CN103018381A - Automatic control structure for gas chromatograph flame ionization detector air inlet path - Google Patents
Automatic control structure for gas chromatograph flame ionization detector air inlet path Download PDFInfo
- Publication number
- CN103018381A CN103018381A CN2012104830816A CN201210483081A CN103018381A CN 103018381 A CN103018381 A CN 103018381A CN 2012104830816 A CN2012104830816 A CN 2012104830816A CN 201210483081 A CN201210483081 A CN 201210483081A CN 103018381 A CN103018381 A CN 103018381A
- Authority
- CN
- China
- Prior art keywords
- gas
- gas circuit
- automatic control
- air inlet
- flame ionization
- 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.)
- Pending
Links
Images
Landscapes
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention discloses an automatic control structure for a gas chromatograph flame ionization detector air inlet path. The automatic control structure for the gas chromatograph flame ionization detector air inlet path comprises an air path, a hydrogen gas path and a tail gas path, wherein the air path is connected to a detector, and the hydrogen gas path and the tail gas path are connected to the detector together; the automatic control structure for the gas chromatograph flame ionization detector air inlet path is characterized in that air inlets of the three gas paths are provided with filtering elements, air outlet pipelines of the filtering elements are provided with proportional valves, and the air outlet pipelines of the proportional valves are provided with pressure sensors; and the air outlet pipelines of the pressure sensors are provided with restrictors, the restrictors are arranged at the front sections of the air inlets of the detector, and pressure control rings are arranged between the proportional valves and the pressure sensors. According to the automatic control structure for the gas chromatograph flame ionization detector air inlet path provided by the invention, the defects of the traditional gas flow regulating manner that the adjustment is complicated and the accuracy is not high are overcome, the automatic control of the air inlet airflow is realized, and the sensitivity of the detector is guaranteed.
Description
Technical field
The present invention relates to technical field of analytical instruments, specifically just relate to the flame ionization detector in the gas chromatograph, especially flame ionization detector air inlet gas circuit realizes the automatically structure of control.
Background technology
Gas chromatograph is the instrument that material is carried out qualitative and quantitative analysis with vapor-phase chromatography, be used for carrying out analyzing and testing to respectively forming to divide in the mixed gas, gas chromatograph is a kind of separation, analysis tool of many mixture, it is take gas as mobile phase, adopts the column chromatography technology of douche.When the amalyzing substances of many components enters into chromatographic column, because the gas phase of each component in chromatographic column is different with the partition factor between the immobile liquid liquid phase, therefore each component is also just different in the travelling speed of chromatographic column, through behind certain column length, order is left chromatographic column and is entered detecting device, be converted to afterwards after testing electric signal and deliver to the data processing work station, thereby finished the qualitative and quantitative analysis to measured matter.Gas chromatograph is used very wide at aspects such as oil, chemical industry, biological chemistry, medical and health, food industry, environmental protection.It is except being used for quantitatively and the qualitative analysis, can also fixing the physicochemical constants such as partition factor, activity coefficient, molecular weight and specific surface area of going up mutually by working sample.
Gas chromatograph system comprises five large ingredients: air-channel system, sampling system, piece-rate system, temperature control system and detection record system, the control of carrier gas flux directly has influence on the sensitivity of detecting device and the stability of detection signal in its air-channel system.In the detecting device of present gas chromatograph, the most frequently used a kind of detecting device is exactly flame ionization detector, the normal combustion of the hydrogen flame of flame ionization detector is the prerequisite of detecting device normal operation, and therefore hydrogen and combustion air flow being controlled is the important indicator that guarantees the stable raising accuracy of detection of carrier gas flux.
In traditional gas chromatograph flame ionization detector, every road gas all is to be flowed out by steel cylinder first, after reduction valve is depressured to required pressure, make gas purification by the purge drying pipe, again through pressure maintaining valve and spinner-type flowmeter, come adjusting gas flow by the aperture size of manual control mechanical valve, also need to detect gas flow at each several part by special gas meter simultaneously and whether reach normal value, at last with stable pressure, constant flow and the sample mix of gasification, sample gas brought in the chromatographic column separate.This method of operating is more loaded down with trivial details, and the control accuracy of mechanical valve is not high enough simultaneously, and then affects the sensitivity of detecting device or even go out peak area.
Summary of the invention
Technical barrier to be solved by this invention is loaded down with trivial details for the air inlet gas path control method of existing gas chromatograph flame ionization detector, the manual control precision is not high, affect the defective of detector sensitivity, the invention provides gas chromatograph flame ionization detector air inlet gas circuit automatic control structure, realize the automatic control to charge air flow, guaranteed the sensitivity of detecting device.
Technical scheme
In order to solve the problems of the technologies described above, the present invention designs a kind of gas chromatograph flame ionization detector air inlet gas circuit automatic control structure, it comprises the air gas circuit, hydrogen gas circuit and make-up gas? gas circuit, the air gas circuit is received on the detecting device, the hydrogen gas circuit with receive together detecting device after the tail gas gas circuit is connected, it is characterized in that: described three tunnel gas circuit air intake opening places are equipped with filter core, on the filter core outlet pipe proportioning valve is installed, on the proportioning valve outlet pipe pressure transducer is installed, restrictor 8 is installed on the pressure transducer outlet pipe, 8 '; 8 " restrictor is installed in detecting device air intake opening leading portion, and the pressure control loop is housed between described proportioning valve and the pressure transducer.
Described three gas circuit air intake opening gaseous tensions are at 3 kilograms.
Described filter core is metal net mask, and the guard aperture is 0.005～0.010mm.
Described pressure transducer is the Honeywell pressure transducer.
Described restrictor is the vapour lock in 0.0050～0.0010mm aperture.
Beneficial effect
The present invention mainly makes gas flow control finish regulating rotary by simple manual intervention and is changed to and transfers to electronic control part fully and finish, changed the shortcoming that adjusting is loaded down with trivial details, precision is not high that present traditional adjusting gas flow mode exists, selected high-precision pressure transducer, the vapour lock of selecting to be fit to gas with various density and flow range is done restrictor, adopted the miniature precision electromagnetic proportional valve of suitable small-flow gas control, finished the conversion between gaseous tension and the gas flow, realize the automatic control to charge air flow, guaranteed the sensitivity of detecting device.
Description of drawings
Accompanying drawing 1 is structural representation of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described.
As shown in Figure 1, a kind of gas chromatograph flame ionization detector air inlet gas circuit automatic control structure, it comprises air gas circuit 1, hydrogen gas circuit 2 and make-up gas? gas circuit 3, air gas circuit 1 is received on the detecting device 4, hydrogen gas circuit 2 is connected with the tail gas gas circuit and is received together detecting device 4 after connecting, it is characterized in that: described three gas circuit air intake opening places are equipped with filter core 5,5 '; 5 " filter core filter core 5,5 '; 5 " proportioning valve 6 is installed on the outlet pipe, 6 '; 6 " proportioning valve 6,6 '; 6 " pressure transducer 7 is installed on the outlet pipe, 7 '; 7 " pressure transducer 7,7 '; 7 " restrictor 8 is installed on the outlet pipe, 8 '; 8 " restrictor 8,8 '; 8 " be installed in detecting device 4 air intake opening leading portions, described proportioning valve 6,6 '; 6 " with pressure transducer 7,7 '; 7 " between pressure control loop 9 is housed, 9 '; 9 "
Described three gas circuit air intake opening gaseous tensions are at 3 kilograms.
Described filter core 5,5 ', 5 " be metal net mask, the guard aperture is 0.005～0.010mm.
Described pressure transducer 7,7 ', 7 " be the Honeywell pressure transducer.
Described restrictor 8,8 ', 8 " be the vapour lock in 0.0050mm aperture.
The present invention mainly makes gas flow control finish regulating rotary by simple manual intervention and is changed to and transfers to electronic control part fully and finish, changed the shortcoming that adjusting is loaded down with trivial details, precision is not high that present traditional adjusting gas flow mode exists, selected high-precision pressure transducer, the vapour lock of selecting to be fit to gas with various density and flow range is done restrictor, adopted the miniature precision electromagnetic proportional valve of suitable small-flow gas control, finished the conversion between gaseous tension and the gas flow, realize the automatic control to charge air flow, guaranteed the sensitivity of detecting device.
Claims (5)
1. gas chromatograph flame ionization detector air inlet gas circuit automatic control structure, it comprises air gas circuit (1), hydrogen gas circuit (2) and make-up gas? gas circuit (3), air gas circuit (1) is received on the detecting device (4), hydrogen gas circuit (2) is connected 3 with the tail gas gas circuit) receive together detecting device (4) after connecting, it is characterized in that: described three tunnel gas circuit air intake opening places are equipped with filter core (5,5 '; 5 "), filter core filter core (5,5 '; 5 ") proportioning valve (6 is installed on the outlet pipe, 6 '; 6 "), proportioning valve (6,6 '; 6 ") pressure transducer (7 is installed on the outlet pipe, 7 '; 7 "), pressure transducer (7,7 '; 7 ") restrictor (8 is installed on the outlet pipe, 8 '; 8 "), restrictor (8,8 '; 8 ") be installed in detecting device (4) air intake opening leading portion, described proportioning valve (6,6 '; 6 ") and pressure transducer (7,7 '; 7 ") between pressure control loop (9 is housed, 9 '; 9 ").
2. a kind of gas chromatograph flame ionization detector air inlet gas circuit automatic control structure as claimed in claim 1, it is characterized in that: described three tunnel gas circuit air intake opening gaseous tensions are at 3 kilograms.
3. a kind of gas chromatograph flame ionization detector air inlet gas circuit automatic control structure as claimed in claim 1 is characterized in that: and described filter core (5,5 ', 5 ") be metal net mask, the guard aperture is 0.005～0.010mm.
4. a kind of gas chromatograph flame ionization detector air inlet gas circuit automatic control structure as claimed in claim 1 is characterized in that: and described pressure transducer (7,7 ', 7 ") be the Honeywell pressure transducer.
5. a kind of gas chromatograph flame ionization detector air inlet gas circuit automatic control structure as claimed in claim 1 is characterized in that: described restrictor (8,8 ', 8 ") is the vapour lock in 0.0050mm aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104830816A CN103018381A (en) | 2012-11-23 | 2012-11-23 | Automatic control structure for gas chromatograph flame ionization detector air inlet path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104830816A CN103018381A (en) | 2012-11-23 | 2012-11-23 | Automatic control structure for gas chromatograph flame ionization detector air inlet path |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103018381A true CN103018381A (en) | 2013-04-03 |
Family
ID=47967220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104830816A Pending CN103018381A (en) | 2012-11-23 | 2012-11-23 | Automatic control structure for gas chromatograph flame ionization detector air inlet path |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103018381A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112379033A (en) * | 2020-11-26 | 2021-02-19 | 上海天美科学仪器有限公司 | One-control multi-flow-path EPC module for gas chromatograph |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202006017900U1 (en) * | 2006-11-15 | 2007-08-30 | Hidde, Axel R., Dr. | Mixing valve for controlling pressure, temperature and volume of e.g. water, has electronically regulated proportional valve overlaid in magnetically switched or motor regulated valve, where proportional valve has drive unit and periphery |
| CN101769908A (en) * | 2009-03-20 | 2010-07-07 | 上海精密科学仪器有限公司 | Automatic regulating device for flow pressure of gas chromatograph |
| CN101943639A (en) * | 2009-07-10 | 2011-01-12 | 苏州工业园区广福汽保机电设备有限公司 | Method for adjusting gas flow in analysis of automotive tail gas |
| BRPI0905330A2 (en) * | 2009-12-18 | 2011-08-09 | Jacto Maquinas Agricolas | flow control system for agricultural spray nozzles |
| CN202271086U (en) * | 2011-10-14 | 2012-06-13 | 唐山烁宝焊接设备有限公司 | Throttle welder |
| CN202522931U (en) * | 2011-12-01 | 2012-11-07 | 北京北分瑞利分析仪器(集团)有限责任公司 | Gas flow control device |
| CN202903754U (en) * | 2012-11-23 | 2013-04-24 | 上海仪电分析仪器有限公司 | Inlet gas path automatic control structure of flame ionization detector of gas chromatograph |
-
2012
- 2012-11-23 CN CN2012104830816A patent/CN103018381A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202006017900U1 (en) * | 2006-11-15 | 2007-08-30 | Hidde, Axel R., Dr. | Mixing valve for controlling pressure, temperature and volume of e.g. water, has electronically regulated proportional valve overlaid in magnetically switched or motor regulated valve, where proportional valve has drive unit and periphery |
| CN101769908A (en) * | 2009-03-20 | 2010-07-07 | 上海精密科学仪器有限公司 | Automatic regulating device for flow pressure of gas chromatograph |
| CN101943639A (en) * | 2009-07-10 | 2011-01-12 | 苏州工业园区广福汽保机电设备有限公司 | Method for adjusting gas flow in analysis of automotive tail gas |
| BRPI0905330A2 (en) * | 2009-12-18 | 2011-08-09 | Jacto Maquinas Agricolas | flow control system for agricultural spray nozzles |
| CN202271086U (en) * | 2011-10-14 | 2012-06-13 | 唐山烁宝焊接设备有限公司 | Throttle welder |
| CN202522931U (en) * | 2011-12-01 | 2012-11-07 | 北京北分瑞利分析仪器(集团)有限责任公司 | Gas flow control device |
| CN202903754U (en) * | 2012-11-23 | 2013-04-24 | 上海仪电分析仪器有限公司 | Inlet gas path automatic control structure of flame ionization detector of gas chromatograph |
Non-Patent Citations (4)
| Title |
|---|
| 何国琛，等: "气相色谱电子流量/压力控制模块研制和应用", 《光学仪器》, vol. 33, no. 4, 31 August 2011 (2011-08-31), pages 23 - 27 * |
| 崔保健，等: "基于比例阀门的精密气压控制方法研究", 《计算机测量与控制》, vol. 13, no. 12, 31 December 2005 (2005-12-31) * |
| 李娟，等: "高压气体压力及流量控制系统", 《仪表技术与传感器》, no. 5, 31 May 2007 (2007-05-31), pages 35 - 36 * |
| 王福生，等: "一种气体压力控制方法及应用", 《测控技术》, vol. 20, no. 4, 30 April 2001 (2001-04-30) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112379033A (en) * | 2020-11-26 | 2021-02-19 | 上海天美科学仪器有限公司 | One-control multi-flow-path EPC module for gas chromatograph |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105136992B (en) | VOC (Volatile Organic Compound) concentration online monitoring device and VOC concentration online monitoring method thereof | |
| CN102870059B (en) | Flow control system and comprise the monitoring device for detecting airborne analysis thing of described flow control system | |
| CN105136958A (en) | VOC (Volatile Organic Compound) concentration online monitoring device | |
| CN101762653B (en) | Method for determining main phenolic compounds in main stream smoke of cigarette | |
| CN110308216A (en) | The integrated analysis system and its application method of micro permanent foreign gas and water in a kind of gas | |
| CN108333299A (en) | A kind of marine main engine discharges pollutants quick precise testing device and method | |
| CN101329228B (en) | Peroxy acyl radical nitric acid lipid substance sampling system and detection method | |
| CN105911186A (en) | Measurement method of honeysuckle and radix scutellariae granule fingerprint spectrum | |
| CN205067439U (en) | VOCs concentration on -line monitoring device | |
| CN106596439A (en) | Apparatus and method for simultaneously measuring nitrous acid, ozone and nitrogen dioxide in air | |
| CN102539558B (en) | Method for measuring hydrogen sulfide in mainstream cigarette smoke | |
| CN110007026A (en) | Trace nitrogen oxides detection method and device in a kind of atmosphere | |
| CN109459519A (en) | The method for quickly measuring benzene homologues and aldehyde ketone substance in synthetic material simultaneously | |
| CN202903754U (en) | Inlet gas path automatic control structure of flame ionization detector of gas chromatograph | |
| US20080168752A1 (en) | Separating particulate-containing gas flow into particulate and non-particulate flow portions | |
| CN202041512U (en) | Analysis device | |
| CN110895266B (en) | Analysis device and method for measuring content of hydrogen sulfide and phosphine | |
| CN103018381A (en) | Automatic control structure for gas chromatograph flame ionization detector air inlet path | |
| CN101959580A (en) | Apparatus system and method for mass analysis of a sample | |
| CN110376324A (en) | Utilize the method and gas chromatograph of flame ionization ditector measurement oxygen concentration | |
| CN207096187U (en) | Chromatographic system | |
| Cheng et al. | Using a micro sampler on a drone to extract organic vapors—A case study of monitoring industrial pollution | |
| CN206515230U (en) | It is a kind of at the same measure air in nitrous acid, ozone, the equipment of nitrogen dioxide | |
| CN104764826A (en) | Method for determining content of cotinine in urine | |
| CN209296659U (en) | A kind of analytical equipment for non-methane total hydrocarbons in VOC |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130403 |