CN114705789B - Gas chromatography device for laboratory detection - Google Patents
Gas chromatography device for laboratory detection Download PDFInfo
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- CN114705789B CN114705789B CN202210626917.7A CN202210626917A CN114705789B CN 114705789 B CN114705789 B CN 114705789B CN 202210626917 A CN202210626917 A CN 202210626917A CN 114705789 B CN114705789 B CN 114705789B
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- 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
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- 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
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
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- 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
- G01N2030/022—Column chromatography characterised by the kind of separation mechanism
- G01N2030/025—Gas chromatography
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Abstract
The invention relates to a gas chromatography device for laboratory detection, which comprises a sample feeding box and a detection box, wherein the sample feeding box and the detection box are separately arranged, the sample feeding box comprises a liquid inlet and a gasification chamber communicated with the liquid inlet and used for gasifying liquid to be detected, the sample feeding box further comprises a first gas inlet externally connected with a gas source and a gas outlet connected with the detection box, the detection box is provided with a second gas inlet connected with the gas outlet, the detection box is provided with an electric connection end externally connected with a power supply, the detection box further comprises a separation chamber and a detection chamber, the second gas inlet is communicated with the separation chamber, the separation chamber is communicated with the detection chamber, the first gas inlet is communicated with a gas-carrying pipeline in the sample feeding box, and the gas-carrying pipeline is communicated with the gasification chamber. The invention facilitates the detection of a laboratory, the sample introduction and the detection can be carried out in different scenes, and the flexibility of the laboratory detection is improved.
Description
Technical Field
The invention relates to the technical field of laboratory detection equipment, in particular to a gas chromatography device for laboratory detection.
Background
The gas chromatograph is an instrument for qualitatively and quantitatively analyzing a multi-component complex mixture by using a chromatographic separation technology and a detection technology. The method can be used for analyzing heat-stable organic matters with the boiling point not more than 500 ℃ in soil, such as volatile organic matters, organic chlorine, organic phosphorus, polycyclic aromatic hydrocarbons, phthalate esters and the like.
When the gas chromatograph in the prior art is used, because the temperature control accuracy is poor, and the installation of advancing kind and detection is fixed, the efficiency and the detection accuracy that lead to detecting reduce, so need to develop a gas chromatograph device for laboratory detection to solve the problem among the prior art urgently.
Disclosure of Invention
The invention aims to solve the technical problem of providing a gas chromatography device for laboratory detection, which is convenient for laboratory detection, sample introduction and detection can be carried out in different scenes, and the flexibility of laboratory detection is improved.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a laboratory detects uses gas chromatography device, includes sampling box and detection case, sampling box and detection case separation set up, sampling box includes the inlet to and with the vaporizer of the liquid gasification that will await measuring of inlet intercommunication, sampling box still includes the first air inlet of external air supply and the gas outlet of being connected with the detection case, be equipped with the second air inlet of being connected with the gas outlet on the detection case, be equipped with external power supply's the end of connecting electricity on the detection case, the detection case still includes separation chamber and detection room, second air inlet and separation chamber intercommunication, separation chamber and detection room intercommunication, first air inlet and the airborne pipeline intercommunication of sampling box, airborne pipeline and vaporizer intercommunication.
In addition, a gasification pipe is arranged in the gasification chamber, a plurality of heating rings are arranged on the periphery of the gasification pipe, the heating rings are externally connected with heating branch pipes, the heating branch pipes are connected with heating main pipes, and the heating branch pipes are provided with on-off switches. Through laying the vaporizer in the vaporizer to establish a plurality of heating ring in the periphery of vaporizer, can carry out the segmentation heating to the vaporizer through the heating ring, realize controlling the temperature to the vaporizer segmentation, carry out different heating intensification in different positions and handle, in addition, establish the on-off switch on the heating branch pipe, can control respectively each heating ring, improved the accurate nature of control.
Secondly, the heating rings are arranged at intervals along the length direction of the gasification pipe. Through making the heating ring set up along vaporizing tube length direction interval, so can make the heating of vaporizing tube more even.
Moreover, the gasification pipes are arranged in an S shape in the gasification chamber, and the heating rings on the adjacent gasification pipes are arranged in a staggered mode. By the S-shaped arrangement of the gasification tubes in the gasification chamber, the efficiency and quality of the gasification heating can be improved.
Preferably, the gap between the heating rings on the adjacent gasification pipes is m1, and 0cm < m1 is less than or equal to 2 cm. So can guarantee that the heat is more concentrated, raise the thermal efficiency.
Preferably, the length of the protruding part of the staggered part of the adjacent gasification pipes is m2, and the length of the protruding part is more than 0cm and less than or equal to m2 and less than or equal to 5 cm. So can guarantee that the heat is more concentrated, raise the thermal efficiency.
Preferably, a column chamber is arranged in the separation chamber, a temperature control module is arranged in the column chamber, the temperature control module is of a filling body structure, a plurality of chromatographic columns are arranged in the temperature control module, a plurality of placing cavities for the chromatographic columns to be placed are arranged in the temperature control module, and a plurality of heating rings are arranged in the periphery of the placing cavities in the temperature control module. The periphery of each chromatographic column is provided with the heating ring, so that accurate temperature control of the chromatographic columns is realized.
Preferably, a heating jacket is arranged in the temperature control module and on the periphery of the heating ring. The heating sleeve is arranged on the periphery of the heating ring in the temperature control module, so that accurate temperature control of the chromatographic column is realized.
Preferably, the inner bottom of the placing cavity is provided with a first piston, the upper end of the first piston is provided with a piston shaft, one end of the piston shaft, which is far away from the first piston, is provided with a second piston, and the second piston is provided with a cushion pad. Through set up first piston, piston shaft and second piston at the interior bottom of placing the chamber, so improved the stability of chromatographic column installation.
Preferably, a spring is arranged between the first piston and the second piston and sleeved on the periphery of the piston shaft. Through being equipped with the spring between first piston and second piston, utilize the elastic restoring force of spring, realized the buffering to the chromatographic column installation, effectively improved the stability of chromatographic column installation.
The beneficial effects of the invention are as follows: the method comprises the steps of enabling a liquid sample to be detected to enter a gasification chamber through a liquid inlet, enabling an air inlet to input inert gas of an air source into an internal gas-carrying pipeline after gasification treatment in the gasification chamber, inputting the gasified sample into the gas-carrying pipeline and conveying the gasified sample into a detection box, separating each component in the sample by a separation chamber in the detection box, converting the concentration or quality (content) of each component separated by a chromatographic column into an electric signal (such as voltage, current and the like) which is easy to measure by the detection chamber, and processing the signal, wherein the detection chamber usually comprises a detection element, an amplifier and a digital-to-analog converter. The components separated by the chromatographic column enter a detection chamber in sequence, are converted into corresponding electric signals according to the change of the concentration or the quality of the components along with time, and are recorded and displayed after being amplified to draw a chromatogram. Because the sample introduction box and the detection box are separately arranged, the detection of a laboratory is facilitated, the sample introduction and the detection can be carried out under different scenes, and the detection flexibility of the laboratory is improved.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic view showing the structure of a gas chromatography apparatus for laboratory testing according to the present invention;
FIG. 2 is a schematic view showing a structure of a part of a vaporizing tube in a gas chromatograph device for laboratory testing according to the present invention;
FIG. 3 is a schematic view showing the structure of a vaporizer tube of the gas chromatograph device for laboratory tests according to the present invention;
FIG. 4 is a schematic view showing the structure of a column chamber in the gas chromatography apparatus for laboratory test according to the present invention;
FIG. 5 is a partial cross-sectional view of a column chamber of the gas chromatography apparatus for laboratory tests according to the present invention;
wherein, 1, a sample injection box; 101. a liquid inlet; 102. an observation window; 103. a fixed mount; 104. a first air inlet; 105. an air outlet; 106. a gasification chamber; 2. a detection box; 201. a separation chamber; 202. a detection chamber; 203. a second air inlet; 204. connecting an electric terminal; 205. a display screen; 301. heating the main pipe; 302. heating the branch pipe; 303. a heating ring; 304. a gasification pipe; 305. an on-off switch; 2011. a column chamber; 2012. a temperature control module; 2013. a chromatographic column; 2014. a placement chamber; 2015. a cushion pad; 2016. a second piston; 2017. a piston shaft; 2018. a spring; 2019. a first piston.
Detailed Description
The invention will now be further described with reference to the accompanying drawings. These drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1-5, the gas chromatography device for laboratory detection according to the present invention comprises a sample box 1 and a detection box 2, the sample feeding box 1 and the detection box 2 are separately arranged, the sample feeding box 1 comprises a liquid inlet 101, and a gasification chamber 106 communicated with the liquid inlet 101 and used for gasifying the liquid to be tested, the sample box 1 further comprises a first gas inlet 104 externally connected with a gas source and a gas outlet 105 connected with the detection box 2, the detection box 2 is provided with a second air inlet 203 connected with the air outlet 105, the detection box 2 is provided with an electric connection end 204 of an external power supply, the detection box 2 further comprises a separation chamber 201 and a detection chamber 202, the second air inlet 203 is communicated with the separation chamber 201, the separation chamber 201 is communicated with the detection chamber 202, the first air inlet 104 is communicated with an air-borne pipeline in the sample injection box 1, and the air-borne pipeline is communicated with the gasification chamber 106. When the device is used, a liquid sample to be detected enters the gasification chamber 106 through the liquid inlet 101, after the gasification treatment is performed in the gasification chamber 106, the inert gas of a gas source is input into the internal gas-carrying pipeline through the gas inlet, the gasified sample is input into the gas-carrying pipeline and is conveyed into the detection box 2, each component in the sample is separated through the separation chamber 201 in the detection box 2, then the concentration or the quality (content) of each component separated through the chromatographic column 2013 is converted into an electrical signal (such as voltage, current and the like) which is easy to measure through the detection chamber 202, and the signal processing is performed, wherein the detection chamber 202 generally comprises three parts, namely a detection element, an amplifier and a digital-to-analog converter. The components separated by the chromatographic column 2013 enter the detection chamber 202 in sequence, are converted into corresponding electric signals according to the change of the concentration or the quality of the components along with the time, and are recorded and displayed after being amplified to draw a chromatogram. Because the sample introduction box 1 and the detection box 2 are separately arranged, the detection of a laboratory is facilitated, sample introduction and detection can be carried out under different scenes, and the flexibility of laboratory detection is improved.
In this embodiment, a gasification pipe 304 is arranged in the gasification chamber 106, a plurality of heating rings 303 are arranged on the periphery of the gasification pipe 304, the heating rings 303 are all externally connected with heating branch pipes 302, the heating branch pipes 302 are all connected with a heating main pipe 301, and the heating branch pipes 302 are provided with on-off switches 305. Through laying gasification pipe 304 in gasification chamber 106 to establish a plurality of heating ring 303 in gasification pipe 304's periphery, can carry out the segmentation heating to gasification pipe 304 through heating ring 303, realize controlling the temperature to gasification pipe 304 segmentation, carry out different heating intensification processing in the position of difference, in addition, establish on-off switch 305 on heating branch pipe 302, can control respectively each heating ring 303, improved the accurate nature of control.
In this embodiment, the heating rings 303 are spaced along the length of the vaporizing tube 304. By providing the heating rings 303 spaced along the length of the vaporizer tube 304, it is possible to improve the uniformity of heating of the vaporizer tube 304.
In the present embodiment, the gasification tubes 304 are arranged in an S-shape in the gasification chamber 106, and the heating rings 303 of adjacent gasification tubes 304 are staggered. By forming the gasification tubes 304 in an S-shaped arrangement within the gasification chamber 106, this may improve the efficiency and quality of the gasification heating.
In the embodiment, the gap between the heating rings 303 on the adjacent gasification pipes 304 is m1, and m1 is more than 0cm and less than or equal to 2 cm. So can guarantee that the heat is more concentrated, raise the thermal efficiency. It will be appreciated that in this implementation, m1 is 1 cm.
In the present embodiment, the length of the protruding part of the interlaced part of the adjacent gasification tubes 304 is m2, and 0cm < m2 ≦ 5 cm. So can guarantee that the heat is more concentrated, raise the thermal efficiency. It will be appreciated that in this embodiment m2 is 2.5 cm.
In this embodiment, be equipped with post room 2011 in the separation chamber 201, be equipped with temperature control module 2012 in the post room 2011, temperature control module 2012 is the obturator structure, be equipped with a plurality of chromatographic columns 2013 in the temperature control module 2012, be equipped with the chamber 2014 of placing that a plurality of confession chromatographic column 2013 placed in the temperature control module 2012, the periphery that just is located the chamber 2014 of placing in the temperature control module 2012 is equipped with a plurality of heating circle. By arranging the heating ring at the periphery of each chromatographic column 2013, accurate temperature control of the chromatographic columns 2013 is realized.
In this embodiment, a heating jacket is disposed in the temperature control module 2012 and at the periphery of the heating ring. The accurate temperature control of the chromatographic column 2013 is realized by arranging the heating sleeve at the periphery of the heating ring in the temperature control module 2012.
In this embodiment, a first piston 2019 is disposed at the bottom inside the placing cavity 2014, a piston shaft 2017 is disposed at the upper end of the first piston 2019, a second piston 2016 is disposed at one end of the piston shaft 2017 far away from the first piston 2019, and a cushion 2015 is disposed on the second piston 2016. By providing the first piston 2019, the piston shaft 2017 and the second piston 2016 in the interior bottom of the storage cavity 2014, the stability of the column 2013 is improved.
In the present embodiment, a spring 2018 is provided between the first piston 2019 and the second piston 2016, and the spring 2018 is fitted around the outer periphery of the piston shaft 2017. By arranging the spring 2018 between the first piston 2019 and the second piston 2016, the installation of the chromatographic column 2013 is buffered by the elastic restoring force of the spring 2018, and the installation stability of the chromatographic column 2013 is effectively improved.
It will be appreciated that the sample introduction box 1 is provided with an observation window 102 for facilitating observation of the internal workings of the sample introduction box 1.
It will be appreciated that a display screen 205 is provided on the detection chamber 202 to facilitate viewing of data.
It can be understood that the sample injection box 1 and the detection box 2 are both provided with a fixing frame 103 on one side. The sample injection box 1 and the detection box 2 are conveniently fixed.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. A gas chromatography device for laboratory detection is characterized in that: the liquid detection device comprises a sample feeding box and a detection box, wherein the sample feeding box and the detection box are arranged in a separated mode, the sample feeding box comprises a liquid inlet and a gasification chamber communicated with the liquid inlet and used for gasifying liquid to be detected, the sample feeding box further comprises a first gas inlet of an external gas source and a gas outlet connected with the detection box, a second gas inlet connected with the gas outlet is formed in the detection box, a power connection end of an external power supply is formed in the detection box, the detection box further comprises a separation chamber and a detection chamber, the second gas inlet is communicated with the separation chamber, the separation chamber is communicated with the detection chamber, the first gas inlet is communicated with a gas-carrying pipeline in the sample feeding box, and the gas-carrying pipeline is communicated with the gasification chamber;
a gasification pipe is arranged in the gasification chamber, a plurality of heating rings are arranged on the periphery of the gasification pipe, the heating rings are externally connected with heating branch pipes, the heating branch pipes are connected with a heating main pipe, and on-off switches are arranged on the heating branch pipes;
the heating rings are arranged at intervals along the length direction of the gasification pipe;
the gasification pipes are arranged in an S shape in the gasification chamber, and the heating rings on the adjacent gasification pipes are arranged in a staggered way;
the gap between the heating rings on the adjacent gasification pipes is m1, and m1 is more than 0cm and less than or equal to 2 cm;
the length of the protruding part of the staggered part of the adjacent gasification pipes is m2, and m2 is more than 0cm and less than or equal to 5 cm.
2. The gas chromatography device for laboratory testing according to claim 1, wherein: the separation chamber is internally provided with a column chamber, the column chamber is internally provided with a temperature control module, the temperature control module is of a filling body structure, the temperature control module is internally provided with a plurality of chromatographic columns, the temperature control module is internally provided with a plurality of placing cavities for the chromatographic columns to place, and the periphery in the temperature control module and in the placing cavities is provided with a plurality of heating rings.
3. The gas chromatography device for laboratory testing according to claim 2, wherein: and a heating sleeve is arranged in the temperature control module and positioned at the periphery of the heating ring.
4. The gas chromatography device for laboratory testing according to claim 2, wherein: the inner bottom of the placing cavity is provided with a first piston, the upper end of the first piston is provided with a piston shaft, one end, far away from the first piston, of the piston shaft is provided with a second piston, and the second piston is provided with a cushion pad.
5. The gas chromatography apparatus for laboratory tests according to claim 4, wherein: and a spring is arranged between the first piston and the second piston and sleeved on the periphery of the piston shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210626917.7A CN114705789B (en) | 2022-06-06 | 2022-06-06 | Gas chromatography device for laboratory detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210626917.7A CN114705789B (en) | 2022-06-06 | 2022-06-06 | Gas chromatography device for laboratory detection |
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| CN114705789A CN114705789A (en) | 2022-07-05 |
| CN114705789B true CN114705789B (en) | 2022-09-02 |
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| Application Number | Title | Priority Date | Filing Date |
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Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3370173B2 (en) * | 1994-02-20 | 2003-01-27 | 株式会社エステック | Vaporization flow controller |
| JP3370174B2 (en) * | 1994-02-20 | 2003-01-27 | 株式会社エステック | Liquid material vaporizer |
| JPH07287000A (en) * | 1994-04-20 | 1995-10-31 | Shimadzu Corp | Sample vaporization chamber for gaschromatograph |
| AU2003217530A1 (en) * | 2002-04-01 | 2003-10-13 | Ans Inc | Apparatus and method for depositing organic matter of vapor phase |
| JP2005113221A (en) * | 2003-10-08 | 2005-04-28 | Lintec Co Ltd | Vaporizer, and liquid vaporization feeder using the same |
| JP4433392B2 (en) * | 2004-04-19 | 2010-03-17 | 創研工業株式会社 | Vaporizer |
| KR100855582B1 (en) * | 2007-01-12 | 2008-09-03 | 삼성전자주식회사 | Liquid supplying unit and method, facility for treating substrates with the unit, and method for treating substrates |
| JP5545023B2 (en) * | 2010-05-14 | 2014-07-09 | 株式会社島津製作所 | Gas chromatograph mass spectrometer |
| JP2012162754A (en) * | 2011-02-03 | 2012-08-30 | Ulvac Japan Ltd | Vaporization method and vaporizer of liquid material |
| JP2016117937A (en) * | 2014-12-22 | 2016-06-30 | 株式会社堀場エステック | Heating type vaporization device |
| CN211732377U (en) * | 2019-12-30 | 2020-10-23 | 兰州中科安泰分析科技有限责任公司 | Chromatographic column placing box convenient to transport |
| CN212159709U (en) * | 2020-05-03 | 2020-12-15 | 天津维智精细化工有限公司 | Sample introduction device for gas chromatograph |
| CN214085564U (en) * | 2020-12-25 | 2021-08-31 | 思凡(上海)石油设备有限公司 | Gas chromatograph chromatographic column protection architecture |
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