CN206420773U - A kind of portable formaldehyde examination device based on fluorescence probe method - Google Patents
A kind of portable formaldehyde examination device based on fluorescence probe method Download PDFInfo
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- CN206420773U CN206420773U CN201621470819.5U CN201621470819U CN206420773U CN 206420773 U CN206420773 U CN 206420773U CN 201621470819 U CN201621470819 U CN 201621470819U CN 206420773 U CN206420773 U CN 206420773U
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Abstract
The utility model discloses a kind of portable formaldehyde examination device based on fluorescence probe method, including light source module, light path conduction module and sample detection module；The light source module includes light source, the first optical filter and the lens being sequentially connected from left to right；The light path conduction module includes sample cell, cuvette and optical fiber, the sample cell is located at the right side of the light source module, the cuvette is located in the sample cell, the cuvette is used for the fluorometric reagent for holding detection formaldehyde, described optical fiber one end is connected with the lens, and the other end is connected with the cuvette；The sample detection module includes the second optical filter and photoelectric sensor, and the photoelectric sensor is located at the side of the cuvette, and second optical filter is located between the cuvette and the photoelectric sensor；The utility model has the advantages that sensitivity is high, cost is low, using light, can meet the detection demand of scene and the field of circulation.
Description
Technical field
The utility model is related to Micrometry field, especially a kind of portable formaldehyde inspection based on fluorescence probe method
Survey device.
Background technology
Formaldehyde pollution problem is focused primarily upon in room, textile and food.For example in indoor decoration material and furniture
All contain formaldehyde in glued board, fiberboard, particieboard and all kinds of paint, coating；Textile in process of manufacture in order to
The elasticity of fabric can be increased, improve crapyness, dyefastness is improved, use the N- methylol compounds containing formaldehyde and cation tree
Fat and cause formaldehyde in textile residue problem；Water-soaked food mixes formaldehyde with coagulated protein anti-corrosion, improvement outward appearance, increase mouth
Formaldehyde is added in sense, inebriant to be prevented muddiness, increases transparency, and these can all cause the severe contamination of food, damage human body
Health.Content of formaldehyde turns into an important safety index of pollution monitoring in current room, textile, food.
The characteristics of fluorescence detection has high sensitivity, traditional fluorescence detector cost is high, light channel structure is complicated, equipment
Volume is big, is not particularly suited for scene and the field of circulation.Therefore, for a kind of portable inspection of fluorescence probe method detection formaldehyde development
Survey device and seem very necessary.
Utility model content
Based on above mentioned problem, the purpose of this utility model is to provide a kind of portable formaldehyde inspection based on fluorescence probe method
Device is surveyed, the detection means sensitivity is high, cost is low, using light, can meet the detection demand of scene and the field of circulation.
To achieve these goals, the technical solution adopted in the utility model is as follows：
A kind of portable formaldehyde examination device based on fluorescence probe method, including light source module, light path conduction module and sample
Product detection module；The light source module includes light source, the first optical filter and the lens being sequentially connected from left to right；The light path is passed
Guide module includes sample cell, cuvette and optical fiber, and the sample cell is located at the right side of the light source module, and the cuvette is located at
In the sample cell, the cuvette is used for the fluorometric reagent for holding detection formaldehyde, and described optical fiber one end connects with the lens
Connect, the other end is connected with the cuvette；The sample detection module includes the second optical filter and photoelectric sensor, the photoelectricity
Sensor is located at the side of the cuvette, and second optical filter is located between the cuvette and the photoelectric sensor.
First optical filter is placed in light source rear end, to filter out heterogeneous light.The lens are placed in after first optical filter
End, a small light spot is pooled by the scattered light Jing Guo colour filter.Described optical fiber one end is connected by fixed seat with light source module, light
Fine center is overlapped with spot center；The optical fiber other end is connected with the cuvette.In the sample detection module
Two optical filters are placed in the middle of the photoelectric sensor and the cuvette, to filter out interference light.The photoelectric sensor be placed in into
Penetrate the vertical direction of light.
As the preferred embodiment of embodiment, the light path conduction module also includes groove lid, and the groove lid is located at the sample
Above groove.
As the preferred embodiment of embodiment, the light source module also includes fixed seat, the light source, first optical filter
And the lens are in the fixed seat.
As the preferred embodiment of embodiment, the light source is LED, and its wavelength is 440nm.
As the preferred embodiment of embodiment, the wavelength of first optical filter is：440 ± 2nm, transmitance is more than 90%,
Its all band transmitance is less than 1%.
As the preferred embodiment of embodiment, the cuvette is glass or quartz colorimetric utensil.
As the preferred embodiment of embodiment, the wavelength of second optical filter is：550 ± 2nm, transmitance is more than 90%,
Its all band transmitance is less than 1%.
As the preferred embodiment of embodiment, the photoelectric sensor is silicon photo diode.
After above-mentioned technical scheme, the beneficial effects of the utility model are：Based on fluorescence probe method there is provided it is a kind of just
Take formula formaldehyde examination device, have the advantages that detection sensitivity is high, light and handy portable, cost is low, signal stabilization, can meet scene and
The detection demand of the field of circulation.
Brief description of the drawings
Fig. 1 is front view of the present utility model；
Fig. 2 is top view of the present utility model；
Fig. 3 is the mechanism figure that fluorescence probe method detects formaldehyde reaction.
Wherein, accompanying drawing is designated：Light source module 1, light source 11, the first optical filter 12, lens 13, fixing groove 14；Light path is passed
Guide module 2, sample cell 21, cuvette 22, optical fiber 23, groove lid 24；Sample detection module 3, the second optical filter 31, photoelectric sensor
32。
Embodiment
As shown in Figure 1 and Figure 2 above, the utility model discloses a kind of portable formaldehyde examination dress based on fluorescence probe method
Put, including light source module 1, light path conduction module 2 and sample detection module 3；The light source module 1 includes successively connecting from left to right
Light source 11, the first optical filter 12 and the lens 13 connect；The light path conduction module 2 includes sample cell 21, cuvette 22 and optical fiber
23, the sample cell 21 is located at the right side of the light source module 1, and the cuvette 22 is located in the sample cell 21, the ratio
Color ware is used for the fluorometric reagent for holding detection formaldehyde, and described one end of optical fiber 23 is connected with the lens 13, the other end with it is described
Cuvette 22 is connected；The sample detection module 3 includes the second optical filter 31 and photoelectric sensor 32, the photoelectric sensor 32
Located at the side of the cuvette 22, second optical filter 31 located at the cuvette 22 and the photoelectric sensor 32 it
Between.
The light source is LED/light source, and its right side is sequentially placed the first narrow band pass filter 12 and condenser lens 13, and is fixed on
In light source fixing groove 14, it is ensured that the stability of light source.
The LED/light source has the characteristics of wide waveband, monochromaticjty are good, stability is good, can be according to the excitation wavelength of detectable substance
Scope changes LED/light source, and the formaldehyde fluorescence probe that the utility model is used excites to be visible, using 440nm LED/light source.
Second narrow band pass filter 12 can select the optical filter of different wave length according to the wavelength of LED/light source.This practicality is new
The detection of type PARA FORMALDEHYDE PRILLS(91,95) uses 440nm LED/light source, therefore selects 440 ± 2nm narrow band pass filter, and transmitance is more than 90%, its
All band transmitance is less than 1%.
One end of the optical fiber 23 is fixed in light source fixing groove 14, it is connected with the right-hand member of condenser lens 13, optical fiber
23 other end is fixed on sample cell 21 so that exciting light can be irradiated on fluorescence cuvette 22.
The optical fiber 23 needs fixed position, and sample cell 21 is the size for being adapted to 1cm fluorescence cuvettes, and ensures optical fiber
The stabilization of the 23 sections irradiated area and position to ensure exciting light hot spot vertical with fluorescence cuvette 22.The light path guided modes
Block also includes groove lid 24, and the groove lid 24 is located at the top sample of sample cell 21, and the groove lid 24 is to close in test mode
Conjunction state.
The fluorescence cuvette of unlike material may be selected according to the excitation wavelength of institute's test sample product in the fluorescence cuvette 22.Example
The fluorescence cuvette of selection quartz material is needed if sample needs ultraviolet excitation, if desired for excited by visible light, then stone may be selected
The fluorescence cuvette of English or glass material.Excitation source in the utility model is visible ray, therefore quartz or glass material
The fluorescence cuvette of matter can be used.
Second narrow band pass filter 31 is disposed perpendicular on the position of exciting light light path, equal with fluorescence cuvette
OK.Silicon photo diode 32 is placed after second narrow band pass filter 31 is used to receive the fluorescence letter launched after sample is excited
Number.
Second narrow band pass filter 31 can select corresponding optical filter according to the launch wavelength of testing sample.This practicality is new
Fluorescence probe launches 550nm fluorescence, therefore 550 ± 2nm of selection in type system, and transmitance is more than 90%, and its all band is passed through
Rate is less than 1% narrow band pass filter, to filter out other interference light.
Workflow of the present utility model is：LED/light source sends excitation source, is filtered out by the first narrow band pass filter variegated
A hot spot is pooled by over-focusing lens, by fiber optic conduction to sample cell, the sample liquid in sample cell is sent out after being excited
Fluorescence is penetrated, the second narrow band pass filter set by vertical direction filters out (highly sensitive into photoelectric sensor after interference light
Silicon photo diode), and current signal is converted into, its signal is directly proportional to fluorescence intensity.
The fluorescence probe method detects that the principle foundation of formaldehyde is：First in the fluorescence probe and determinand of diazanyl derivatization
Aldimine condensation formation schiff bases occurs for aldehyde, and the purpose of detection residues of formaldehyde is reached by recording the change in fluorescence of fluorescence probe, its
Detection sensitivity is up to 30ppb, and reaction mechanism is as shown in Figure 3.
It is described above, only the utility model preferred embodiment, therefore the utility model implementation can not be limited successively
Scope, i.e., the equivalent changes and modifications made according to the utility model right and description all should still belong to this reality
In the range of new cover.
Claims (8)
1. a kind of portable formaldehyde examination device based on fluorescence probe method, including light source module, light path conduction module and sample
Detection module, it is characterised in that：The light source module includes light source, the first optical filter and the lens being sequentially connected from left to right；
The light path conduction module includes sample cell, cuvette and optical fiber, and the sample cell is located at the right side of the light source module, described
Cuvette be located at the sample cell in, the cuvette be used for hold detection formaldehyde fluorometric reagent, described optical fiber one end with
The lens connection, the other end is connected with the cuvette；The sample detection module includes the second optical filter and photoelectric sensing
Device, the photoelectric sensor is located at the side of the cuvette, and second optical filter is located at the cuvette and the photoelectricity
Between sensor.
2. a kind of portable formaldehyde examination device based on fluorescence probe method as claimed in claim 1, it is characterised in that：It is described
Light path conduction module also includes groove lid, and the groove lid is above the sample cell.
3. a kind of portable formaldehyde examination device based on fluorescence probe method as claimed in claim 1, it is characterised in that：It is described
Light source module also includes fixed seat, and the light source, first optical filter and the lens are in the fixed seat.
4. a kind of portable formaldehyde examination device based on fluorescence probe method as claimed in claim 1, it is characterised in that：It is described
Light source is LED, and its wavelength is 440nm.
5. a kind of portable formaldehyde examination device based on fluorescence probe method as claimed in claim 1, it is characterised in that：It is described
The wavelength of first optical filter is：440 ± 2nm, transmitance is more than 90%, and its all band transmitance is less than 1%.
6. a kind of portable formaldehyde examination device based on fluorescence probe method as claimed in claim 1, it is characterised in that：It is described
Cuvette is glass or quartz colorimetric utensil.
7. a kind of portable formaldehyde examination device based on fluorescence probe method as claimed in claim 1, it is characterised in that：It is described
The wavelength of second optical filter is：550 ± 2nm, transmitance is more than 90%, and its all band transmitance is less than 1%.
8. a kind of portable formaldehyde examination device based on fluorescence probe method as claimed in claim 1, it is characterised in that：It is described
Photoelectric sensor is silicon photo diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621470819.5U CN206420773U (en) | 2016-12-29 | 2016-12-29 | A kind of portable formaldehyde examination device based on fluorescence probe method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621470819.5U CN206420773U (en) | 2016-12-29 | 2016-12-29 | A kind of portable formaldehyde examination device based on fluorescence probe method |
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| CN201621470819.5U Active CN206420773U (en) | 2016-12-29 | 2016-12-29 | A kind of portable formaldehyde examination device based on fluorescence probe method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870523A (en) * | 2019-04-08 | 2019-06-11 | 山东悟空仪器有限公司 | Light source assembly, fluorescence detector and liquid chromatographic system |
| CN110006859A (en) * | 2019-03-05 | 2019-07-12 | 北京雪迪龙科技股份有限公司 | A kind of fluorescent material detection device and the method for detecting fluorescent material |
| CN110132850A (en) * | 2019-06-04 | 2019-08-16 | 武汉淡蓝环保科技开发有限公司 | A kind of exceeded automatic detection device of Vehicular formaldehyde |
| CN114705665A (en) * | 2022-06-02 | 2022-07-05 | 圣湘生物科技股份有限公司 | Fluorescence detection device and fluorescence detection method |
-
2016
- 2016-12-29 CN CN201621470819.5U patent/CN206420773U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110006859A (en) * | 2019-03-05 | 2019-07-12 | 北京雪迪龙科技股份有限公司 | A kind of fluorescent material detection device and the method for detecting fluorescent material |
| CN109870523A (en) * | 2019-04-08 | 2019-06-11 | 山东悟空仪器有限公司 | Light source assembly, fluorescence detector and liquid chromatographic system |
| CN110132850A (en) * | 2019-06-04 | 2019-08-16 | 武汉淡蓝环保科技开发有限公司 | A kind of exceeded automatic detection device of Vehicular formaldehyde |
| CN114705665A (en) * | 2022-06-02 | 2022-07-05 | 圣湘生物科技股份有限公司 | Fluorescence detection device and fluorescence detection method |
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