CN203455323U - Electron capture detector - Google Patents
Electron capture detector Download PDFInfo
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- CN203455323U CN203455323U CN201320577399.0U CN201320577399U CN203455323U CN 203455323 U CN203455323 U CN 203455323U CN 201320577399 U CN201320577399 U CN 201320577399U CN 203455323 U CN203455323 U CN 203455323U
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- anode
- negative electrode
- radioactive source
- cathode
- amplifier
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Abstract
The utility model provides an electron capture detector, comprising an anode and a cathode, wherein the cathode and a polytetrafluoroethylene film form a cavity; an air inlet is formed in the cathode; an air outlet is formed between the cathode and the polytetrafluoroethylene film; the anode penetrates through the polytetrafluoroethylene film, and the lower part of the anode is positioned in the cavity; the anode is electrically connected with an amplifier through a lead; the cathode is electrically connected with a power supply through a lead; the power supply is electrically connected with the amplifier through a lead; the amplifier is connected with a recorder. The electron capture detector is characterized in that a cylindrical radioactive source is arranged in the cathode and is positioned on the inner wall of the cathode, the lower part of the anode is positioned at the central axis of the radioactive source, and a coating with the activity of 6-10mCi/cm<2> is arranged on the radioactive source. The electron capture detector provided by the utility model overcomes such defects of a conventional product as unstable detector base current, high oxidation rate and high falling rate, caused by quality problems; and the sensitivity is improved.
Description
Technical field
The utility model belongs to checkout equipment field, relates in particular to a kind of electron capture detector (ECD).
Background technology
Electron capture detector (ECD) is the highest gas chromatography detector of sensitivity, is again the selective detector occurring the earliest simultaneously.It only can trapped electrons to those compound, as halogenated hydrocarbons, have response containing heteroatomic compounds such as N, O and S.Because it is highly sensitive, selectivity is good, be widely used in for many years the analysis of trace agricultural chemicals, polychlorinated biphenyl etc. in environmental sample.But due to quality problems, there is unstable, oxidizable, the caducous shortcoming of base flow in conventional electrical catcher.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provides a kind of electron capture detector (ECD), comprise anode, negative electrode, polytetrafluoroethylene film, power supply, amplifier and register, described negative electrode and polytetrafluoroethylene film surround a cavity, described negative electrode is provided with air intake opening, between described negative electrode and polytetrafluoroethylene film, be provided with gas outlet, described anode runs through described polytetrafluoroethylene film, its underpart is positioned at described cavity, described anode is connected with described amplifier electric by wire, described negative electrode is electrically connected to described power supply by wire, described power supply is connected with described amplifier electric by wire, described amplifier is connected with described register, it is characterized in that being provided with in described negative electrode the radioactive source of tubular, described radioactive source is positioned on described negative electrode inwall, described anode bottom is positioned at described radioactive source axis place, it is 6-10mCi/cm2 coating that described radioactive source is provided with activity.
Described coating adopts and filters 5 times or 5 above purifying electroplate liquids.
The beneficial effects of the utility model are: the radioactive source that tubular is set in negative electrode, anode bottom is positioned at radioactive source axis place, it is 6-10mCi/cm2 coating that radioactive source is provided with activity, in electroplating process, coating adopts and filters 5 times or 5 above purifying electroplate liquids, make the utility model solve unstable, oxidizable, the caducous shortcoming of detecting device base flow that conventional products quality problems cause, improved basic sensitivity.When the utility model is used, when flow rate of carrier gas is not less than 6ml/min, detect best results.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described further:
In figure, 1, anode; 2, negative electrode; 3, polytetrafluoroethylene film; 4, power supply; 5, amplifier; 6, register; 7, radioactive source.
As shown in Figure 1, negative electrode 2 and polytetrafluoroethylene film 3 surround a cavity, negative electrode 2 is provided with air intake opening, 3 of negative electrode 2 and polytetrafluoroethylene films are provided with gas outlet, anode 1 runs through polytetrafluoroethylene film 3, its underpart is positioned at cavity, anode 1 is electrically connected to amplifier 5 by wire, negative electrode 2 is electrically connected to power supply 4 by wire, power supply 4 is electrically connected to amplifier 5 by wire, amplifier 5 is connected with register 6, in negative electrode 2, be provided with the radioactive source 7 of tubular, radioactive source 7 is positioned on negative electrode 2 inwalls, anode 1 bottom is positioned at radioactive source 7 axis places, it is 6-10mCi/cm2 coating that radioactive source 7 is provided with activity, coating adopts and filters 5 times or 5 above purifying electroplate liquids plating.
By embodiment, to of the present utility model, have been described in detail above, but described content is only preferred embodiment of the present utility model, can not be considered to for limiting practical range of the present utility model.All equalization variations of doing according to the utility model application range and improvement etc., within all should still belonging to patent covering scope of the present utility model.
Claims (2)
1. electron capture detector (ECD), comprise anode (1), negative electrode (2), polytetrafluoroethylene film (3), power supply (4), amplifier (5) and register (6), described negative electrode (2) and polytetrafluoroethylene film (3) surround a cavity, described negative electrode (2) is provided with air intake opening, between described negative electrode (2) and polytetrafluoroethylene film (3), be provided with gas outlet, described anode (1) runs through described polytetrafluoroethylene film (3), its underpart is positioned at described cavity, described anode (1) is electrically connected to described amplifier (5) by wire, described negative electrode (2) is electrically connected to described power supply (4) by wire, described power supply (4) is electrically connected to described amplifier (5) by wire, described amplifier (5) is connected with described register (6), it is characterized in that being provided with in described negative electrode (2) radioactive source (7) of tubular, described radioactive source (7) is positioned on described negative electrode (2) inwall, described anode (1) bottom is positioned at described radioactive source (7) axis place, it is 6-10mCi/cm2 coating that described radioactive source (7) is provided with activity.
2. electron capture detector (ECD) as claimed in claim 1, is characterized in that described coating adopts the purifying Shen plating solutions that filter more than 5 times or 5 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320577399.0U CN203455323U (en) | 2013-09-18 | 2013-09-18 | Electron capture detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320577399.0U CN203455323U (en) | 2013-09-18 | 2013-09-18 | Electron capture detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203455323U true CN203455323U (en) | 2014-02-26 |
Family
ID=50135189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320577399.0U Expired - Fee Related CN203455323U (en) | 2013-09-18 | 2013-09-18 | Electron capture detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203455323U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105891396A (en) * | 2015-01-02 | 2016-08-24 | 山东鲁南瑞虹化工仪器有限公司 | Electric fishing detector lining device of gas chromatograph |
| CN110554126A (en) * | 2019-10-21 | 2019-12-10 | 江苏天瑞仪器股份有限公司 | electron capture detector and gas phase device |
-
2013
- 2013-09-18 CN CN201320577399.0U patent/CN203455323U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105891396A (en) * | 2015-01-02 | 2016-08-24 | 山东鲁南瑞虹化工仪器有限公司 | Electric fishing detector lining device of gas chromatograph |
| CN110554126A (en) * | 2019-10-21 | 2019-12-10 | 江苏天瑞仪器股份有限公司 | electron capture detector and gas phase device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140226 Termination date: 20150918 |
|
| EXPY | Termination of patent right or utility model |