CN110082453A - Photoionization detector - Google Patents
Photoionization detector Download PDFInfo
- Publication number
- CN110082453A CN110082453A CN201910438440.8A CN201910438440A CN110082453A CN 110082453 A CN110082453 A CN 110082453A CN 201910438440 A CN201910438440 A CN 201910438440A CN 110082453 A CN110082453 A CN 110082453A
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- Prior art keywords
- hole
- loophole
- ionization
- partition
- photoionization detector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000005192 partition Methods 0.000 claims abstract description 23
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 15
- 230000007480 spreading Effects 0.000 claims description 22
- 238000003892 spreading Methods 0.000 claims description 22
- 238000010943 off-gassing Methods 0.000 claims description 20
- 238000012360 testing method Methods 0.000 claims description 13
- 230000005611 electricity Effects 0.000 claims description 6
- 238000003491 array Methods 0.000 claims description 2
- 238000009792 diffusion process Methods 0.000 claims 1
- 239000004744 fabric Substances 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 6
- 238000004587 chromatography analysis Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 14
- 238000001514 detection method Methods 0.000 description 8
- 238000009826 distribution Methods 0.000 description 5
- 230000005684 electric field Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/62—Detectors specially adapted therefor
- G01N30/64—Electrical detectors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/62—Detectors specially adapted therefor
- G01N30/64—Electrical detectors
- G01N2030/642—Electrical detectors photoionisation detectors
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The present invention relates to gas chromatographic analysis apparatus fields, provide a kind of photoionization detector.The detector includes the ionization source from top to bottom set gradually, partition, control circuit board and pedestal；The two sides of control circuit board are printed with polarizing electrode and receiving electrode with its circuit connection respectively, ionization channels are equipped between polarizing electrode and receiving electrode, the first through hole being connected to ionization channels is offered on polarizing electrode, receiving electrode offers the second through-hole being connected to ionization channels；Offer loophole and outlet conduit on partition, loophole and first through hole and the second through-hole are coaxially disposed, and one end of outlet conduit is connected to loophole, the other end extends to the edge of partition；Pedestal is equipped with the inlet channel being connected to the second through-hole, is equipped with chromatographic column in inlet channel.The sensitivity and accuracy of detector not only greatly improved in the present invention, avoids the problem of line loss causes current signal to be decayed, and compact-sized, small in size, flexibly convenient.
Description
Technical field
The present invention relates to gas chromatographic analysis apparatus field more particularly to a kind of photoionization detectors.
Background technique
Photoionization detector (Photoionization Detector, hereinafter referred to as PID) is a kind of simultaneous choosing of versatility
The detector of selecting property.PID uses the vacuum UV lamp with specific ionization energy to bombard indoor gas molecule is ionized,
The organic molecule ionization contained in gas smashes into positively charged ion and electronegative electronics, in the outer power-up that electrode generates
Ion, which is moved on electrode, under the action of forms weak current.Since tested gas concentration and weak current are linear,
Therefore, by detection current value it can be seen that the concentration of detected gas.
The electrode of existing PID usually passes through conducting wire and connect with controller.Electrode will by conducting wire after receiving current signal
Faint current signal is transmitted to signal amplification and the processing circuit of controller.Due to the presence of line loss, current signal is logical
Decaying can be generated during crossing wire transmission, and then causes testing result inaccurate.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
A kind of the object of the present invention is to provide structures photoionization detector simple, small in size, with solve existing light from
The big problem of the signal transmission attenuation of sonization detector.
To achieve the above object, the present invention provides a kind of photoionization detector, the detector include from top to bottom according to
Ionization source, partition, control circuit board and the pedestal of secondary setting；The two sides of the control circuit board are printed with respectively to be connected with its circuit
The polarizing electrode and receiving electrode connect is equipped with ionization channels, the polarization electricity between the polarizing electrode and the receiving electrode
Offer the first through hole being connected to the ionization channels on extremely, the receiving electrode is offered to be connected to the ionization channels
Second through-hole；The bulkhead cover is located on the polarizing electrode, and loophole and outlet conduit are offered on the partition, described
Unthreaded hole and the first through hole and second through-hole are coaxially disposed, one end of the outlet conduit is connected to the loophole,
The other end extends to the edge of the partition；The ionization source is for passing sequentially through the loophole and the first through hole to institute
The under test gas stated in ionization channels is ionized；The pedestal is equipped with the inlet channel being connected to second through-hole, institute
It states and is equipped with chromatographic column in inlet channel.
Wherein, the partition is equipped with outgassing groove, and the loophole is set to the bottom surface of the outgassing groove, the outlet conduit
It is connected to the outgassing groove.
Wherein, the quantity of the loophole is multiple, and the control circuit board is equipped with the multiple and loophole one by one
The corresponding first through hole and second through-hole.
Wherein, multiple loophole circular array distributions.
Wherein, the partition with a thickness of 0.2~1mm, the circular in cross-section of the outgassing groove, the outgassing groove it is straight
Diameter is 3~10mm.
Wherein, the diameter of the loophole, the first through hole and second through-hole is equal.
Wherein, the diameter of the first through hole is 0.1~2mm, and the depth of ionization channels is 0.2~2mm.
Wherein, the ionization source is vacuum UV lamp.
Wherein, the inlet channel includes spreading grooves and the receiving hole for plugging the chromatographic column, the pedestal court
Spreading grooves are equipped with to the side of the control circuit board, one end of the receiving hole is connected to the bottom surface of the spreading grooves, is another
The pedestal is run through at end, and the cross sectional dimensions of the spreading grooves is greater than the cross sectional dimensions of the receiving hole.
Wherein, the circular in cross-section of the spreading grooves, the depth of the spreading grooves are 1~3mm, the spreading grooves it is straight
Diameter is 4~10mm.
Polarizing electrode, receiving electrode and ionization channels by being integrated in control circuit board by the present invention, in detection process
The circuit that the electric current of generation can be directly transferred in control circuit board amplifies processing without by wire transmission to control
Device processed, and then the sensitivity and accuracy of detector greatly improved, avoiding line loss leads to current signal decaying in turn
The problem of influencing testing result.In addition, the detector in the present invention is more compact compared to existing detector structure, overall volume
It is smaller, it is more flexible convenient in use.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description simply to be introduced, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the perspective view of the explosion of one of embodiment of the present invention photoionization detector；
Fig. 2 is the schematic top plan view of control circuit board in the embodiment of the present invention；
Fig. 3 is the elevational schematic view of control circuit board in the embodiment of the present invention；
Fig. 4 is the signal response intensity figure that the present invention is obtained when detecting 0.1ppb toluene.
Appended drawing reference:
1, vacuum UV lamp；2, partition；2.1, loophole；2.2, outlet conduit；
2.3, outgassing groove；3, control circuit board；3.1, polarizing electrode；
3.1.1., first through hole；3.2, receiving electrode；3.2.1, the second through-hole；4, pedestal；
4.1, spreading grooves；5, chromatographic column；
Specific embodiment
To keep the purposes, technical schemes and advantages of invention clearer, below in conjunction with the attached drawing in invention, in invention
Technical solution be explicitly described, it is clear that described embodiment is invention a part of the embodiment, rather than whole realities
Apply example.It is obtained by those of ordinary skill in the art without making creative efforts based on the embodiment in invention
Every other embodiment belongs to the range of invention protection.
In the description of the present invention, unless otherwise indicated, the orientation or positional relationship of the instructions such as term " on ", "lower" is base
In orientation or positional relationship shown in the drawings, it is merely for convenience of description of the present invention and simplification of the description, rather than indication or suggestion
Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this
The limitation of invention.
It should be noted that unless otherwise clearly defined and limited, term " connection " shall be understood in a broad sense, for example, can
To be to be fixedly connected, may be a detachable connection, or be integrally connected；It can be directly connected, intermediate matchmaker can also be passed through
Jie is indirectly connected.For the ordinary skill in the art, tool of the above-mentioned term in invention can be understood with concrete condition
Body meaning.
In conjunction with shown in Fig. 1 to Fig. 3, present embodiments provide a kind of photoionization detector, the detector include by up to
Under the ionization source, partition 2, control circuit board 3 and the pedestal 4 that set gradually；The two sides of control circuit board 3 are printed with and its electricity respectively
The polarizing electrode 3.1 and receiving electrode 3.2 that road connects and is oppositely arranged are equipped with electricity between polarizing electrode 3.1 and receiving electrode 3.2
From channel, the first through hole 3.1.1 being connected to ionization channels is offered on polarizing electrode 3.1, receiving electrode 3.2 offers and electricity
The second through-hole 3.2.1 from channel connection；The lid of partition 2 is located on polarizing electrode 3.1, and loophole 2.1 is offered on partition 2 and is gone out
Air drain road 2.2, loophole 2.1 and first through hole 3.1.1 and the second through-hole 3.2.1 are coaxially disposed, one end of outlet conduit 2.2 with
The connection of loophole 2.1, the other end extend to the edge of partition 2；Ionization source is for passing sequentially through loophole 2.1 and first through hole
3.1.1 the under test gas in ionization channels is ionized；Pedestal 4 is equipped with the inlet channel being connected to the second through-hole 3.2.1,
Chromatographic column 5 is equipped in inlet channel.Wherein, ionization source can be, but not limited to be vacuum UV lamp 1.
Below by taking vacuum UV lamp 1 as an example, by the optical window of vacuum UV lamp 1 towards partition 2 when installation, and make partition 2
Loophole 2.1 is located in the optical path of vacuum UV lamp 1.
When detection: control circuit board 3 being connected to external power supply, so that polarizing electrode 3.1 and receiving electrode 3.2 pass through control
The circuit of circuit board 3 processed is connected to form electric field with the positive and negative anodes of external power supply respectively.In detection process, 5 effluent of chromatographic column is
Under test gas enters ionization channels by the second through-hole 3.2.1 under the carrying of carrier gas.At this point, the purple that vacuum UV lamp 1 issues
Outer light passes sequentially through loophole 2.1 and first through hole 3.1.1 is shining into ionization channels, into ionization channels under test gas in vacuum
It is ionized under the irradiation of ultraviolet lamp 1, that is to say, that vacuum UV lamp 1 bangs the under test gas molecule in ionization channels
It hits, the organic molecule ionization contained under test gas is smashed into positively charged ion and electronegative electronics.Due to ionization
Channel is located in the electric field that polarizing electrode 3.1 and receiving electrode 3.2 are formed, therefore ionizes the electronics generated and cation in electric field
Driving under can be migrated respectively to polarizing electrode 3.1 and receiving electrode 3.2 and then generate electric current.Again due to 3.1 He of polarizing electrode
Receiving electrode 3.2 is directly printed in control circuit board 3, therefore the electric current that electric field generates can be directly transferred to control circuit board 3
Circuit amplify processing without by wire transmission to controller, and then can be it is avoided that leading to electricity because of line loss
The problem of signal decays and then influences testing result is flowed, so that the sensitivity and accuracy of detection just can be improved.For example, such as Fig. 4
Shown, testing staff has found after detecting 0.1ppb using the detector in the present embodiment, and the detector is utilized to detect under test gas
The 1-2 order of magnitude is improved compared to existing detector sensitivity when concentration, and signal reaction is rapid, signal strength is strong, detection
As a result accurate.
As it can be seen that the detector is by being integrated in control circuit board 3 for polarizing electrode 3.1, receiving electrode 3.2 and ionization channels
On, the circuit that the electric current generated in detection process can be directly transferred to control circuit board 3 amplifies processing without passing through
The sensitivity and accuracy of detector greatly improved to controller in wire transmission, and avoiding line loss leads to electric current
The problem of signal decays and then influences testing result.In addition, the detector in the present embodiment is more compared to existing detector structure
Step up to gather, overall volume is smaller, more flexible convenient in use.
Preferably, partition 2 is equipped with outgassing groove 2.3, and loophole 2.1 is set to the bottom surface of outgassing groove 2.3, outlet conduit 2.2
It is connected to outgassing groove 2.3.Further, the quantity of loophole 2.1 is multiple, and control circuit board 3 is equipped with multiple and loophole
2.1 one-to-one first through hole 3.1.1 and the second through-hole 3.2.1.The advantages of this arrangement are as follows: on the one hand, it can increase very
Range of exposures of the empty ultraviolet lamp 1 in ionization channels, further increases the sensitivity and accuracy of detection；It on the other hand, can letter
Change the exhaust structure on partition 2, specifically: since multiple loopholes 2.1 are arranged at the bottom surface of outgassing groove 2.3, outgassing groove 2.3
It is connected to outlet conduit 2.2, therefore can unify to lead to after ionized gas enters outgassing groove 2.3 by each loophole 2.1
Cross the discharge of outlet conduit 2.2.
Further, multiple 2.1 circular array of loophole distributions.Wherein, the quantity of loophole 2.1 can with but it is unlimited
In being 1~20.Due to, first through hole 3.1.1 and the second through-hole 3.2.1 are arranged in a one-to-one correspondence with loophole 2.1, that is,
It says, first through hole 3.1.1 and the second through-hole 3.2.1 is identical as the quantity of loophole 2.1, position is corresponding, each first through hole
3.1.1 coaxial with the second through-hole 3.2.1 and corresponding loophole 2.1, therefore when multiple 2.1 circular arrays of loophole are distributed
When, multiple first through hole 3.1.1, multiple second through-hole 3.2.1 on receiving electrode 3.2 on polarizing electrode 3.1 are in a ring
Array distribution.Certainly, it should be noted that loophole 2.1, first through hole 3.1.1 and the second through-hole 3.2.1 be it is multiple when in addition to
It, can also rectangular array distribution or random distribution other than being distributed with circular array.
Preferably, partition 2 with a thickness of 0.2~1mm, the circular in cross-section of outgassing groove 2.3, the diameter of outgassing groove 2.3
For 3~10mm.Certainly, the cross-sectional shape of outgassing groove 2.3 is not limited to circle, such as can also be rectangle, triangle, ellipse
Etc. other shapes.
Preferably, for the ease of manufacture, the diameter of loophole 2.1, first through hole 3.1.1 and the second through-hole 3.2.1 is equal.
Wherein, the diameter of first through hole 3.1.1 is 0.1~2mm, and the depth of ionization channels is 0.2~2mm.
Preferably, polarizing electrode 3.1 and the plating of 3.2 surface of receiving electrode are equipped with golden film, to increase polarizing electrode 3.1 and receive
The electric field strength that electrode 3.2 generates.
Furthermore, it is contemplated that the diameter of chromatographic column 5 is smaller, in order to increase the gas to be measured that the unit time enters ionization channels
The flow of body, inlet channel include spreading grooves 4.1 and the receiving hole for plugging chromatographic column 5, and pedestal 4 is towards control circuit board
3 side is equipped with spreading grooves 4.1, and one end of receiving hole is connected to the bottom surface of spreading grooves 4.1, the other end is through pedestal 4, spreading grooves
4.1 cross sectional dimensions is greater than the cross sectional dimensions of receiving hole.Preferably, the circular in cross-section of spreading grooves 4.1, spreading grooves
4.1 depth is 1~3mm, and the diameter of spreading grooves 4.1 is 4~10mm.Certainly, it should be noted that spreading grooves 4.1 it is transversal
Face shape can also be the other shapes such as rectangle, triangle or ellipse other than it can be circle.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of invention, rather than its limitations；Although ginseng
Invention is described in detail according to previous embodiment, those skilled in the art should understand that: it still can be right
Technical solution documented by foregoing embodiments is modified or equivalent replacement of some of the technical features；And this
It modifies or replaces, the spirit and scope for each embodiment technical solution of invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of photoionization detector, which is characterized in that including the ionization source, partition, control electricity from top to bottom set gradually
Road plate and pedestal；The two sides of the control circuit board are printed with polarizing electrode and receiving electrode with its circuit connection, institute respectively
It states and is equipped with ionization channels between polarizing electrode and the receiving electrode, offer on the polarizing electrode and connect with the ionization channels
Logical first through hole, the receiving electrode offer the second through-hole being connected to the ionization channels；The bulkhead cover is located at institute
It states on polarizing electrode, offers loophole and outlet conduit on the partition, the loophole and the first through hole and described
The coaxial arrangement of second through-hole, one end of the outlet conduit is connected to the loophole, the other end extends to the side of the partition
Edge；The ionization source for pass sequentially through the loophole and the first through hole to the under test gas in the ionization channels into
Row ionization；The pedestal is equipped with the inlet channel being connected to second through-hole, is equipped with chromatographic column in the inlet channel.
2. photoionization detector according to claim 1, which is characterized in that the partition is equipped with outgassing groove, described
Loophole is set to the bottom surface of the outgassing groove, and the outlet conduit is connected to the outgassing groove.
3. photoionization detector according to claim 2, which is characterized in that the quantity of the loophole is multiple, institute
It states control circuit board and is equipped with the multiple and loophole first through hole and second through-hole correspondingly.
4. photoionization detector according to claim 3, which is characterized in that multiple loophole circular arrays point
Cloth.
5. photoionization detector according to claim 2, which is characterized in that the partition with a thickness of 0.2~1mm,
The circular in cross-section of the outgassing groove, the diameter of the outgassing groove are 3~10mm.
6. photoionization detector according to claim 1, which is characterized in that the loophole, the first through hole and
The diameter of second through-hole is equal.
7. photoionization detector according to claim 1, which is characterized in that the diameter of the first through hole be 0.1~
2mm, the depth of ionization channels are 0.2~2mm.
8. photoionization detector according to claim 1, which is characterized in that the ionization source is vacuum UV lamp.
9. photoionization detector according to any one of claims 1 to 8, which is characterized in that the inlet channel includes
Spreading grooves and receiving hole for plugging the chromatographic column, the pedestal are equipped with diffusion towards the side of the control circuit board
Slot, one end of the receiving hole is connected to the bottom surface of the spreading grooves, the other end is through the pedestal, the spreading grooves it is transversal
Face size is greater than the cross sectional dimensions of the receiving hole.
10. photoionization detector according to claim 9, which is characterized in that the circular in cross-section of the spreading grooves,
The depth of the spreading grooves is 1~3mm, and the diameter of the spreading grooves is 4~10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910438440.8A CN110082453B (en) | 2019-05-24 | 2019-05-24 | Photoionization detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910438440.8A CN110082453B (en) | 2019-05-24 | 2019-05-24 | Photoionization detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110082453A true CN110082453A (en) | 2019-08-02 |
| CN110082453B CN110082453B (en) | 2024-07-12 |
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ID=67421652
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910438440.8A Active CN110082453B (en) | 2019-05-24 | 2019-05-24 | Photoionization detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115201316A (en) * | 2021-04-12 | 2022-10-18 | 纳华环境有限公司 | Photoionization device with improved linearity and stability |
| CN117420195A (en) * | 2023-12-18 | 2024-01-19 | 天津安科达科技有限公司 | Fixed type photoion detection system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006012777A1 (en) * | 2004-08-06 | 2006-02-09 | Rae Systems (Shanghai) Inc. | An integrated photoionization sensor |
| CN102662018A (en) * | 2010-11-30 | 2012-09-12 | 中国科学院大连化学物理研究所 | Photo ionization detector |
| CN105675710A (en) * | 2016-04-05 | 2016-06-15 | 深圳市诺安环境安全股份有限公司 | Ionization chamber and photoionization sensor |
| US20180059058A1 (en) * | 2016-08-24 | 2018-03-01 | The Regents Of The University Of Michigan | Miniaturized Discharge Photo-Ionization Detector |
| CN210109047U (en) * | 2019-05-24 | 2020-02-21 | 北京市劳动保护科学研究所 | Photoionization detector |
-
2019
- 2019-05-24 CN CN201910438440.8A patent/CN110082453B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006012777A1 (en) * | 2004-08-06 | 2006-02-09 | Rae Systems (Shanghai) Inc. | An integrated photoionization sensor |
| CN102662018A (en) * | 2010-11-30 | 2012-09-12 | 中国科学院大连化学物理研究所 | Photo ionization detector |
| CN105675710A (en) * | 2016-04-05 | 2016-06-15 | 深圳市诺安环境安全股份有限公司 | Ionization chamber and photoionization sensor |
| US20180059058A1 (en) * | 2016-08-24 | 2018-03-01 | The Regents Of The University Of Michigan | Miniaturized Discharge Photo-Ionization Detector |
| CN210109047U (en) * | 2019-05-24 | 2020-02-21 | 北京市劳动保护科学研究所 | Photoionization detector |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115201316A (en) * | 2021-04-12 | 2022-10-18 | 纳华环境有限公司 | Photoionization device with improved linearity and stability |
| CN117420195A (en) * | 2023-12-18 | 2024-01-19 | 天津安科达科技有限公司 | Fixed type photoion detection system and method |
| CN117420195B (en) * | 2023-12-18 | 2024-03-19 | 天津安科达科技有限公司 | Fixed type photoion detection system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110082453B (en) | 2024-07-12 |
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