CN109187451A - It is a kind of for detecting the fluorescent optical sensor of chemical vapor - Google Patents
It is a kind of for detecting the fluorescent optical sensor of chemical vapor Download PDFInfo
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- CN109187451A CN109187451A CN201810868232.7A CN201810868232A CN109187451A CN 109187451 A CN109187451 A CN 109187451A CN 201810868232 A CN201810868232 A CN 201810868232A CN 109187451 A CN109187451 A CN 109187451A
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Classifications
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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
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
- G01N21/643—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" non-biological material
-
- 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
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
- G01N2021/6432—Quenching
Abstract
The present invention provides a kind of for detecting the fluorescent optical sensor of chemical vapor, comprising: excites optical element, tubular type test chamber, coated in the detection layers and fluorescence reception element on tubular type detection cavity wall；The excitation optical element is used to irradiate along the axial direction of the tubular type test chamber；The tubular type test chamber limits the gas flow direction of analyte for coating the detection layers；The detection layers and analyte react and change the intensity or spectrum that are inspired fluorescence by the excitation optical element；The fluorescence reception element be used to receive through the detection layers and analyte react influence after light beam, and judge whether the intensity of the fluorescence of the light beam or spectrum change.The detection layers of the fluorescent optical sensor use the sensitive fluorescence small molecule nano material with three-dimensional porous structure to improve the utilization rate of analyte, guarantee the consistency and reliability of testing result.
Description
Technical field
The present invention relates to substance detection technique field more particularly to a kind of fluorescent optical sensors.
Background technique
Fluorescent optical sensor is a kind of new chemical sensor of rising in recent years, this kind of sensor is usually built-in with sensitive glimmering
Optical sensor material occurs interaction with tested substance and changes intrinsic fluorescence intensity or spectral composition.Phosphor
Expect itself have very high sensitivity, for standardized equipment detect, only ensure that sensor material efficiently, uniformly, can
Control ground contact tested substance, just can guarantee the high sensitivity that its used material is embodied with the sensor that fluorescence principle is designed
And high reliability.
What is used in existing product is mostly flat fluorescent detection structure, when using this structure, detects the section of air-flow
It needs identical as sensor material macroscopic view area occupied.If flow cross-sectional product it is small, will cause some materials cannot contact to
Detection gas and influence to respond effect, if cross-sectional area is big, gas to be detected can be wasted, reduce sensitivity.
In planar structure, air-flow is vertical with sensor molecule or has certain angle, causes the blocking of gas circuit, may make
At the sinuous flow phenomenon of part, in addition, in instrument production process, it is difficult to ensure that the consistency of gas circuit and high collimation, thus exist
Detectable substance air flow method with different directions, speed, these can all cause the probability of practical contact sensor molecule in plane
It is upper inconsistent, to influence the sensitivity and reliability of sensor.
In addition, the area of exciting light and fluorescence reception element will be according to sensor material in plane detection structure
Area is designed, and leads to the poor universality of instrument；And planarized structure does not simultaneously have air-tightness, needs additional structure list
Member receives planar outboard design sealed unit along fluorescence, completes gas flow loop, and not only structure is complicated changes, but also increases detection knot
The volume of structure.
Summary of the invention
Present invention seek to address that problem as described above.It is an object of the present invention to provide in a kind of solution problem above
Any one fluorescent optical sensor.Specifically, the present invention provides and can be improved air-flow utilization rate, the fluorescence of miniaturized structure passes
Sensor.
In order to solve the above technical problems, the present invention provides a kind of for detecting the fluorescent optical sensor of chemical vapor,
The fluorescent optical sensor include: excite optical element, tubular type test chamber, coated in the tubular type detection cavity wall on detection layers and
Fluorescence reception element；The excitation optical element is located at one end of the tubular type test chamber, for the axis along the tubular type test chamber
It is irradiated to direction；The tubular type test chamber limits the gas flow direction of analyte for coating the detection layers；It is described
Detection layers and analyte react and change the intensity or spectrum that are inspired fluorescence by the excitation optical element；The fluorescence
Receiving element is located at the other end of the tubular type test chamber, reacts and shadow for receiving through the detection layers and analyte
Light beam after sound, and judge whether the intensity of the fluorescence of the light beam or spectrum change.
Wherein, the detection layers are that sensitive fluorescence small molecule nano material coats to be formed.
Wherein, the detection layers with a thickness of 10~5000nm, coated length in the tubular type test chamber is 2~
30mm。
Wherein, the detection layers with a thickness of 500~1000nm, coated length in the tubular type test chamber is 10~
20mm。
Wherein, the internal diameter of the tubular type test chamber is 0.2~2mm, and outer diameter is 2~10mm, and length is 5~300mm.
Wherein, the internal diameter of the tubular type test chamber is 0.5~1mm, and outer diameter is 4~7mm, and length is 15~50mm.
Wherein, the fluorescent optical sensor further includes optical filter, the optical filter be located at the fluorescence reception element with it is described
Between tubular type test chamber, for reducing or exclude influence of the exciting light to the fluorescence reception element.
Wherein, the fluorescent optical sensor further includes light bar, and the light bar is located at the excitation optical element and the tubular type is examined
It surveys between chamber, for intercepting the exciting light without the tubular type test chamber.
Wherein, the fluorescent optical sensor further includes tubular structure part and coupling tube, wherein the tubular structure part with it is described
The arrival end of tubular type test chamber is tightly connected, and the outlet end of the coupling tube and the tubular type test chamber is tightly connected；It is described to swash
Light-emitting component is located in the tubular structure part；Several through-holes are provided on the tube wall of the coupling tube, convenient for analyte
Steam discharge.
Fluorescent optical sensor of the invention improves the sensitivity and reliability of sensor using tubular type test chamber, and utilizes excitation
Optical element irradiates to be further simplified and reduce product structure in parallel with tubular type test chamber；Detection layers, which use, has three-dimensional porous knot
The sensitive fluorescence small molecule nano material of structure, improves the utilization rate of analyte, and guarantees the consistency of testing result and reliable
Property.
Being described below for exemplary embodiment is read with reference to the drawings, other property features of the invention and advantage will
It is apparent from.
Detailed description of the invention
It is incorporated into specification and the attached drawing for constituting part of specification shows the embodiment of the present invention, and with
Principle for explaining the present invention together is described.In the drawings, similar appended drawing reference is for indicating similar element.Under
Attached drawing in the description of face is some embodiments of the present invention, rather than whole embodiments.Those of ordinary skill in the art are come
It says, without creative efforts, other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 schematically illustrates the structural schematic diagram of fluorescent optical sensor of the invention；
Fig. 2 schematically illustrates the schematic diagram that excitation optical element is irradiated perpendicular to tubular type test chamber；
Fig. 3 schematically illustrates calculating simulation result chart when excitation optical element is irradiated perpendicular to tubular type test chamber；
Fig. 4 schematically illustrates the schematic diagram that excitation optical element is parallel to the irradiation of tubular type test chamber；
Fig. 5 schematically illustrates calculating simulation result chart when excitation optical element is parallel to the irradiation of tubular type test chamber；
Fig. 6 schematically illustrates the chemical structure of a kind of sensitive fluorescence small-molecule substance of detection layers use；
Fig. 7 schematically illustrates the chemical structure and its synthetic route of a kind of detection layers substance；
Fig. 8 schematically illustrates a kind of nanostructure of detection layers.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.It needs
Illustrate, in the absence of conflict, the features in the embodiments and the embodiments of the present application can mutual any combination.
Inventor while simplifying product structure, guarantees tested substance by designing a kind of test chamber of tubular structure
It can come into full contact with and act on detection layers, improve the sensitivity and reliability of sensor；Pipe is parallel to using excitation optical element
The axial irradiation of formula test chamber, guarantees that exciting light is evenly distributed, further increases the utilization rate of material to improve testing result
Consistency；Further, the inner surface shape of test chamber is coated in using the nano micromolecule fluorescent material with bigger serface
At detection layers, influence of the thickness of detection layers for testing result is smaller, is easy to the processing of product.
With reference to the accompanying drawing, provided fluorescent optical sensor according to the present invention is described in detail.
Fig. 1 shows a kind of structural schematic diagram of specific embodiment of fluorescent optical sensor of the invention, shown referring to Fig.1,
The fluorescent optical sensor includes: to excite optical element 1, tubular type test chamber 2, coated in detection layers 3 on 2 inner wall of tubular type test chamber and glimmering
Light receiving element 4.Fluorescent optical sensor of the invention is for detecting chemical vapor, for example, can detecte chemical gas, it can also
To detect the steam of the substances such as chemical liquid, solid.
Wherein, excitation optical element 1 is located at one end of tubular type test chamber 2, for the axial direction photograph along tubular type test chamber 2
It penetrates, the excitation beam of detection is provided.
Tubular type test chamber 2 limits the gas flow direction of analyte for coating detection layers 3；Analyte is being pressed
Entered under the action of strong by one end of tubular type test chamber 2, can accurately control analyte and detection layers 3 by controlling air-flow
Time of contact, to guarantee the repeatability of sensor detection.
Detection layers 3 react with analyte, the interaction including physically and/or chemically aspect, and change and be excited
The intensity or spectrum for the fluorescence that light-emitting component 1 inspires；
Fluorescence reception element 4 is located at the other end of tubular type test chamber 2, for receive excitation optical element 1 issue and through examining
It surveys layer 3 and analyte reacts (interaction including physically and/or chemically aspect) and the light beam after influence, and judge
Whether the intensity or spectrum of the fluorescence of this light beam change.
It not only will test chamber in the technical solution used in the present invention and be set as tubular structure, and excitation optical element is placed in
One end of tubular type test chamber enables it irradiate along the axial direction that light is test chamber, to guarantee that detection layers are illuminated uniformly, while can subtract
The volume of small sensor simplifies structure.
Fig. 2 is to excite optical element perpendicular to the radiation response schematic diagram of tubular type test chamber axially irradiated, and Fig. 3 calculates for it
Analog result chart, Fig. 4 are the effect diagram for exciting optical element axially to be irradiated by one end of tubular type test chamber along it, i.e. this hair
The using effect schematic diagram of bright technical solution, Fig. 5 are the calculating simulation result chart of the scheme in Fig. 4.Comprehensive Correlation it is found that
When exciting axial direction of the optical element perpendicular to tubular type test chamber to irradiate, tubular type test chamber only has the side towards excitation optical element bright
Have light beam entrance aobviously, and the other side almost by light beam irradiate less than；And as shown in figure 4, when excitation optical element is detected by tubular type
When one end of chamber is axially irradiated along it (light source intensity and minimum distance apart from tubular type test chamber are constant), excitation beam is along pipe
The radial distribution of formula test chamber is uniform, so that detection layers are illuminated uniformly and excite fluorescence, so that detection layers 3 are axially and radially
It is more fully utilized, to verify whether analyte can influence the fluorescence of detection layers.
In addition, considering from sensor cavity volume, sensor of the invention design also has many advantages, such as, biography of the invention
In sensor structure, all elements along the axial alignment of fluorometry tube, avoid be radially disposed any component (such as swash
Light-emitting component, fluorescence detection element etc.), accordingly it is also possible to the connection or support construction of these elements be completely removed, to simplify
Sensor structure；Meanwhile excitation optical element, fluorescence detection element are integrated into air-channel system by the present invention, are set compared to existing
The technical solution of meter has further reduced the volume of sensor, especially in the axial direction, is conducive to develop handheld and wearable type etc.
Portable detection equipment, while the detecting instrument for said minuscule hole can be developed.
It should be pointed out that detection layers 3 are the painting of sensitive fluorescence small molecule nano material in fluorescent optical sensor of the invention
It covers to be formed.Sensitive fluorescence small molecule nano material is three-dimensional porous material, and specific surface area is more with respect to conventional polymer polymer
Greatly.Inventor passes through a large amount of verification experimental verification, and using small organic molecule nano material as detection layers, detection effect is examined
The influence of thickness degree is smaller, the coherence request being more conducively mass produced.
Fluorescent optical sensor in the prior art mostly uses high molecular polymer to do detection layers.High molecular polymer can be formed
Smooth and fine and close film, the subelement for forming its membrane structure is macromolecular chain skeleton, and the rugosity of the skeleton is only 2~5nm,
And have stronger interaction, therefore, the microstructure of the film show as these skeletons aggregation and discrete, thickness
Show several nanometers of big fluctuatings, and there is very small hole, target detection thing be difficult to by so small hole into
Enter inside macromolecule membrane.But when by excitation, internal macromolecule still can emit fluorescence, therefore macromolecule
Polymer film thickness is very big for detection effect influence, and similar results also receive existing open source literature (bibliography
J.Am.Chem.Soc., 1998,120 (21), pp5321-5322) confirmation.
And for sensitive fluorescence small molecule nano material, small molecule passes through strong interaction (such as π-π phase interaction first
With, interaction of hydrogen bond etc.) constitute nanostructure assembling body, such as nano wire, nanobelt, nanosphere, nanometer sheet etc., they compared with
Small dimension is generally tens nanometers, and longer dimension is a few micrometers or longer.Since these intermolecular interactions are stronger, make
Obtaining these Nanoscale assemblies has very big rigidity.These structures constitute the three of low-density by loose weak interaction again
Porous material is tieed up, therefore gaseous matter can be spread on the detection layers thickness direction that sensitive fluorescence small molecule nano material is constituted
Larger distance.It is corresponding, this make small molecule nano material in a thickness direction and have dozens or even hundreds of nanometer it is effective away from
From, even if there are the fluctuatings of the thickness of dozens or even hundreds of nanometer, and due to its contact gas molecule high efficiency, can't be to sound
Induction signal causes significantly to rise and fall.Therefore, it is detected by using sensitive fluorescence small molecule nanostructure, it can be substance to be detected
It is contacted with the two-dimensional surface of high molecular polymer and is converted to substance to be detected and is contacted with the 3 D stereo of sensing material.Compared to high score
Sub- polymer is since in response to consistency and for the high request of film thickness, sensitive fluorescence small molecule nano material has very
Big improvement and advantage.
Specifically, the nano material (nanometer that detection layers 3 can be constituted using the sensitive fluorescence small molecule of special designing
Point, nano wire, nanobelt and its secondary package assembly), this kind of material structure is transferred to the position of detection layers 3 using ad hoc approach
It sets and is fixed, to reach detection effect.
For example, when fluorescent optical sensor of the invention is for when detecting explosive molecular vapor, can choose to have such as Fig. 6 institute
Show the sensitive small molecule of chemical structure, n=1~20 in figure.Wherein, R1For carbon-carbon double bond (- CH=CH-, R, S configuration) or
Triple carbon-carbon bonds (- C ≡ C-)；R2For the alkane based structures that straight chain or branch carbochain are constituted, general formula is-CmH2m+1, each other may be used
With same or different；R3It is with substituted group (including hydroxyl or phenolic group-OH, alkoxy-OC for two sidesmH2m+1, carbonyl-
COCmH2m+, ester group-COOCmH2m+1) phenyl ring, thiophene, furans, pyrrole group, wherein m=1~20.
Such small-molecule substance passes through certain physical chemistry self assembling process, can form the nanometer for meeting requirement
Cable architecture.
Specifically, the chloroformic solution that configure the above molecule, make its concentration range 0.01~1mg/mL (if necessary,
Allow to be heated to 50 DEG C of highest)；Then this solution is rapidly injected in the methanol that volume ratio is 1:1~1:20, as needed, first
The temperature range of alcohol is 0~50 DEG C；After the mixed solution is stood one day, there is white flock precipitate in solution bottom, as
Prepared sensitive fluorescence small molecule nano wire.The material is directly drawn, injects in tubular type test chamber 2, is aided with certain frequency
Vibration can complete the coating preparation of detection layers 3.The material is to generate specificity to broad category of explosive (such as TNT)
Fluorescent quenching response, to realize fluorescence detection.
This so line has the width of 10~1000nm, and 0.1~500 μm of length can form loose three dimensional network
Shape structure has great specific surface area.Meanwhile gas is when the surface of the material is flowed through, it can be along tridimensional network
Body phase is penetrated into, realizes the efficient utilization of sensitive fluorescence small molecule nano wire.It is tens of compared to macromolecule polymer material
Nanometer, this material can be accumulated in the form of thicker and be attached in tubular type test chamber 2, improved sensitivity, extended sensitive fluorescence
The service life of material.
In a typical embodiment, R1For-C ≡ C-, R2For-n-C8H17, R3Selection-o-C6H4-COOCH3, n=2.
Fig. 7 shows the chemical structure and its synthetic route of the substance in this embodiment.When preparing nano wire, the condition used is
The solution 10mL of 0.2mg/mL is injected into the methanol of 100mL at room temperature, stand one day after can be obtained the material carry out using.
The nano junction composition for the material that Fig. 8 is obtained in embodiment thus.
In addition, fluorescent optical sensor of the invention not only responds explosive, different sensitive fluorescences can also be used
Small molecule nano material is as detection layers, in the case where keeping other structures constant, detects such as volatile organic matter
(VOC), toxic industrial gas (TIC), oxidizing gas, reducibility gas, gaseous active free radical, air pollution etc..
Under normal conditions, the internal diameter of tubular type test chamber 2 is 0.2~2mm, and outer diameter is 2~10mm, and length is 5~300mm.
Preferably, the internal diameter of tubular type test chamber 2 is 0.5~1mm, and outer diameter is 4~7mm, and length is 15~50mm.
Adaptably, detection layers 3 with a thickness of 10~5000nm, coated length in tubular type test chamber 2 is 2~
30mm.Preferably, the thickness of detection layers 3 can be set to 500~1000nm, and the coated length in tubular type test chamber 2 is 10
~20mm.Using sensitive fluorescence small molecule nano material as detection layers 3, thickness range of choice is wider, and there are the selection upper limits
The main reason for may be relatively strong for absorption of the material for exciting light, blocked up material can make internal detection layers be stimulated amplitude change
It is weak, overall sensitivity is influenced, stock utilization is caused to decline.
In a typical embodiment, fluorescent optical sensor of the invention can also include optical filter 5, and optical filter 5 is located at
Between fluorescence reception element 4 and tubular type test chamber 2, for filtering exciting light, filters out and do not reacted shadow with detection layers by analyte
Loud spectrum reduces or excludes influence of the exciting light to fluorescence reception element.
Specifically, which further includes light bar 8, the setting of light bar 8 excitation optical element 1 and tubular type test chamber 2 it
Between, for intercepting the exciting light without tubular type test chamber 2.
As shown in Figure 1, the fluorescent optical sensor further includes tubular structure part 9 and coupling tube 10, wherein tubular structure part 9 with
The arrival end of tubular type test chamber 2 is tightly connected, and the outlet end of coupling tube 10 and tubular type test chamber 2 is tightly connected, and is located at and filters
Between piece 5 and tubular type test chamber 2.
Excitation optical element 1 and light bar 8 are respectively positioned in tubular structure part 9.Specifically, excite optical element 1 and light bar 8 are outstanding to set
In tubular structure part 9.In the present embodiment, excitation optical element 1 is fixed in tubular structure part 9 by the first support construction 6,
Light bar 8 is fixed in tubular structure part 9 by the second support construction 7, and optical element 1 and light bar 8 is excited to be respectively positioned on tubular structure
The radial centre of part 9.
Several through-holes are provided on the tube wall of coupling tube 10, for example, including at least one section in coupling tube 10 has aperture
Structure or meso-hole structure, convenient for analyte gas be discharged.
Further, it is additionally provided with pipe fitting 11 in the outlet end of tubular type test chamber 2, is connect for fixing optical filter 5 and fluorescence
Receive element 4.Pipe fitting 11 is located at the exit of coupling tube 10, is tightly connected with coupling tube 10, avoids having light leakage, shadow at gap
Ring testing result.
Descriptions above can combine implementation individually or in various ways, and these variants all exist
Within protection scope of the present invention.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence " including one ... ", it is not excluded that wrapping
Include in the process, method, article or equipment of the element that there is also other identical elements.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations.Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (9)
1. a kind of for detecting the fluorescent optical sensor of chemical vapor, which is characterized in that the fluorescent optical sensor includes: excitation
Optical element (1), tubular type test chamber (2), the detection layers (3) being coated on tubular type test chamber (2) inner wall and fluorescence reception member
Part (4)；
Excitation optical element (1) is located at one end of the tubular type test chamber (2), for the axis along the tubular type test chamber (2)
It is irradiated to direction；
The tubular type test chamber (2) limits the gas flow direction of analyte for coating the detection layers (3)；
The detection layers (3) and analyte react and change the intensity for being inspired fluorescence by excitation optical element (1)
Or spectrum；
The fluorescence reception element (4) is located at the other end of the tubular type test chamber (2), for receiving through the detection layers (3)
Light beam after reacting and influencing with analyte, and judge whether the intensity of the fluorescence of the light beam or spectrum become
Change.
2. fluorescent optical sensor as described in claim 1, which is characterized in that the detection layers (3) are that sensitive fluorescence small molecule is received
Rice material coats to be formed.
3. fluorescent optical sensor as described in claim 1, which is characterized in that the detection layers (3) with a thickness of 10~5000nm,
Coated length in the tubular type test chamber (2) is 2~30mm.
4. fluorescent optical sensor as described in claim 1, which is characterized in that the detection layers (3) with a thickness of 500~
1000nm, the coated length in the tubular type test chamber (2) are 10~20mm.
5. fluorescent optical sensor as described in claim 1, which is characterized in that the internal diameter of the tubular type test chamber (2) be 0.2~
2mm, outer diameter are 2~10mm, and length is 5~300mm.
6. fluorescent optical sensor as described in claim 1, which is characterized in that the internal diameter of the tubular type test chamber (2) be 0.5~
1mm, outer diameter are 4~7mm, and length is 15~50mm.
7. fluorescent optical sensor as described in claim 1, which is characterized in that the fluorescent optical sensor further includes optical filter (5), institute
Optical filter (5) are stated between the fluorescence reception element (4) and the tubular type test chamber (2), for reducing or exclude excitation
Influence of the light to the fluorescence reception element (4).
8. fluorescent optical sensor as described in claim 1, which is characterized in that the fluorescent optical sensor further includes light bar (8), described
Light bar (8) is examined for intercepting without the tubular type between the excitation optical element (1) and the tubular type test chamber (2)
Survey the exciting light of chamber (2).
9. fluorescent optical sensor as described in claim 1, which is characterized in that the fluorescent optical sensor further includes tubular structure part
(9) and coupling tube (10), wherein the arrival end of the tubular structure part (9) and the tubular type test chamber (2) is tightly connected, institute
The outlet end for stating coupling tube (10) and the tubular type test chamber (2) is tightly connected；
The excitation optical element (1) is located in the tubular structure part (9)；
Several through-holes are provided on the tube wall of the coupling tube (10), are discharged convenient for the steam of analyte.
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| CN201810868232.7A CN109187451B (en) | 2018-08-02 | 2018-08-02 | Fluorescent sensor for detecting chemical substance steam |
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