CN103822908A - Fluorescence, Raman and laser induced atomic emission spectroscopy combined system - Google Patents
Fluorescence, Raman and laser induced atomic emission spectroscopy combined system Download PDFInfo
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- CN103822908A CN103822908A CN201410067077.0A CN201410067077A CN103822908A CN 103822908 A CN103822908 A CN 103822908A CN 201410067077 A CN201410067077 A CN 201410067077A CN 103822908 A CN103822908 A CN 103822908A
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Abstract
The invention discloses a fluorescence, Raman and laser induced atomic emission spectroscopy combined system, comprising a light source module, an optical path module and a detection module (3). Corresponding detection modes can be switched according to different detection demands through integration of fluorescence, Raman and laser induced atomic emission spectroscopic analysis into a same system, thereby realizing combined usage of fluorescence, Raman and laser induced atomic emission spectroscopic analysis in a same instrument platform. The combined system provided by the invention substantially lowers down demands on an instrument platform in spectral analysis and detection, provides convenience to detection of fluorescence, Raman and laser induced atomic emission spectroscopic signals of substances and can be used for component detection and analysis of complex substances.
Description
Technical field
The invention belongs to field of spectral analysis technology, be specifically related to a kind of fluorescence, Raman, induced with laser atomic emission spectrum combined system.
Background technology
Fluorescence spectrum is a kind of emission spectrographic analysis method that fluorescent radiation intensity inspiring at radiation energy is carried out quantitative test.Object, through the illumination of shorter wavelength, gets up energy storage, then slowly emits the light of longer wavelength, and this light of emitting is just fluorescence, detects testee composition by energy and the wavelength relationship of analysis of fluorescence.
Raman spectrum is a kind of scattering spectrum, utilizes Ear Mucosa Treated by He Ne Laser Irradiation sample, obtains a kind of spectrographic method of material molecule vibration-rotation information by detecting the Raman shift at scattering spectra peak and intensity thereof.
The pulsed laser irradiation sample of induced with laser atomic emission analysis utilization high-peak power, light beam focuses on a very little analysis site.In the spot area of Ear Mucosa Treated by He Ne Laser Irradiation, ablated the peeling off of material in sample, and above sample, form nano particle cloud cluster.Because the peak energy of laser beam is quite high, its absorption and multiphoton ionization effect have increased the gas of sample top generation and the opacity of gasoloid cloud cluster, even if just very of short duration laser pulse excites.Because the energy of laser is absorbed by this cloud cluster significantly, plasma forms gradually.High-octane plasma makes nano particle fusing, by atomic excitation wherein and send light.The light that atom sends can be caught and be recorded as spectrum by detecting device, by spectrum is analyzed, can obtain the information that has which kind of element in sample, can carry out further qualitative analysis and quantitative test to spectrum by software algorithm.
It is very ripe that some adopt the spectral analysis technique of laser spectrum means in recent years, as: Raman spectrum, fluorescence spectrum etc., but be all the application of single spectrographic detection technology.Owing to there is a large amount of complex materials in actual life, single spectrographic detection technology cannot meet the demand of species analysis.As utilizing Raman spectrum to detect when fluorescent material, the interference of fluorescence is very serious, even can cover Raman signal completely, and this matter utilization fluorescence spectrum is while detecting, the fluorescence signal of the composition that some content are lower can be buried in oblivion by coloured soluble organic fluorescence spectrum.
In view of detected material composition has complicacy and multifarious feature, the analysis of complex material composition detection is needed to comprehensive many-sided spectral information.Utilize the instrument detection of many different analytical approachs to cause very large inconvenience to spectral analysis research activities, be therefore badly in need of a kind of analytical instrument with comprehensive detection ability.General Raman signal will be weaker than approximately 3 orders of magnitude of fluorescence, and atomic emission spectrum signal intensity is stronger, corresponding with fluorescence spectrum signal intensity, and three is similar for the basic demand of detector, and it is feasible therefore three being integrated in same system.
Summary of the invention
The object of the present invention is to provide a kind of fluorescence, Raman, induced with laser atomic emission spectrum combined system, realize Raman, fluorescence, induced with laser Atomic Emission Spectral Analysis coupling in same instrument platform, use a comprehensive many-sided spectral information of analytical instrument, realize complex material composition detection is analyzed.
In order to solve above technical matters, the concrete technical scheme that the present invention adopts is as follows:
A kind of fluorescence, Raman, induced with laser atomic emission spectrum combined system, is characterized in that: comprise light source module (1), light path module (2) and detection module (3);
Described light source module (1) comprises ultraviolet source (4) and LASER Light Source (5), ultraviolet source (4) and LASER Light Source (5) are by a movable tilting mirror, realizing output automatically switches, while measuring fluorescence spectrum, adopt ultraviolet source (4), while measuring Raman and induced with laser atomic emission spectrum, adopt LASER Light Source (5);
Described light path module (2) comprises monochromator (6), microscope sampling apparatus (7) and replaceable wave filter (8); Monochromator (6) input end is connected with ultraviolet source (4), and output terminal is connected with microscope sampling apparatus (7); Replaceable wave filter (8) input end one is connected with LASER Light Source (5), output terminal one is connected with the enlarged image input end of microscope sampling apparatus (7), and microscope sampling apparatus (7) output terminal is connected with replaceable trapper (8) input end two;
Described detection module (3) comprises replaceable grating (9) and CCD charge coupled cell (10), and detection module (3) input end is connected with replaceable wave filter (8) output terminal two.
Described replaceable wave filter (8) comprises the laser notch filter (11) and the long wave pass filter (12) that are positioned at before spectrometer input end, while measuring Raman, Laser-induced Breakdown Spectroscopy, adopt laser notch filter (11), while measuring fluorescence spectrum, adopt long wave pass filter (12).
Described LASER Light Source (5) comprises 532nm wavelength quasi-continuous operation laser, for measuring Raman spectrum; 532nm wavelength pulse work laser, for measuring Laser-induced Breakdown Spectroscopy.
Described monochromator (6) adopts four type concave grating designs, and resolution is 2 ~ 4nm, adopts optical fiber to be connected with microscope sampling apparatus (7).
Described replaceable grating (9) comprises 3 kinds of gratings: 1800 line gratings, and blaze wavelength 600nm, measures for Raman spectrum and induced with laser atomic emission spectrum, and service band covers 500nm-1100nm; 1200 line gratings, blaze wavelength 300nm, measures for the induced with laser atomic emission spectrum of ultraviolet band, and service band covers 300nm-700nm; 600 line gratings, blaze wavelength 500nm, is mainly used in ultraviolet excited fluorescence spectral measurement, and service band covers 400nm-1100nm.
the present invention has beneficial effect.The present invention is integrated in fluorescence, Raman, induced with laser Atomic Emission Spectral Analysis in same system, can switch corresponding detecting pattern according to difference detection demand, greatly reduce the demand to instrument platform in spectral analysis detection, for fluorescence, Raman, the induced with laser atomic emission spectrum signal of detection material are provided convenience.
Accompanying drawing explanation
Fig. 1 is the structural representation of fluorescence of the present invention, Raman, induced with laser atomic emission spectrum combined system embodiment.
In figure: 1 light source module, 2 light path modules, 3 detection modules, 4 ultraviolet sources, 5 LASER Light Source, 6 monochromators, 7 microscope sampling apparatuses, 8 replaceable wave filters, 9 replaceable gratings, 10 CCD charge coupled cells, 11 laser notch filters, 12 long wave pass filters.
Embodiment
Existing fluorescence, Raman, induced with laser Anlysis of Emission spectrometry device are all the analytical instrument of simple function, therefore, the present invention proposes the technical scheme of fluorescence, Raman, induced with laser atomic emission spectrum combined system, to realize, fluorescence, Raman, induced with laser Atomic Emission Spectral Analysis are integrated in to a function in system.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Figure 1, fluorescence, Raman, induced with laser atomic emission spectrum combined system comprise:
Light source module, comprises ultraviolet source and LASER Light Source, and ultraviolet source and LASER Light Source can be switched voluntarily, adopts ultraviolet source while measuring fluorescence spectrum, adopts LASER Light Source while measuring Raman, induced with laser atomic emission spectrum.
Light path module, comprise monochromator, microscope sampling apparatus, replaceable wave filter, monochromator input end is connected with ultraviolet source, output terminal is connected with microscope sampling apparatus, replaceable filter input end one is connected with LASER Light Source, output terminal one is connected with microscope sampling apparatus, and microscope sampling apparatus output terminal is connected with replaceable filter input end two.
Detection module, comprises replaceable grating and CCD charge coupled cell, and detection module input end is connected with replaceable filter output two.
In the present embodiment, while measuring fluorescence spectrum, adopt ultraviolet source, ultraviolet light becomes the exciting light of fluorescent material after monochromator becomes monochromatic light.The monochromatic excitation light producing is transmitted through the fiber to microscope sampling apparatus and is radiated at the fluorescence sending on sample and reflexes to replaceable wave filter through semi-transparent semi-reflecting lens, transfers to CCD charge coupled cell and be converted to corresponding electric signal after the plane grating that the fluorescence signal after long wave pass filter filters spurious signal glitters by 600 lines, 500nm.
In the present embodiment, monochromator adopts four type concave grating designs, and resolution is 2-4nm.
In the present embodiment, while measuring Raman spectrum, adopt LASER Light Source, wavelength is that reflection is transferred to microscope sampling apparatus and is radiated at and on sample, generates Raman scattering signal through laser notch filter for the LASER Light Source (laser works is at continuous state) of 532nm, reflex to laser notch filter through catoptron, filter out and transfer to CCD charge coupled cell after the plane grating that the Raman diffused light after laser Rayleigh signal glitters by 1800 lines, 600nm and be converted to corresponding electric signal.
In the present embodiment, while measuring induced with laser atomic emission spectrum, adopt pulsed laser light source, output wavelength is 532nm, the about 10ns of pulse width, focus on to be radiated at through microscope and on sample, produce plasma, collect and send light by the atomic excitation in sample and by microscope, reflex to laser trapper through catoptron, filter out atomic emission spectrum signal after strong laser Rayleigh signal and glitter and transfer to CCD charge coupled cell after plane grating and be converted to corresponding electric signal by glitter plane grating or 1200 lines, 300nm of 1800 lines, 600nm.Wherein 1200 line gratings are mainly used in the emission spectrum of the ultraviolet band of analyzing metal elements, and 1800 line gratings are mainly used in the emission spectrum of the nonmetalloid of analyzing visible waveband.
In the present embodiment, spectrometer module adopts the symmetrical CT structure of flat field.
In the present embodiment, in Raman Measurement process, laser works under continuation mode, the about 200mW power of continuous wave output 532nm laser.It is stable that Raman signal keeps.In induced with laser atomic emission spectrum measuring process, laser instrument operates under pulse mode, output 532nm laser, laser continues pulse width and is approximately 10ns, and gross energy is approximately 200mJ, and peak power is approximately 20MW, under this energy, most materials can be heated to atomization, and excite Generation of atoms emission spectrum.
In addition to the implementation, the present invention can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of requirement of the present invention.
Claims (5)
1. fluorescence, Raman, an induced with laser atomic emission spectrum combined system, is characterized in that: comprise light source module (1), light path module (2) and detection module (3);
Described light source module (1) comprises ultraviolet source (4) and LASER Light Source (5), ultraviolet source (4) and LASER Light Source (5) are by a movable tilting mirror, realizing output automatically switches, while measuring fluorescence spectrum, adopt ultraviolet source (4), while measuring Raman and induced with laser atomic emission spectrum, adopt LASER Light Source (5);
Described light path module (2) comprises monochromator (6), microscope sampling apparatus (7) and replaceable wave filter (8); Monochromator (6) input end is connected with ultraviolet source (4), and output terminal is connected with microscope sampling apparatus (7); Replaceable wave filter (8) input end one is connected with LASER Light Source (5), output terminal one is connected with the enlarged image input end of microscope sampling apparatus (7), and microscope sampling apparatus (7) output terminal is connected with replaceable trapper (8) input end two;
Described detection module (3) comprises replaceable grating (9) and CCD charge coupled cell (10), and detection module (3) input end is connected with replaceable wave filter (8) output terminal two.
2. a kind of fluorescence according to claim 1, Raman, induced with laser atomic emission spectrum combined system, it is characterized in that: replaceable wave filter (8) comprises the laser notch filter (11) and the long wave pass filter (12) that are positioned at before spectrometer input end, while measuring Raman, Laser-induced Breakdown Spectroscopy, adopt laser notch filter (11), while measuring fluorescence spectrum, adopt long wave pass filter (12).
3. a kind of fluorescence according to claim 1, Raman, Laser-induced Breakdown Spectroscopy combined system, is characterized in that: described LASER Light Source (5) comprises 532nm wavelength quasi-continuous operation laser, for measuring Raman spectrum; 532nm wavelength pulse work laser, for measuring Laser-induced Breakdown Spectroscopy.
4. a kind of fluorescence according to claim 1, Raman, Laser-induced Breakdown Spectroscopy combined system, it is characterized in that: described monochromator (6) adopts four type concave grating designs, resolution is 2 ~ 4nm, adopts optical fiber to be connected with microscope sampling apparatus (7).
5. a kind of fluorescence according to claim 1, Raman, Laser-induced Breakdown Spectroscopy combined system, it is characterized in that described replaceable grating (9) comprises 3 kinds of gratings: 1800 line gratings, blaze wavelength 600nm, measure for Raman spectrum and induced with laser atomic emission spectrum, service band covers 500nm-1100nm; 1200 line gratings, blaze wavelength 300nm, measures for the induced with laser atomic emission spectrum of ultraviolet band, and service band covers 300nm-700nm; 600 line gratings, blaze wavelength 500nm, is mainly used in ultraviolet excited fluorescence spectral measurement, and service band covers 400nm-1100nm.
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Cited By (15)
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| CN104165880A (en) * | 2014-08-20 | 2014-11-26 | 国家电网公司 | Online detecting method of dissolved gas in transformer oil |
| CN105548090A (en) * | 2015-12-09 | 2016-05-04 | 中国医学科学院生物医学工程研究所 | Detector for high-grade mahogany furniture material by means of optical detection |
| CN106404745A (en) * | 2016-11-24 | 2017-02-15 | 中国科学院长春光学精密机械与物理研究所 | Method for detecting deep ultraviolet laser radiation induction surface change of CaF2 optical substrate |
| CN106442449A (en) * | 2016-10-17 | 2017-02-22 | 中国科学院合肥物质科学研究院 | Laser-induced fluorescence detection device for bioaerosol |
| CN106770139A (en) * | 2017-02-15 | 2017-05-31 | 哈尔滨工业大学（威海） | A kind of miniature Ultraluminescence LED light spectrum torch |
| CN107044959A (en) * | 2017-02-16 | 2017-08-15 | 江苏大学 | Micro- multi-modal fusion spectral detection system |
| CN107515207A (en) * | 2017-08-10 | 2017-12-26 | 刘冠琳 | A kind of metabolic evaluation instrument and its detection method |
| CN110208246A (en) * | 2019-06-20 | 2019-09-06 | 华南师范大学 | A kind of portable laser Raman fluorometer system and water environment pollution monitoring device for water environment pollution monitoring |
| CN111220542A (en) * | 2019-12-19 | 2020-06-02 | 津海威视技术(天津)有限公司 | Multi-mode identification combined detection equipment and method |
| CN111521599A (en) * | 2020-06-15 | 2020-08-11 | 中国海洋大学 | Rapid detection system and detection method for micro-plastic in offshore sediments based on spatial heterodyne difference Raman spectroscopy |
| CN111786260A (en) * | 2016-06-03 | 2020-10-16 | 通用医疗公司 | System and method for micro-laser particles |
| CN112362635A (en) * | 2020-11-02 | 2021-02-12 | 公安部第三研究所 | Remote material detection device based on ultraviolet Raman spectrum analysis |
| CN112557362A (en) * | 2020-12-04 | 2021-03-26 | 厦门大学 | Synchronous fluorescence spectrum detection method using LED light source as continuous wave excitation light source |
| CN113984668A (en) * | 2021-12-06 | 2022-01-28 | 华中师范大学 | Raman spectrum-based portable detector for soil groundwater petroleum pollutants and rapid detection method |
| CN114459965A (en) * | 2021-12-30 | 2022-05-10 | 中船重工安谱（湖北）仪器有限公司 | Aerosol monitoring system and method |
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Cited By (18)
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| CN104165880A (en) * | 2014-08-20 | 2014-11-26 | 国家电网公司 | Online detecting method of dissolved gas in transformer oil |
| CN104165880B (en) * | 2014-08-20 | 2016-09-21 | 国家电网公司 | A kind of online test method of Gases Dissolved in Transformer Oil |
| CN105548090A (en) * | 2015-12-09 | 2016-05-04 | 中国医学科学院生物医学工程研究所 | Detector for high-grade mahogany furniture material by means of optical detection |
| CN111786260A (en) * | 2016-06-03 | 2020-10-16 | 通用医疗公司 | System and method for micro-laser particles |
| CN106442449A (en) * | 2016-10-17 | 2017-02-22 | 中国科学院合肥物质科学研究院 | Laser-induced fluorescence detection device for bioaerosol |
| CN106404745B (en) * | 2016-11-24 | 2019-09-10 | 中国科学院长春光学精密机械与物理研究所 | A kind of CaF2The radiation-induced surface change detecting method of optical substrate deep ultraviolet laser |
| CN106404745A (en) * | 2016-11-24 | 2017-02-15 | 中国科学院长春光学精密机械与物理研究所 | Method for detecting deep ultraviolet laser radiation induction surface change of CaF2 optical substrate |
| CN106770139B (en) * | 2017-02-15 | 2023-10-13 | 哈尔滨工业大学（威海） | Miniature ultraviolet fluorescence LED spectrum flashlight |
| CN106770139A (en) * | 2017-02-15 | 2017-05-31 | 哈尔滨工业大学（威海） | A kind of miniature Ultraluminescence LED light spectrum torch |
| CN107044959A (en) * | 2017-02-16 | 2017-08-15 | 江苏大学 | Micro- multi-modal fusion spectral detection system |
| CN107515207A (en) * | 2017-08-10 | 2017-12-26 | 刘冠琳 | A kind of metabolic evaluation instrument and its detection method |
| CN110208246A (en) * | 2019-06-20 | 2019-09-06 | 华南师范大学 | A kind of portable laser Raman fluorometer system and water environment pollution monitoring device for water environment pollution monitoring |
| CN111220542A (en) * | 2019-12-19 | 2020-06-02 | 津海威视技术(天津)有限公司 | Multi-mode identification combined detection equipment and method |
| CN111521599A (en) * | 2020-06-15 | 2020-08-11 | 中国海洋大学 | Rapid detection system and detection method for micro-plastic in offshore sediments based on spatial heterodyne difference Raman spectroscopy |
| CN112362635A (en) * | 2020-11-02 | 2021-02-12 | 公安部第三研究所 | Remote material detection device based on ultraviolet Raman spectrum analysis |
| CN112557362A (en) * | 2020-12-04 | 2021-03-26 | 厦门大学 | Synchronous fluorescence spectrum detection method using LED light source as continuous wave excitation light source |
| CN113984668A (en) * | 2021-12-06 | 2022-01-28 | 华中师范大学 | Raman spectrum-based portable detector for soil groundwater petroleum pollutants and rapid detection method |
| CN114459965A (en) * | 2021-12-30 | 2022-05-10 | 中船重工安谱（湖北）仪器有限公司 | Aerosol monitoring system and method |
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Application publication date: 20140528 |