system, combination outside optical system, monochromator beam splitting system, former suction detecting system and signal processing and control system
Composition；The light source of Atomic absorption light source system sends out element resonance line to be measured, inhales the focusing of outside optical system one by original or divides
Light, then to sampling Graphite Furnace Atomic system and flame atomizer system in parallel, using the light splitting of combination outside optical system or gather
It is burnt；
Or optical circuit path one is by Atomic absorption light source system, former suction outside optical system one, flame atomizer system, hydrogen
Compound atomizer system, combination outside optical system, monochromator beam splitting system, former detecting system and the signal processing inhaled are with control
System composition；The light source of Atomic absorption light source system sends out element resonance line to be measured, by original inhale outside optical system one focus or
Light splitting, then to hydride atomization device system and flame atomizer system in parallel, using combination outside optical system light splitting
Or it focuses；
Or optical circuit path one is by Atomic absorption light source system, former suction outside optical system one, sampling Graphite Furnace Atomic system, fire
Flame atomizer system, hydride atomization device system, combination outside optical system, monochromator beam splitting system, former suction detecting system
It is formed with signal processing and control system；The light source of Atomic absorption light source system sends out element resonance line to be measured, is inhaled by original
Outside optical system one focuses or light splitting, then hydride atomization device system, flame atomizer system and graphite furnace to parallel connection
Atomization system using the light splitting of combination outside optical system or focuses；
The deuterium lamp continuous light source inhales outside optical system one with original and is connected；
The optical circuit path two by atomic fluorescence light-source system, fluorescence input path system, atomic fluorescence atomization system,
Fluorescence reception light path system, atomic fluorescence detecting system, combination outside optical system, monochromator beam splitting system, former suction detecting system
It is formed with signal processing and control system；The hollow cathode lamp of atomic fluorescence light-source system enters as excitation light source by fluorescence
It converges at the center of atomic fluorescence atomization system after penetrating light path system, in the direction vertical with excitation light source, is excited
Fluorescence signal enters atomic fluorescence detecting system by fluorescence reception light path system, and the part light that excitation light source is sent out is as reference
Signal enters monochromator beam splitting system, is divided by monochromator beam splitting system, entered by combining outside optical system
Detecting system is inhaled to original, chronologically selecting sequence respectively enters detecting system to reference signal with atomic fluorescence signal, the ginseng surveyed
It is fed back after processing than signal in fluorescence signal measurement result, carries out Data correction, by signal processing and control system to inspection
Device acquisition signal amplification and data conversion treatment are surveyed, the content of element to be measured in sample to be tested is finally found out.
The multi-functional atomic spectrometer of the present invention is inhaled using Flame Atomic Absorption Spectrometry, sampling Graphite Furnace Atomic Absorption, hydride atoms
It receives and is integrally designed technology with atomic fluorescence, analysis test function and atomic fluorescence spectrophotometer with atomic absorption spectrophotometer
Analysis test function, realize a tractor serves several purposes.The multi-functional atomic spectrometer of the present invention is easy to operate, reduces adopting for equipment
Purchase cost and testing cost.
Description of the drawings
Fig. 1~Fig. 6 is the structural schematic diagram of multi-functional atomic spectrometer of the present invention.
Reference numeral in figure, 1 is Atomic absorption light source system, and 2 inhale outside optical system one to be former, and 3 be sampling Graphite Furnace Atomic
Change system, 4 inhale outside optical system two to be former, and 5 be flame atomizer system, and 6 be atomic fluorescence light-source system, and 7 enter for fluorescence
Penetrate light path system, 8 be atomic fluorescence atomization system, and 9 be fluorescence reception light path system, and 10 be atomic fluorescence detecting system, 11
To combine outside optical system, 12 be monochromator beam splitting system, and 13 inhale detecting system to be former, and 14 be signal processing and control system,
15 be deuterium lamp continuous light source, and 16 be hydride atomization device system.
Specific implementation mode
Below in conjunction with attached drawing, the present invention is described in further detail：The present embodiment is being with technical solution of the present invention
Under the premise of implemented, give detailed embodiment, but protection scope of the present invention is not limited to following embodiments.
As shown in Fig. 1~Fig. 6, a kind of multi-functional atomic spectrometer involved by the present embodiment, by optical circuit path one, light path
Path two and deuterium lamp continuous light source 15 form；
The optical circuit path one is by Atomic absorption light source system 1, former suction outside optical system 1, sampling Graphite Furnace Atomic system
3, former to inhale outside optical system 24, flame atomizer system 5, combination outside optical system 11, monochromator beam splitting system 12, former suction
Detecting system 13 and signal processing are formed with control system 14；The light source of Atomic absorption light source system 1 sends out element resonance to be measured
Spectral line is inhaled outside optical system 1 by original and is focused or be divided to sampling Graphite Furnace Atomic system 3, then inhales outer light path system by former
It unites 24, focuses or flame atomizer system 5 is arrived in light splitting, using the light splitting of combination outside optical system 11 or focus, enter list
Color device beam splitting system 12, is divided by monochromator beam splitting system 12, enters former suction detecting system 13, signal processing and control
System 14 processed is compared the absorption of light with test specimens the absorption of resonance line the standard solution of known element to be measured, passes through
To the amplification of acquisition signal and data conversion treatment, finally find out the content of element to be measured in sample to be tested (shown in Fig. 1)；
Or optical circuit path one is by Atomic absorption light source system 1, former suction outside optical system 1, flame atomizer system
5, outside optical system 11, monochromator beam splitting system 12, former suction detecting system 13 and signal processing are combined and control system 14 forms；
The light source of Atomic absorption light source system 1 sends out element resonance line to be measured, inhales the focusing of outside optical system 1 by original or light splitting is arrived
Flame atomizer system 5 using the light splitting of combination outside optical system 11 or focuses (shown in Fig. 2)；
Or optical circuit path one is by Atomic absorption light source system 1, former suction outside optical system 1, sampling Graphite Furnace Atomic system
3, outside optical system 11, monochromator beam splitting system 12, former suction detecting system 13 and signal processing are combined and control system 14 forms；
The light source of Atomic absorption light source system 1 sends out element resonance line to be measured, inhales the focusing of outside optical system 1 by original or light splitting is arrived
Sampling Graphite Furnace Atomic system 3 using the light splitting of combination outside optical system 11 or focuses (shown in Fig. 3)；
Or optical circuit path one is by Atomic absorption light source system 1, former suction outside optical system 1, sampling Graphite Furnace Atomic system
3, at flame atomizer system 5, combination outside optical system 11, monochromator beam splitting system 12, former suction detecting system 13 and signal
Reason is formed with control system 14；The light source of Atomic absorption light source system 1 sends out element resonance line to be measured, inhales outer light path by original
System 1 focuses or light splitting, then to sampling Graphite Furnace Atomic system 3 and flame atomizer system 5 in parallel, outer using combination
Light path system 11 is divided or focuses (shown in Fig. 4)；
Or optical circuit path one is by Atomic absorption light source system 1, former suction outside optical system 1, flame atomizer system
5, hydride atomization device system 16, combination outside optical system 11, monochromator beam splitting system 12, former suction detecting system 13 and signal
Processing is formed with control system 14；The light source of Atomic absorption light source system 1 sends out element resonance line to be measured, inhales outer light by original
Road system 1 focuses or light splitting, then arrives hydride atomization device system 16 in parallel and flame atomizer system 5, using
It combines the light splitting of outside optical system 11 or focuses (shown in Fig. 5)；
Or optical circuit path one is by Atomic absorption light source system 1, former suction outside optical system 1, sampling Graphite Furnace Atomic system
3, flame atomizer system 5, hydride atomization device system 16, combination outside optical system 11, monochromator beam splitting system 12, original
Detecting system 13 and signal processing is inhaled to form with control system 14；It is total that the light source of Atomic absorption light source system 1 sends out element to be measured
Shake spectral line, and inhaling outside optical system 1 by original focuses or be divided, then former to hydride atomization device system 16 in parallel, flame
Sonization device system 5 and sampling Graphite Furnace Atomic system 3 using the light splitting of combination outside optical system 11 or focus (shown in Fig. 6)；
The deuterium lamp continuous light source 15 inhales outside optical system 1 with original and is connected (shown in Fig. 1~Fig. 6)；
The optical circuit path two is by atomic fluorescence light-source system 6, fluorescence input path system 7, atomic fluorescence atomization system
System 8, fluorescence reception light path system 9, atomic fluorescence detecting system 10, combination outside optical system 11, monochromator beam splitting system 12, original
Detecting system 13 and signal processing is inhaled to form with control system 14；The hollow cathode lamp of atomic fluorescence light-source system 6 is as excitation
Light source is converged at after fluorescence input path system 7 at the center of atomic fluorescence atomization system 8, is hung down with excitation light source
Straight direction (or angled with light source), excited fluorescence signal are glimmering into atom by fluorescence reception light path system 9
Optical detection system 10, the part light that excitation light source is sent out enter list as reference signal by combining outside optical system 11
Color device beam splitting system 12, is divided by monochromator beam splitting system 12, enters former suction detecting system 13, reference signal and original
Chronologically selecting sequence respectively enters detecting system to sub- fluorescence signal, and the reference signal surveyed is fed back after processing in fluorescence signal
Measurement result carries out Data correction, and signal amplification and data conversion are acquired to detector by signal processing and control system 14
Processing finally finds out the content of element to be measured in sample to be tested (shown in Fig. 1).
The Atomic absorption light source system 1 is hollow cathode lamp, electrodeless discharge lamp, cathodic sputtering light source, laser light source, height
Performance hollow cathode lamp, xenon lamp, deuterium lamp or electric spark or arc source.Atomic absorption light source system 1 is using index glass formula eight
Lamp position Huan Deng mechanisms, element lamp are fixed on according to certain rule in instrument Huan Deng mechanisms, are replaced and are rotated or move when measuring element
Dynamic light source switching mirror is realized.
The former suction outside optical system 1 or former outside optical system 24 of inhaling are made of lens, condenser and toroidal mirror.
The function of the sampling Graphite Furnace Atomic system 3 is so that sample to be tested is become atomic vapour using the thermal energy of electric energy production
Atomization system, can be Transverse Heated graphite furnace atomizer or longitudinal heating graphite furnace atomizer.
The function of the flame atomizer system 5, which is the thermal energy generated using chemical flame, makes sample to be tested become atom
The flame atomization system of steam, combustion gas can be acetylene, propane, liquefied petroleum gas, hydrogen, and combustion-supporting gas can be air, oxidation
Argon nitrogen, oxygen etc..Burner can be premixing combuster or full consumption type burner.
The atomic fluorescence light-source system 6 is that high performance hollow cathode lamp, hollow cathode lamp, electrodeless discharge lamp, cathode splash
Penetrate light source, laser light source, electric spark or arc source.Atomic fluorescence light-source system 6 is using dynamic four lamp position Huan Deng mechanisms of lamp-based, member
Plain lamp is fixed on around circular lamp panel, and lamp panel is by step motor control.
The atomic fluorescence atomization system 8 uses protected type quartz stove low temperature atomization system.
The atomic fluorescence detecting system 10 is made of control circuit and photoelectric detector, and photoelectric detector is photoelectricity
Multiplier tube and solid-state detector.
Monochromator beam splitting system 12 is made of entrance slit, collimating mirror, dispersion element and exit slit, and effect is will to wait for
The Absorption Line and neighbouring spectral line for surveying element separate, that is, isolate required resonance line.Dispersion element can be plane grating, recessed
Concave grating or echelle grating.
The former detecting system 13 of inhaling is made of control circuit and photoelectric detector, and photoelectric detector can be photoelectricity times
Increase pipe or solid-state detector.
The signal processing includes the amplification of acquisition signal and data conversion treatment circuit, flow path control electricity with control system 14
Road and gas circuit control circuit.
The foregoing is only a preferred embodiment of the present invention, these specific implementation modes are all based on the present invention
Different realization methods under general idea, and scope of protection of the present invention is not limited thereto, it is any to be familiar with the art
Technical staff in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in, should all cover the present invention
Within protection domain.Therefore, the scope of protection of the invention shall be subject to the scope of protection specified in the patent claim.
Claims (10)
1. a kind of multi-functional atomic spectrometer is made of optical circuit path one, optical circuit path two and deuterium lamp continuous light source, feature exists
In,
The optical circuit path one is outer by Atomic absorption light source system, former suction outside optical system one, sampling Graphite Furnace Atomic system, former suction
Light path system two, flame atomizer system, combination outside optical system, monochromator beam splitting system, former suction detecting system and signal
Processing is formed with control system；The light source of Atomic absorption light source system sends out element resonance line to be measured, inhales outer light path by original
System one focuses or sampling Graphite Furnace Atomic system is arrived in light splitting, then inhales outside optical system two by former, focuses or flame is arrived in light splitting
Atomizer system using the light splitting of combination outside optical system or focuses, enters monochromator beam splitting system, by monochromator point
Photosystem is divided, and the former standard solution for inhaling detecting system, signal processing and control system to known element to be measured is entered
The absorption of resonance line is compared the absorption of light with test specimens, by acquisition signal amplification and data conversion treatment, most
The content of element to be measured in sample to be tested is found out eventually；
Or optical circuit path one is outer by Atomic absorption light source system, former suction outside optical system one, flame atomizer system, combination
Light path system, monochromator beam splitting system, former suction detecting system and signal processing and control system form；Atomic absorption light source system
Light source send out element resonance line to be measured, by original inhale outside optical system one focus or light splitting arrive flame atomizer system,
Using the light splitting of combination outside optical system or focus；
Or optical circuit path one is outer by Atomic absorption light source system, former suction outside optical system one, sampling Graphite Furnace Atomic system, combination
Light path system, monochromator beam splitting system, former suction detecting system and signal processing and control system form；Atomic absorption light source system
Light source send out element resonance line to be measured, by original inhale outside optical system one focus or light splitting arrive sampling Graphite Furnace Atomic system,
Using the light splitting of combination outside optical system or focus；
Or optical circuit path one is former by Atomic absorption light source system, former suction outside optical system one, sampling Graphite Furnace Atomic system, flame
Sonization device system, combination outside optical system, monochromator beam splitting system, former suction detecting system and signal processing and control system group
At；The light source of Atomic absorption light source system sends out element resonance line to be measured, and inhaling outside optical system one by original focuses or be divided,
Sampling Graphite Furnace Atomic system in parallel and flame atomizer system are arrived again, using the light splitting of combination outside optical system or are focused；
Or optical circuit path one is by Atomic absorption light source system, former suction outside optical system one, flame atomizer system, hydride
Atomizer system, combination outside optical system, monochromator beam splitting system, former suction detecting system and signal processing and control system group
At；The light source of Atomic absorption light source system sends out element resonance line to be measured, and inhaling outside optical system one by original focuses or be divided,
Hydride atomization device system in parallel and flame atomizer system are arrived again, using the light splitting of combination outside optical system or are gathered
It is burnt；
Or optical circuit path one is former by Atomic absorption light source system, former suction outside optical system one, sampling Graphite Furnace Atomic system, flame
Sonization device system, hydride atomization device system, combination outside optical system, monochromator beam splitting system, former suction detecting system and letter
Number processing with control system form；The light source of Atomic absorption light source system sends out element resonance line to be measured, inhales outer light by original
Road system one focuses or light splitting, then hydride atomization device system, flame atomizer system and sampling Graphite Furnace Atomic to parallel connection
Change system using the light splitting of combination outside optical system or focuses；
The deuterium lamp continuous light source inhales outside optical system one with original and is connected；
The optical circuit path two is by atomic fluorescence light-source system, fluorescence input path system, atomic fluorescence atomization system, fluorescence
Receiving light path system, atomic fluorescence detecting system, combination outside optical system, monochromator beam splitting system, former suction detecting system and letter
Number processing with control system form；The hollow cathode lamp of atomic fluorescence light-source system is as excitation light source, by fluorescence incident light
It is converged at after the system of road at the center of atomic fluorescence atomization system, in the direction vertical with excitation light source, excited fluorescence
Signal enters atomic fluorescence detecting system by fluorescence reception light path system, and the part light that excitation light source is sent out is believed as reference
Number, by combining outside optical system, monochromator beam splitting system is entered, is divided, is entered by monochromator beam splitting system
Original inhales detecting system, and chronologically selecting sequence respectively enters detecting system to reference signal with atomic fluorescence signal, the reference surveyed
Signal is fed back after processing in fluorescence signal measurement result, carries out Data correction, by signal processing and control system to detection
Device acquires signal amplification and data conversion treatment, finally finds out the content of element to be measured in sample to be tested.
2. multi-functional atomic spectrometer according to claim 1, which is characterized in that the Atomic absorption light source system is empty
Heart cathode modulation, electrodeless discharge lamp, cathodic sputtering light source, laser light source, high performance hollow cathode lamp, xenon lamp, deuterium lamp, electric spark or
Arc source.
3. multi-functional atomic spectrometer according to claim 1, which is characterized in that the former suction outside optical system one or original
Outside optical system two is inhaled to be made of lens, condenser and toroidal mirror.
4. multi-functional atomic spectrometer according to claim 1, which is characterized in that the sampling Graphite Furnace Atomic system is cross
To heating graphite furnace atomizer or longitudinal heating graphite furnace atomizer.
5. multi-functional atomic spectrometer according to claim 1, which is characterized in that the atomic fluorescence light-source system is high
Performance hollow cathode lamp, hollow cathode lamp, electrodeless discharge lamp, cathodic sputtering light source, laser light source, electric spark or arc source.
6. multi-functional atomic spectrometer according to claim 1, which is characterized in that the atomic fluorescence atomization system
Using protected type quartz stove low temperature atomization system.
7. multi-functional atomic spectrometer according to claim 1, which is characterized in that the atomic fluorescence detecting system is
It is made of control circuit and photoelectric detector, photoelectric detector is photomultiplier and solid-state detector.
8. multi-functional atomic spectrometer according to claim 1, which is characterized in that monochromator beam splitting system is by incident narrow
Seam, collimating mirror, dispersion element and exit slit are constituted.
9. multi-functional atomic spectrometer according to claim 1, which is characterized in that the former detecting system of inhaling is by controlling
Circuit and photoelectric detector composition, photoelectric detector is photomultiplier or solid-state detector.
10. multi-functional atomic spectrometer according to claim 1, which is characterized in that the signal processing and control system
Including the amplification of acquisition signal and data conversion treatment circuit, flow path control circuit and gas circuit control circuit.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114324280A (en) * | 2021-12-30 | 2022-04-12 | 辽宁华一检测认证中心有限公司 | Atomic fluorescence spectrometer for detecting selenium content of food |
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