CN209132152U - A kind of extinction pipe and the gas phase molecular absorption spectrometer containing the extinction pipe - Google Patents
A kind of extinction pipe and the gas phase molecular absorption spectrometer containing the extinction pipe Download PDFInfo
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- CN209132152U CN209132152U CN201821829046.4U CN201821829046U CN209132152U CN 209132152 U CN209132152 U CN 209132152U CN 201821829046 U CN201821829046 U CN 201821829046U CN 209132152 U CN209132152 U CN 209132152U
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Abstract
A kind of gas phase molecular absorption spectrometer the utility model relates to extinction pipe and containing the extinction pipe, extinction pipe includes extinction tube body, extinction tube body includes at least two straight pipes being serially connected, the reflective mirror being arranged between adjacent two straight pipe and the communicating pipe being arranged between adjacent two straight pipe, the central axis of adjacent two straight pipe is not conllinear, the both ends of straight pipe are respectively equipped with light inputting end transparent window and out light end transparent window, offer air inlet and gas outlet respectively on extinction tube body.Compared with prior art, the utility model is by being divided into multiple straight pipes being serially connected for extinction tube body, and reflective mirror is set between adjacent two straight pipe, it can make the light beam entered in extinction pipe by light source along extinction tube body internal motion and reach detector, realization provides longer light path in limited spectrometer space, the absorbance measured is improved, guarantees the accuracy of testing result.
Description
Technical field
The utility model belongs to environment measuring and chemical analysis technology field, is related to a kind of extinction pipe and contains the extinction pipe
Gas phase molecular absorption spectrometer.
Background technique
In environment measuring and chemical analysis field, gas-phase molecular absorption spectrometry method (abbreviation GPMAS) is common one kind
Analysis method can be used for measuring ammonia nitrogen, total nitrogen, sulfide, nitrate nitrogen, nitrite nitrogen, kjeldahl nitrogen etc..Gas molecule in space absorbs
Spectroscopic methodology is that the gas resolved into based on tested ingredient abides by light absorption to the concentration of the absorption intensity of light and the tested ingredient
Law this principle is quantitative determined；In addition, according to the difference of tested ingredient draws wavelength, it can also be to tested ingredient
Type be determined, and then realize qualitative analysis.
The testing principle of gas-phase molecular absorption spectrometry method is: first by chemical reaction, by the ion in aqueous solution or dividing
Son is converted into certain gas, these gas molecules are generally in relatively steady state in the case where not influenced by the external world, claims
Be ground state gas molecule.But when these gas molecules receive the light radiation of specific wavelength, it is easy to generate corresponding
Molecular vibration.Occur molecular vibration needed for energy be it is certain, this specific energy is known as characterization of molecules spectral line.In gas phase
In molecular absorption spectrometry, the light source of specific wavelength is selected, gaseous molecular generates molecule vibration to the characteristic wavelength light that the light source issues
It is dynamic to absorb, molecular concentration is calculated according to the degree that is absorbed of light.
Generally speaking, gas-phase molecular absorption spectrometry method be exactly using the gas molecule of ground state can absorb specific UV spectrum and
The method measured, using the molecular vibration absorption principle of gas, certain linear relationship is presented in gas concentration and absorbance,
That is Lambert-Beer's law: when luminous intensity is I0Light beam by concentration be c gas when, luminous intensity weakens to I, each physical quantity
Between meet following formula:
In formula:
A --- absorbance (absorbance), or be optical density (optical density)；
I0--- incident intensity；I --- light beam passes through the transmitted intensity after gas；
T --- transmittance, i.e. the ratio between transmitted intensity and incident intensity；
K --- the absorbed proportionality coefficient of light, i.e. absorptivity；
D --- light path holds the length of the extinction pipe of gas；
C --- gas concentration.
Above formula explanation, absorbance and ingredient breakdown tested in sample are in a linear relationship at the concentration of gas, and gas
Concentration be in again quantitative relationship with measured component concentration, therefore, the absorbance measured i.e. with ingredient tested in sample
Concentration is in a linear relationship.
Gas phase molecular absorption spectrometer is a kind of instrument that water analysis is carried out using gas-phase molecular absorption spectrometry method, knot
Structure generally includes sample introduction mechanism, gas-liquid separation mechanism, light source, gas photoelectric detection mechanism, control mechanism etc..However, existing
Gas phase molecular absorption spectrometer has that the absorbance measured is lower when carrying out water analysis, cause detection error compared with
Greatly, the accuracy of testing result is affected.
Utility model content
The purpose of this utility model be exactly in order to overcome the problems of the above-mentioned prior art and provide a kind of extinction pipe and
Gas phase molecular absorption spectrometer containing the extinction pipe.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of extinction pipe, the extinction pipe include extinction tube body, and the extinction tube body includes at least two mutual strings
The straight pipe of connection, the reflective mirror being arranged between adjacent two straight pipe and the communicating pipe being arranged between adjacent two straight pipe,
The central axis of adjacent two straight pipe is not conllinear, and the both ends of the straight pipe are respectively equipped with light inputting end transparent window and light end is saturating out
Bright window offers air inlet and gas outlet on the extinction tube body respectively.Light inputting end transparent window and light end is transparent out
Window is by the sealing two ends of corresponding straight pipe.By being passed through sample gas in air inlet thereto a straight pipe, after through even
Siphunculus successively flows into remaining straight pipe, so that sample gas is uniformly dispersed in extinction tube body.Extinction tube body is in bending
Shape guarantees under the confined space in spectrometer, increases optical path length as far as possible.
Further, one or more reflective mirrors are equipped between adjacent two straight pipe.Reflective mirror can will with it is previous
The conllinear light of straight pipe central axis changes the direction of propagation and adjusts to conllinear with the latter straight pipe central axis, it is ensured that light can
To sequentially pass through all straight pipes.
Further, the angle between the central axis of adjacent two straight pipe is 0-180 °.
Further, adjacent two straight pipe is arranged in a mutually vertical manner or arranged in parallel.Guarantee the laying of multiple straight pipes
It is more compact, to save space.
Further, the extinction tube body is L-shaped, U-shaped or S-shaped.Extinction tube body can also by multiple L shapes, U-shaped or
S-shaped is composed, and so as to close arrangement in three dimensions, further saves the inner space of spectrometer.
Further, the air inlet and gas outlet are provided with the side of extinction tube body.Guarantee air inlet and goes out
Port does not overlap with the propagation path of light.
A kind of gas phase molecular absorption spectrometer, the spectrometer contain the extinction pipe.
Further, which further includes light source compatible with the both ends of extinction tube body and detector respectively.
Optical splitter is equipped between one end and detector of the extinction tube body as a preferred technical solution,.
A kind of detection method based on gas phase molecular absorption spectrometer, this method are as follows: sample gas is passed through extinction pipe sheet
Internal portion, the light inputting end transparent window that the light beam that light source issues later passes through extinction tube body one end enter in extinction tube body
Portion, after mirror reflection, across going out in light end transparent window and entrance detector for the extinction tube body other end.
In the gas photoelectric detection mechanism of gas phase molecular absorption spectrometer, extinction pipe is the optical path pass for constituting gas detection
Button apparatus, which constitute the effective light paths of gas.By Lambert-Beer's law it is found that light path is longer, the result measured is more accurate.
And existing gas phase molecular absorption spectrometer is limited to the structure design of therein, and the optical path length of its extinction pipe is caused to be limited
System, conventional method are difficult to promote its absorbance.Traditional gas phase molecular absorption spectrometer is designed using single tube absorption cell, in order to add
Long light path is to improve equipment detection limit and sensitivity, only by constantly lengthening single tube length.It does so and allows for equipment entirety light
Line structure is constantly elongated, and machine volume becomes larger, and is unfavorable for device miniaturization Integration Design.
Compared with prior art, the utility model is by being divided into multiple straight pipes being serially connected for extinction tube body, and
Reflective mirror is set between adjacent two straight pipe, the light beam entered in extinction pipe by light source fortune inside extinction tube body can be made
Detector is moved and reaches, realization provides longer light path in limited spectrometer space, improves the absorbance measured, guarantees inspection
Survey the accuracy of result.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of extinction pipe in embodiment 1；
Fig. 2 is the structural schematic diagram of extinction pipe in embodiment 2；
Description of symbols in figure:
1-straight pipe, 2-reflective mirrors, 3-communicating pipes, 4-light inputting end transparent windows, 5-go out light end transparent window, 6-
Air inlet, 7-gas outlets, 8-light sources, 9-detectors.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.The present embodiment is with the utility model
Implemented premised on technical solution, the detailed implementation method and specific operation process are given, but the guarantor of the utility model
Shield range is not limited to the following embodiments.
Embodiment 1:
A kind of gas phase molecular absorption spectrometer, the spectrometer include extinction pipe as shown in Figure 1, which includes extinction
Tube body, extinction tube body include two straight pipes being serially connected 1, a reflective mirror 2 being arranged between two straight pipes 1 with
And the communicating pipe 3 between two straight pipes 1 is set, two straight pipes 1 are arranged in a mutually vertical manner, the both ends of straight pipe 1 be respectively equipped with into
Light end transparent window 4 and out light end transparent window 5 offer air inlet 6 and gas outlet 7 on extinction tube body respectively.Air inlet 6
And gas outlet 7 is provided with the side of extinction tube body.
Spectrometer further includes light source 8 compatible with the both ends of extinction tube body and detector 9 respectively.
When detection, sample gas is passed through inside extinction tube body by air inlet 6, the light beam that light source 8 issues later passes through
The light inputting end transparent window 4 of extinction tube body one end enters inside extinction tube body, after the reflection of reflective mirror 2, passes through extinction pipe
The ontology other end goes out light end transparent window 5 and enters in detector 9.After detection, by the sample inside extinction tube body
Gas is discharged by gas outlet 7.Sample gas can cover whole process under the complete long light-path that extinction tube body is constituted, it is ensured that inspection
The accuracy of survey.
Since the absorption optical path of overlength being placed in spectrometer in limited space using straight pipe 1 and reflective mirror 2,
While realizing long light path, the volume of extinction pipe occupancy is greatly reduced, so that product design is more flexible.
Embodiment 2:
A kind of extinction pipe as shown in Figure 2, the extinction pipe include extinction tube body, and extinction tube body includes two mutually strings
The straight pipe 1 of connection, two reflective mirrors 2 being arranged between adjacent two straight pipe 1 and the connection being arranged between two straight pipes 1
Pipe 3, two straight pipes 1 are arranged in parallel, and the both ends of straight pipe 1 are respectively equipped with light inputting end transparent window 4 and out light end transparency window
Mouthfuls 5, air inlet 6 and gas outlet 7 are offered respectively on extinction tube body.Air inlet 6 and gas outlet 7 are provided with extinction tube body
Side.
Embodiment 3:
In the present embodiment, extinction tube body include three straight pipes being serially connected 1, setting adjacent two straight pipe 1 it
Between reflective mirror 2 and communicating pipe 3 for being arranged between adjacent two straight pipe 1, the central axis of adjacent two straight pipe 1 is not conllinear,
The both ends of straight pipe 1 are respectively equipped with light inputting end transparent window 4 and out light end transparent window 5, offer respectively on extinction tube body
Air inlet 6 and gas outlet 7.Air inlet 6 and gas outlet 7 are provided with the side of extinction tube body.
Embodiment 4:
In the present embodiment, extinction tube body is S-shaped, remaining is the same as embodiment 3.
It can understand the above description of the embodiments is intended to facilitate those skilled in the art and use practical
It is novel.Person skilled in the art obviously easily can make various modifications to these embodiments, and illustrating herein
General Principle be applied in other embodiments without having to go through creative labor.Therefore, the utility model is not limited to above-mentioned
Embodiment, those skilled in the art's announcement according to the present utility model, do not depart from improvement that the utility model scope is made and
Modification should be all within the protection scope of the utility model.
Claims (8)
1. a kind of extinction pipe, which includes extinction tube body, which is characterized in that the extinction tube body includes at least two
A straight pipe (1) being serially connected, the reflective mirror (2) being arranged between adjacent two straight pipe (1) and setting are straight adjacent two
The central axis of communicating pipe (3) between pipeline section (1), adjacent two straight pipe (1) is not conllinear, the both ends point of the straight pipe (1)
Not She You light inputting end transparent window (4) and light end transparent window (5) out, offer air inlet respectively on the extinction tube body
(6) and gas outlet (7).
2. a kind of extinction pipe according to claim 1, which is characterized in that between adjacent two straight pipe (1) be equipped with one or
More reflective mirrors (2).
3. a kind of extinction pipe according to claim 1, which is characterized in that between the central axis of adjacent two straight pipe (1)
Angle is 0-180 °.
4. a kind of extinction pipe according to claim 3, which is characterized in that adjacent two straight pipe (1) be arranged in a mutually vertical manner or
It is arranged in parallel.
5. a kind of extinction pipe according to claim 1, which is characterized in that the extinction tube body is L-shaped, U-shaped or S
Shape.
6. a kind of extinction pipe according to claim 1, which is characterized in that the air inlet (6) and gas outlet (7) is opened
It is located at the side of extinction tube body.
7. a kind of gas phase molecular absorption spectrometer, which is characterized in that the spectrometer contains as described in any one of claim 1 to 6
Extinction pipe.
8. a kind of gas phase molecular absorption spectrometer according to claim 7, which is characterized in that the spectrometer further includes difference
Light source (8) compatible with the both ends of extinction tube body and detector (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821829046.4U CN209132152U (en) | 2018-11-07 | 2018-11-07 | A kind of extinction pipe and the gas phase molecular absorption spectrometer containing the extinction pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821829046.4U CN209132152U (en) | 2018-11-07 | 2018-11-07 | A kind of extinction pipe and the gas phase molecular absorption spectrometer containing the extinction pipe |
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| Publication Number | Publication Date |
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| CN209132152U true CN209132152U (en) | 2019-07-19 |
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| CN201821829046.4U Active CN209132152U (en) | 2018-11-07 | 2018-11-07 | A kind of extinction pipe and the gas phase molecular absorption spectrometer containing the extinction pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109187397A (en) * | 2018-11-07 | 2019-01-11 | 上海安杰环保科技股份有限公司 | A kind of extinction pipe and the gas phase molecular absorption spectrometer containing the extinction pipe |
-
2018
- 2018-11-07 CN CN201821829046.4U patent/CN209132152U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109187397A (en) * | 2018-11-07 | 2019-01-11 | 上海安杰环保科技股份有限公司 | A kind of extinction pipe and the gas phase molecular absorption spectrometer containing the extinction pipe |
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Address after: 201906 Baoshan District, Shanghai Fu Lian two road 189, 5 buildings, 102 rooms on the first floor. Patentee after: Shanghai Anjie Zhichuang Technology Co.,Ltd. Address before: 201906 Baoshan District, Shanghai Fu Lian two road 189, 5 buildings, 102 rooms on the first floor. Patentee before: SHANGHAI ANJIE ENVIRONMENTAL PROTECTION SCIENCE & TECHNOLOGY Co.,Ltd. |