CN206649002U - A kind of gas chromatograph - Google Patents
A kind of gas chromatograph Download PDFInfo
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- CN206649002U CN206649002U CN201720313889.8U CN201720313889U CN206649002U CN 206649002 U CN206649002 U CN 206649002U CN 201720313889 U CN201720313889 U CN 201720313889U CN 206649002 U CN206649002 U CN 206649002U
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Abstract
The utility model provides a kind of gas chromatograph, including control unit, pretreatment unit, separative element and multi-detector assembled unit, pretreatment unit is connected with separative element, separative element is connected with multi-detector assembled unit, multi-detector assembled unit includes the non-damage type detection part and damage type detection part contacted successively, the outlet of non-damage type detection part is connected with the import of damage type detection part, and the two is smaller than or equal to 10 centimetres, control unit is used to control pretreatment unit, separative element and multi-detector assembled unit, pretreatment unit is used to extract, purifying or enrichment organic matter, separative element is used to separate organic matter.The connection of non-damage type detection part and damage type detection part therebetween is accomplished most short, the deposition of organic gas pipeline between can effectively be reduced, it can reduce because the cold-trap effect of pipeline causes the physicochemical properties of organic gas to change, so that the waveform that detector obtains is more preferable, accuracy of detection is more preferably.
Description
Technical field
The utility model belongs to Analysis of Organic Substances instrument field, and in particular to a kind of gas chromatograph.
Background technology
At present, the universal method that analysis is laboratory is carried out to organic matter using gas chromatography.Gas chromatography uses
Detector species it is various, conventional detector be usually thermal conductivity cell detector, electron capture detector, hydrogen flameionization inspection
Survey device, flame photometric detector and nitrogen phosphorous detector etc..Different detectors is different to the response of inhomogeneous organic matter, generally
In the case of different testing goal just need to use different detectors, such as flame ionization ditector to containing C-H bond
Organic matter response is sensitive, and electron capture detector is sensitive to halogen compounds response, and flame photometric detector vulcanizes to phosphorus to be closed
Thing response is sensitive.Different detectors can be divided into damage type detection part and non-damage type inspection according to the difference of the course of work
Survey part.Wherein, thermal conductivity pool detector and electron capture detector belong to non-damage type detection part, and hydrogen flameionization
Detector and flame photometric detector and nitrogen phosphorous detector belong to damage type detection part.Existing chromatograph generally use list
The method of detector is analyzed.This method requires that experimenter needs to change detector, operating efficiency according to sample
Not high, cost is high.In addition, when gas chromatographic technique is applied in online equipment, the measured parameter of separate unit instrument can be because single
Detector technologies are limited to, when needing to carry out on-line checking to inhomogeneous organic matter, to ensure on-line checking
For rate request, it is necessary to be equipped with more instruments, work is very cumbersome.
Utility model content
The purpose of this utility model is：There is provided a kind of on the premise of accuracy of detection requirement is met, there is provided one kind can
The gas chromatograph that the multiple detectors of single injected sampling detect simultaneously.
To achieve these goals, the technical solution of the utility model is：
A kind of gas chromatograph, including control unit, pretreatment unit, separative element and multi-detector assembled unit, institute
State pretreatment unit with the separative element to be connected, the separative element is connected with the multi-detector assembled unit, described more
Detector combination unit includes the non-damage type detection part and damage type detection part contacted successively, the non-damage type detection
The outlet of part is connected with the import of the damage type detection part, and the two is smaller than or equal to 10 centimetres, the control
Unit is used to control the pretreatment unit, the separative element and the multi-detector assembled unit, the pretreatment unit
For extracting, purifying or be enriched with organic matter, the separative element is used to separate organic matter.
Pretreatment unit in such scheme can be head-space sampler, purge and trap instrument, solid-phase extracting instrument, the micro- extraction of solid phase
Take one kind in instrument, the separative element in such scheme is chromatographic column.
Further, in a kind of preferred embodiment of the utility model, the outlet of the non-damage type detection part
Import with the damage type detection part is connected using pipeline, and the length of the pipeline is 02~0.5 centimetre.
Further, in a kind of preferred embodiment of the utility model, the outlet of the non-damage type detection part
It is connected between import with the damage type detection part using pipeline, the length of the pipeline is 1 centimetre.
Further, in a kind of preferred embodiment of the utility model, the non-damage type detection part with it is described
Damage type detection part is an entirety.
Further, in a kind of preferred embodiment of the utility model, pretreatment unit is head-space sampler, purging
One kind in trapping apparatus, solid-phase extracting instrument, SPME instrument, the separative element are chromatographic column.
Further, in a kind of preferred embodiment of the utility model, the non-damage type detection part is electronics
Acquisition detector, the non-damage type detection part are flame ionization ditector or flame photometric detector.
Further, in a kind of preferred embodiment of the utility model, in addition to protection chamber, the multi-detector group
Close unit to be arranged in the cavity of the protection chamber, the protection chamber is used for the temperature for keeping the multi-detector assembled unit.
Further, in a kind of preferred embodiment of the utility model, the cavity wall of the protection chamber is heat-insulation layer.
Further, in a kind of preferred embodiment of the utility model, the protection chamber also includes heating unit, institute
Heating unit is stated to be distributed on the inside of the cavity wall of the protection chamber.
Further, in a kind of preferred embodiment of the utility model, the heating unit is that resistance wire or PTC are sent out
Thermal element.
The utility model is provided with multi-detector assembled unit, multi-detector assembled unit employ contact successively it is non-broken
The combination of bad type detection part and damage type detection part.The gas come out from separative element first passes around non-damage type inspection
Part is surveyed, then passes through damage type detection part again.The distance between non-damage type detection part and damage type detection part are non-
Chang Jin, when carrying out sample analysis, two detectors can carry out collection of illustrative plates collection simultaneously and preserve data.On the other hand, it is non-
The distance between damage type detection part and damage type detection part are nearer, connection therebetween accomplish it is most short, can be effective
The deposition of organic gas pipeline between is reduced, can be reduced because the cold-trap effect of pipeline causes organic gas
Physicochemical properties change so that the waveform that detector obtains is more preferable, and accuracy of detection is more preferably.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is to more fully understand the utility model, and should not be construed to limitation of the present utility model.For the common skill in this area
For art personnel, on the premise of not paying creative work, other accompanying drawings can also be obtained according to the accompanying drawing of offer.
Fig. 1 is a kind of structural representation of preferred embodiment of the utility model；
Fig. 2 is the structural representation of second of preferred embodiment of the utility model.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the application, it is real below in conjunction with the application
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described implementation
Example only some embodiments of the present application, rather than whole embodiments.
Embodiment one
The present embodiment provides a kind of gas chromatograph, including control unit 1, pretreatment unit 2, separative element 3 and more inspections
Device assembled unit 4 is surveyed, pretreatment unit 2 is connected with separative element 3, and separative element 3 is connected with multi-detector assembled unit 4, more
Detector combination unit 4 includes the non-damage type detection part 41 and damage type detection part 42 contacted successively, non-damage type inspection
The outlet for surveying part 41 is connected with the import of damage type detection part 42, and the two spacing is no more than 1 centimetre, preferably 0.2~0.5
Centimetre, control unit 1 is used to control pretreatment unit 2, separative element 3 and multi-detector assembled unit 4, the pre-treatment list
Member 2 is used to extracting, purify or being enriched with organic matter, and the separative element 3 is used to separate organic matter.
Wherein, pretreatment unit 2 can be in head-space sampler, purge and trap instrument, solid-phase extracting instrument, SPME instrument
One kind.Separative element 3 is chromatographic column, and chromatographic column can be capillary chromatograph or chromatography column.
Multi-detector assembled unit 4 is using the non-damage type detection part 41 and damage type detection part 42 contacted successively
Combination.The gas come out from separative element 3 first passes around non-damage type detection part 41, is then detected again by damage type
Part 42, it is substantially unaffected by the physicochemical property of the organic gas of non-damage type detection part 41.Carry out sample analysis
When, two detectors can carry out collection of illustrative plates collection simultaneously and preserve data.
Because the vent line 43 of detector is very thin, the cooling velocity of vent line 43 quickly, easily forms cold-trap effect,
Physicochemical properties of the organic gas in the relatively low pipeline 43 of temperature easily change.In the present embodiment, non-demolition
The distance between type detection part 41 and damage type detection part 42 require very near.Therebetween distance is nearer, the two it
Between connection do it is shorter, more can reduce cold-trap effect so that detector obtain waveform it is more preferable, accuracy of detection is more preferably.
Embodiment two
Fig. 2 is refer to, the present embodiment and the main distinction of embodiment one are, by non-damage type detection part 41 with breaking
Bad type detection part 42 is fabricated to an entirety, is closely packed together the two.For example by non-damage type detection part 41 and destroy
Only connected between type detection part 42 by an aperture 431, dispense vent line 43 therebetween.Carrier gas is by non-
It can be entered after the core component of destructive detection part by aperture 431 within damage type detection part.It is so to detect more
The ventilation distance of two detection parts in device assembled unit is most short, and Detection results are optimal.
In the above-described embodiment, non-damage type detection part 41 uses electron capture detector ECD, non-damage type detection
Part 41 uses flame ionization ditector FID or flame photometric detector FPD.
In order to preferably avoid because of the waveform loss caused by cold-trap effect caused by the low temperature of vent line 43, the present embodiment
Further preferably include protection chamber 5, multi-detector assembled unit 4 is arranged in the cavity of protection chamber 5, and protection chamber 5 is examined more for keeping
Survey the temperature of device assembled unit 4.Wherein, the cavity wall for protecting chamber 5 is heat-insulation layer.Protection chamber 5 further preferably includes heating unit, heats
Unit is distributed on the inside of the cavity wall of protection chamber 5.Protection chamber 5 can keep the temperature of the pipeline 43 between detector and detector,
Temperature declines caused by preventing pipeline 43 long.General who has surrendered causes the phase of organic gas and flow velocity to become at a temperature of pipeline 43
Change, the waveform that detector obtains does not reach testing requirements.
In order to preferably play insulation effect, the heating unit in the present embodiment is resistance wire or PTC heater elements.
Described above is only the embodiment of the application, it is noted that for the ordinary skill of the art
For personnel, the improvement without creative work made on the premise of the application principle is not departed from all is considered as the application's
Protection domain.
Claims (10)
- A kind of 1. gas chromatograph, it is characterised in that：Including control unit (1), pretreatment unit (2), separative element (3) and more Detector combination unit (4), the pretreatment unit (2) are connected with the separative element (3), the separative element (3) and institute State multi-detector assembled unit (4) to be connected, the multi-detector assembled unit (4) includes the non-damage type test section contacted successively Part (41) and damage type detection part (42), the outlet of the non-damage type detection part (41) and the damage type detection part (42) import is connected, and the two is smaller than or equal to 10 centimetres, and described control unit (1) is used to control the pre-treatment list First (2), the separative element (3) and the multi-detector assembled unit (4), the pretreatment unit (2) are used to extract, purify Or enrichment organic matter, the separative element (3) are used to separate organic matter.
- 2. gas chromatograph according to claim 1, it is characterised in that：The outlet of the non-damage type detection part (41) Be connected between import with the damage type detection part (42) using pipeline (43), the length of the pipeline (43) for 0.2~ 0.5 centimetre.
- 3. gas chromatograph according to claim 1, it is characterised in that：The outlet of the non-damage type detection part (41) It is connected between import with the damage type detection part (42) using pipeline (43), the length of the pipeline (43) is 1 centimetre.
- 4. gas chromatograph according to claim 1, it is characterised in that：The non-damage type detection part (41) with it is described Damage type detection part (42) is an entirety.
- 5. gas chromatograph according to claim 1, it is characterised in that：The pretreatment unit (2) be head-space sampler, One kind in purge and trap instrument, solid-phase extracting instrument, SPME instrument, the separative element (3) are chromatographic column.
- 6. according to the gas chromatograph described in claim 1-5 any one, it is characterised in that：The non-damage type detection part (41) it is electron capture detector, the non-damage type detection part (41) is that flame ionization ditector or flame luminosity are examined Survey device.
- 7. gas chromatograph according to claim 6, it is characterised in that：Also include protection chamber (5), the multi-detector group Close unit (4) to be arranged in the cavity of the protection chamber (5), the protection chamber (5) is used to keep the multi-detector combination single The temperature of first (4).
- 8. gas chromatograph according to claim 7, it is characterised in that：The cavity wall of the protection chamber (5) is heat-insulation layer.
- 9. gas chromatograph according to claim 8, it is characterised in that：The protection chamber (5) also includes heating unit, institute Heating unit is stated to be distributed on the inside of the cavity wall of the protection chamber (5).
- 10. gas chromatograph according to claim 9, it is characterised in that：The heating unit is that resistance wire or PTC generate heat Element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720313889.8U CN206649002U (en) | 2017-03-28 | 2017-03-28 | A kind of gas chromatograph |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720313889.8U CN206649002U (en) | 2017-03-28 | 2017-03-28 | A kind of gas chromatograph |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206649002U true CN206649002U (en) | 2017-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720313889.8U Active CN206649002U (en) | 2017-03-28 | 2017-03-28 | A kind of gas chromatograph |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206649002U (en) |
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2017
- 2017-03-28 CN CN201720313889.8U patent/CN206649002U/en active Active
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