CN204462087U - For the fast gas chromatograph of determination and analysis sample - Google Patents
For the fast gas chromatograph of determination and analysis sample Download PDFInfo
- Publication number
- CN204462087U CN204462087U CN201520065722.5U CN201520065722U CN204462087U CN 204462087 U CN204462087 U CN 204462087U CN 201520065722 U CN201520065722 U CN 201520065722U CN 204462087 U CN204462087 U CN 204462087U
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- Prior art keywords
- chromatograph
- metal tube
- capillary
- capillary chromatograph
- constant temperature
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- 238000004458 analytical method Methods 0.000 title claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 63
- 229910052751 metal Inorganic materials 0.000 claims abstract description 63
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000004642 Polyimide Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000003463 adsorbent Substances 0.000 claims description 3
- -1 and inside it Substances 0.000 claims description 3
- 239000005350 fused silica glass Substances 0.000 claims description 3
- 229920001721 polyimide Polymers 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 238000004587 chromatography analysis Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000013138 pruning Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000036962 time dependent Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
Abstract
The utility model discloses the fast gas chromatograph for determination and analysis sample, comprise injector, capillary chromatograph, constant temperature conductance cell, metal tube, entrance, outlet, power supply, electrical connection pipeline, thermopair, air-cooled shell and detecting device; Injector is positioned at above constant temperature conductance cell, and one end of capillary chromatograph is connected with injector, can immerse in constant temperature conductance cell and eliminate cold spot; Capillary chromatograph is introduced into the round metal tube being arranged in air-cooled shell; Metal tube is heated by heating resistor, is provided with entrance and exit, and entrance and exit is connected to by electrical connection pipeline the power supply comprising a temperature sensor being positioned at air-cooled shell side; The temperature of capillary chromatograph can by thermocouple measurement; The output terminal of capillary chromatograph is connected to independently detecting device flexibly through outlet.
Description
Technical field
The utility model relates to sample detection analysis, has the fast gas chromatograph related to for determination and analysis sample.
Background technology
Gas chromatograph (GC) is a center analysis technology, has a wide range of applications in environmental monitoring field; When being especially combined with mass spectrometer, its sensitivity, selectivity and sample identification ability can be improved.
But GC is as a powerful analysis tool, and the time cycle that traditional GC analyzes a sample is generally 30 ~ 60 minutes; In addition, be only limitted to detection that is stable and volatile compound with the gas chromatograph being provided with the routine that standard colour chart standard (being generally 30m) and standard column flow velocity (as 1ml/min) combine, and thermal instability compound may cannot make low voc compounds wash-out from capillary chromatograph owing to crossing thermal degradation.
Therefore, in view of standard GC analyzes length consuming time, structure is comparatively complicated, needs a kind of fast GC of the efficiency for improving determination and analysis badly, meanwhile, has and chromatography column is rapidly heated the simple equipment of structure of heating and cooling efficiency.
Utility model content
For the problems referred to above, the purpose of this utility model is to provide the fast gas chromatograph for determination and analysis sample, solves the technical matters that standard GC analyzes length consuming time and installs chromatographic column inconvenience.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: for the fast gas chromatograph of determination and analysis sample, comprises injector, capillary chromatograph, constant temperature conductance cell, metal tube, power supply, electrical connection pipeline, thermopair, air-cooled shell and detecting device.
Sample manually or auto injection mode inject the injector be positioned at above constant temperature conductance cell, injector is connected with one end of capillary chromatograph; Capillary chromatograph is made up of the fused quartz kapillary of high flexibility polyimide coating, and inside it, coating has adsorbent thin film; Therefore, capillary chromatograph can immerse in constant temperature conductance cell, and then is heated to and has with thrower and detecting device the temperature matched, to eliminate the cold spot of capillary chromatograph.
Capillary chromatograph is introduced in metal tube, and metal tube is positioned at air-cooled shell, is diametrically the circular structure of 12cm, so that capillary chromatograph inserts in metal tube simply and easily, capillary chromatograph can be free to slide and enter in metal tube; Therefore, capillary chromatograph can push easily or pull out from metal tube, and operator with lower cost and can replace capillary chromatograph more quickly; Meanwhile, capillary chromatograph can enter in constant temperature conductance cell with the curve of smoothness.
The connected mode of capillary chromatograph and metal tube, for flexibly connecting but not being rigidly connected, can be used for most standard GC.
Metal tube is provided with an entrance and an outlet, and the end of entrance and exit is processed into the fillet surface of 60 °, damages metal tube when inserting metal tube to prevent capillary chromatograph; Metal tube can be resistively heated, and entrance and exit is connected to power supply by electrical connection pipeline.
Power supply is positioned at air-cooled shell side, and comprising a temperature sensor provides a time dependent temperature program(me) with feedback temperature.
The temperature of capillary chromatograph can by thermocouple measurement, and one end of thermopair is connected with power supply, and the other end and metal tube touch.
The heating resistor of metal tube is positioned at air-cooled shell, and air-cooled shell is positioned at above constant temperature conductance cell.
The entrance and exit of metal tube is positioned at the top edge position of constant temperature conductance cell, and therefore, the part metals pipe being positioned at constant temperature conductance cell inside can not be heated; Resistance heated part is positioned at the outside of constant temperature conductance cell to avoid or significantly to reduce the double heat caused by constant temperature conductance cell and resistance heated metal tube, and then avoids this heat to cause the focus part of capillary chromatograph to be heated excessively; Meanwhile, the capillary chromatograph between resistance heated metal tube and constant temperature conductance cell is avoided to there is cold spot; In temperature-rise period, the focus of capillary chromatograph and all can not temporarily or forever existing of cold spot, this is the life cycle due to focus reduction capillary chromatograph, causes the local damage of post separation membrane, and then focus need be avoided overheated to protect Kapton; The shape that cold spot affects chromatographic peak, the wash-out producing tailed peak, postpone peak or prevention low volatility analysis thing; Therefore, the position at entrance and exit place and design are to make focus and cold spot minimize.
The output terminal of capillary chromatograph is through outlet and be connected to independently detecting device flexibly, and described detecting device can be any standard GC detecting device, such as flame ionic detector or have the mass spectrometer of ultrasonic molecular beam.
The difference of the utility model the utility model and other fast gas chromatographs, namely one of its principal character is capillary column and metal tube is soft connection, but not be rigidly connected, therefore, capillary column can be free to slide and enter in metal tube, and then capillary column can push or from metal tube pull-out, operator can replace capillary column with lower cost.Insert simply and easily in metal tube for the ease of capillary column, the rounded structure of shell of metal tube, therefore, capillary chromatograph enters in constant temperature conductance cell with the curve of smoothness.Further, when capillary chromatograph is replaced, a part for the standard capillary column that only length need be used to be 30m is as replacement part, when standard capillary column is cut into capillary chromatograph, the length of capillary chromatograph is 2.5m, 1.5m is only had to be placed in metal tube, remainder connects injector and detecting device, metal tube makes when capillary chromatograph changed by needs or capillary chromatograph lost efficacy, the profile of metal tube still remains unchanged, and does not need as traditional GC again extremely consistent with the shape of constant temperature conductance cell around capillary column; So user can select any capillary column of several giant manufacturers to be on the market arranged in fast GC.Pollute if capillary chromatograph input end is subject to low volatility sample matrices, capillary chromatography column length is selected to carry out pollution abatement flexibly by regularly pruning capillary chromatograph, in addition, also can simple operations capillary chromatograph is inserted injector and detecting device, there is very strong practicality.
Accompanying drawing explanation
Fig. 1 is the utility model schematic diagram.
Wherein: injector 1, capillary chromatograph 2, constant temperature conductance cell 3, metal tube 4, entrance 5, outlet 6, power supply 7, electrical connection pipeline 8, thermopair 9, air-cooled shell 10, detecting device 11.
Embodiment
Below in conjunction with the embodiment described by accompanying drawing, the utility model is described in further detail.
For the fast gas chromatograph of determination and analysis sample, as shown be fast gas chromatograph (GC) schematic diagram, comprise injector 1, capillary chromatograph 2, constant temperature conductance cell 3, metal tube 4, power supply 7, electrical connection pipeline 8, thermopair 9, air-cooled shell 10 and detecting device 11.
Sample manually or auto injection mode inject the injector 1 be positioned at above constant temperature conductance cell 3, injector 1 is connected with one end of capillary chromatograph 2; Capillary chromatograph 2 is made up of the fused quartz kapillary of high flexibility polyimide coating, and inside it, coating has adsorbent thin film; Therefore, capillary chromatograph 2 can immerse in constant temperature conductance cell 3, and then is heated to and has the temperature matched, to eliminate the cold spot of capillary chromatograph 2 with thrower (depending on going out) and detecting device.
Capillary chromatograph 2 is introduced in metal tube 4, and metal tube 4 is positioned at air-cooled shell 10, is diametrically the circular structure of 12cm, so that capillary chromatograph 2 inserts in metal tube 4 simply and easily, capillary chromatograph 2 can be free to slide and enter in metal tube 4; Therefore, capillary chromatograph 2 can push easily or pull out from metal tube 4, and operator can replace capillary chromatograph 2 with lower cost with more quickly; Meanwhile, capillary chromatograph 2 can enter in constant temperature conductance cell 3 with the curve of smoothness.
The connected mode of capillary chromatograph and metal tube, for flexibly connecting but not being rigidly connected, can be used for most standard GC.
Metal tube 4 is provided with an entrance 5 and an outlet 6, and the end of entrance 5 and outlet 6 is processed into the fillet surface of 60 °, damages metal tube 4 when inserting metal tube 4 to prevent capillary chromatograph 2.
Metal tube 4 can be resistively heated, and entrance 5 and outlet 6 are connected to power supply 7 by electrical connection pipeline 8.
Power supply 7 is positioned at air-cooled shell 10 side, comprises a temperature sensor to provide a time dependent temperature program(me) (depending on going out) with feedback temperature;
Capillary chromatograph 2 temperature can be measured by thermopair 9, and one end of thermopair 9 is connected with power supply 7, and the other end and metal tube 4 touch.
The heating resistor of metal tube 4 is positioned at air-cooled shell 10, and air-cooled shell 10 is positioned at above standard GC constant temperature conductance cell 3.
The entrance 5 of metal tube 4 and outlet 6 are positioned at the top edge position of constant temperature conductance cell 3, and therefore, the part metals pipe 4 being positioned at constant temperature conductance cell 3 inside can not be heated; Resistance heated part is positioned at the outside of constant temperature conductance cell 3 to avoid or significantly to reduce the double heat caused by constant temperature conductance cell 3 and resistance heated metal tube 4, and then avoids this heat to cause the focus part of capillary chromatograph 2 to be heated excessively; Meanwhile, the capillary chromatograph 2 between resistance heated metal tube 4 and GC constant temperature conductance cell 3 is avoided to there is non-heating part (cold spot); In temperature-rise period, the focus of capillary chromatograph 2 and all can not temporarily or forever existing of cold spot, this is the life cycle due to focus reduction capillary chromatograph 2, causes the local damage of post separation membrane, and then focus need be avoided overheated to protect Kapton; The shape that cold spot affects chromatographic peak, the wash-out producing tailed peak, postpone peak or prevention low volatility analysis thing; Therefore, the position at entrance 5 and outlet 6 places and design are to make focus and cold spot minimize.
The output terminal of capillary chromatograph 2 is through outlet 6 and be connected to independently thermal detector 11 flexibly, and described thermal detector 11 can be any standard GC detecting device, such as flame ionic detector or there is ultrasonic molecular beam) mass spectrometer.
The difference of the utility model and other fast gas chromatographs, namely one of its principal character is capillary chromatograph 2 and metal tube 4 is soft connection, but not is rigidly connected, and therefore, capillary chromatograph 2 can be free to slide and enter in metal tube 4.Therefore, capillary chromatograph 2 can push or pull out from metal tube 4, and therefore, operator can replace capillary chromatograph 2 with lower cost.Insert simply and easily in metal tube 4 for the ease of capillary column 2, the rounded structure of shell of quick metal tube 4, therefore, capillary chromatograph 2 enters in constant temperature conductance cell 3 with the curve of smoothness., in addition, entrance 5 and outlet 6 ends are processed into the fillet surface of 60 °, damage metal tube 4 when inserting metal tube 4 to prevent capillary chromatograph 2.Further, one end of capillary chromatograph 2 is connected with injector 1, and the other end is connected with detecting device 11; When capillary chromatograph 2 is replaced, a part for the standard capillary chromatograph that only length need be used to be 30m is as replacement part, when standard capillary column is cut into capillary chromatograph 2, the length of capillary chromatograph 2 is 2.5m, 1.5m is only had to be placed in metal tube 4, remainder connects injector 1 and thermal detector 11, metal tube 4 makes when capillary chromatograph 2 changed by needs or capillary chromatograph 2 lost efficacy, the profile of metal tube 4 still remains unchanged, and does not need as traditional GC again extremely consistent with the shape of GC constant temperature oven around capillary chromatograph; So user can select any capillary column of several giant manufacturers to be on the market arranged in fast GC.Pollute if capillary chromatograph 2 input end is subject to low volatility sample matrices, pollution abatement is carried out to select capillary chromatograph 2 length flexibly by regularly pruning capillary chromatograph 2, in addition, also can simple operations capillary chromatograph 2 is inserted injector 1 and detecting device 11.
Claims (3)
1. for the fast gas chromatograph of determination and analysis sample, it is characterized in that: comprise
-injector, capillary chromatograph, constant temperature conductance cell, metal tube, power supply, electrical connection pipeline, thermopair, air-cooled shell and detecting device;
Described injector is positioned on constant temperature conductance cell, is connected with one end of capillary chromatograph, and capillary chromatograph immerses in constant temperature conductance cell and is heated to the temperature matched with detecting device, to eliminate the cold spot of capillary chromatograph;
Described capillary chromatograph is introduced into the round metal tube being arranged in air-cooled shell, and metal tube is by being positioned at the heating resistor heating of air-cooled shell, and air-cooled shell is positioned at above constant temperature conductance cell; Heating resistor part is positioned at the outside of constant temperature conductance cell;
Described metal tube is provided with an entrance and an outlet, and entrance and exit is connected to power supply respectively by electrical connection pipeline; Entrance and exit is positioned at the top edge position of constant temperature conductance cell;
The output terminal of described capillary chromatograph through outlet be connected to independently detecting device with determination and analysis sample composition.
2. the fast gas chromatograph for determination and analysis sample according to claim 1, is characterized in that: described capillary chromatograph is made up of the fused quartz kapillary of high flexibility polyimide coating, and inside it, coating has the capillary chromatograph of adsorbent thin film; Described capillary chromatograph heats up by the heating resistor of metal tube; Described detecting device is flame ionic detector or the mass spectrometer with ultrasonic molecular beam.
3. the fast gas chromatograph for determination and analysis sample according to claim 1, is characterized in that: the end of described entrance and exit is the fillet surface of 60 °; The diameter of described metal tube is 12cm; The connected mode of described capillary chromatograph and metal tube is for flexibly connecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520065722.5U CN204462087U (en) | 2015-01-29 | 2015-01-29 | For the fast gas chromatograph of determination and analysis sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520065722.5U CN204462087U (en) | 2015-01-29 | 2015-01-29 | For the fast gas chromatograph of determination and analysis sample |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204462087U true CN204462087U (en) | 2015-07-08 |
Family
ID=53668956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520065722.5U Expired - Fee Related CN204462087U (en) | 2015-01-29 | 2015-01-29 | For the fast gas chromatograph of determination and analysis sample |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204462087U (en) |
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2015
- 2015-01-29 CN CN201520065722.5U patent/CN204462087U/en not_active Expired - Fee Related
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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: 20150708 Termination date: 20160129 |
|
| EXPY | Termination of patent right or utility model |