CN215727945U - Oxygen analysis system for measuring medical and aviation respiration by gas chromatography - Google Patents
Oxygen analysis system for measuring medical and aviation respiration by gas chromatography Download PDFInfo
- Publication number
- CN215727945U CN215727945U CN202121984777.8U CN202121984777U CN215727945U CN 215727945 U CN215727945 U CN 215727945U CN 202121984777 U CN202121984777 U CN 202121984777U CN 215727945 U CN215727945 U CN 215727945U
- Authority
- CN
- China
- Prior art keywords
- interface
- way valve
- chromatographic column
- valve
- oxygen
- 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.)
- Active
Links
Images
Landscapes
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The utility model relates to an oxygen analysis system for measuring medical and aviation respiration by gas chromatography, which comprises: the first ten-way valve is respectively connected with the twenty-way valve and the six-way valve, a sixth interface and a ninth interface of the first ten-way valve are both connected with the first chromatographic column, and the eighth interface is connected with the first hydrogen flame ionization detector through the second chromatographic column; the twentieth valve is connected with the dew point transmitter, the sixth interface and the ninth interface are connected with the third chromatographic column, and the eighth interface, the fourth chromatographic column, the methane conversion device and the second hydrogen flame ionization detector are sequentially connected; the fourth interface and the seventh interface of the ten-way valve group are both connected with the carrier gas, the fifth interface is connected with the first gas inlet, and the third interface and the ten interfaces are both connected with the first quantitative ring; the first interface and the fourth interface of the six-way valve are both connected with the second quantitative ring, the second interface is connected with the carrier gas, the third interface is connected with the thermal conductivity cell detector through the fifth chromatographic column, and the fifth interface is connected with the sample gas inlet. The utility model can automatically detect the content of total hydrocarbon, carbon monoxide, carbon dioxide, dew point and oxygen in oxygen for medical and aviation breathing.
Description
Technical Field
The utility model relates to the field of gas chromatography analysis, in particular to an analysis system for measuring oxygen for medical and aviation respiration by using gas chromatography.
Background
The oxygen for medical and aviation breathing needs to detect the contents of oxygen, carbon monoxide, carbon dioxide, moisture and total hydrocarbon according to the technical requirements of GB8982-2009, two analysis modes are adopted, copper ammonia solution is used for analyzing and detecting the oxygen content, gas chromatography is used for analyzing and detecting the contents of carbon monoxide, carbon dioxide and total hydrocarbon, a dew point instrument is used for analyzing and detecting the moisture, the operation is extremely inconvenient, and the copper ammonia solution is manually analyzed, so that a large analysis error exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an analysis system for measuring oxygen for medical and aviation respiration by using a gas chromatography, so as to realize automatic sampling, analysis and detection of total hydrocarbon, carbon monoxide, carbon dioxide, dew point and oxygen component content in the oxygen for medical and aviation respiration.
In order to achieve the purpose, the utility model provides the following scheme:
an analytical system for determining oxygen for medical and aviation breathing by gas chromatography, comprising: the device comprises an automatic switching valve group, two first quantitative rings, a second quantitative ring, a first chromatographic column, a second chromatographic column, a third chromatographic column, a fourth chromatographic column, a fifth chromatographic column, a first hydrogen flame ionization detector, a second hydrogen flame ionization detector, a thermal conductivity cell detector, a methane conversion device and a dew point transmitter;
the automatic switching valve group comprises a ten-way valve group and a six-way valve; the ten-way valve group comprises a first ten-way valve and a twentieth-way valve; the interfaces of the automatic switching valve group are named from the beginning according to a clockwise or anticlockwise sequence from any interface;
the first port of the first ten-way valve is connected with the sixth port of the six-way valve; the second interface of the first ten-way valve is connected with the first interface of the twentieth-way valve; the ninth interface of the first ten-way valve is connected with the sixth interface of the first ten-way valve through a first chromatographic column; the eighth interface of the first ten-way valve is connected with the first hydrogen flame ionization detector through a second chromatographic column;
a second interface of the twentieth valve is connected with the dew point transmitter; a ninth interface of the twenty-first valve is connected with a sixth interface of the twenty-second valve through a third chromatographic column; the eighth interface of the twenty-first valve, the fourth chromatographic column, the methane conversion device and the second hydrogen flame ionization detector are sequentially connected;
the fourth interface and the seventh interface of the ten-way valve group are both connected with carrier gas; a fifth interface of the ten-way valve group is connected with the first air inlet; a tenth port of the ten-way valve block is connected with a third port of the ten-way valve block through the first quantitative ring;
the first interface of the six-way valve is connected with the fourth interface of the six-way valve through the second quantitative ring; the second interface of the six-way valve is connected with carrier gas; the third interface of the six-way valve is connected with the thermal conductivity cell detector through the fifth chromatographic column; and a fifth interface of the six-way valve is connected with the sample gas inlet.
Optionally, the first inlet port is a needle valve inlet port.
Optionally, the tenth interface of the first ten-way valve is connected to the third interface of the first ten-way valve through the first quantitative ring; the tenth interface of the twentieth valve is connected to the third interface of the twentieth valve through the first quantitative ring.
Optionally, the first chromatographic column and the fourth chromatographic column are both high molecular polymer chromatographic columns.
Optionally, the second chromatographic column is a glass microsphere chromatographic column.
Optionally, the third chromatographic column and the fifth chromatographic column are both molecular sieve chromatographic columns.
Optionally, the connection mode in the oxygen analysis system for medical and aviation respiration determined by gas chromatography is gas circuit pipeline connection.
Optionally, the system further comprises a chromatographic data analysis module, wherein the chromatographic data analysis module is respectively connected with the first hydrogen flame ionization detector, the second hydrogen flame ionization detector, the thermal conductivity cell detector, the methane conversion device and the dew point transmitter, and the chromatographic data analysis module is used for displaying and storing total hydrocarbons, carbon monoxide, carbon dioxide, oxygen content and water content in the sample.
According to the specific embodiment provided by the utility model, the utility model discloses the following technical effects:
the analysis system for determining oxygen for medical and aviation respiration provided by the utility model can realize analysis and detection of the component contents of total hydrocarbon, carbon monoxide, carbon dioxide, dew point and oxygen in oxygen for medical and aviation respiration by connecting the interface of the automatic switching valve bank with the first quantitative ring, the second quantitative ring, the first chromatographic column, the second chromatographic column, the third chromatographic column, the fourth chromatographic column, the fifth chromatographic column, the first hydrogen flame ionization detector, the second hydrogen flame ionization detector, the thermal conductivity cell detector, the methane conversion device and the dew point transmitter.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic diagram of a gas path flow sampling state of an oxygen analysis system for medical and aviation respiration measured by gas chromatography provided by the present invention;
fig. 2 is a schematic diagram of the gas path flow analysis state of the analysis system for measuring oxygen for medical and aviation breathing by gas chromatography provided by the utility model.
Description of the symbols:
01-a first ten-way valve, 02-a second twenty-way valve, 03-a six-way valve, 04-a first quantitative ring, 05-a second quantitative ring, 06-a sample gas inlet, 07-a first chromatographic column, 08-a second chromatographic column, 09-a third chromatographic column, 11-a fourth chromatographic column, 12-a fifth chromatographic column, 13-a first hydrogen flame ionization detector, 14-a methane conversion device, 15-a second hydrogen flame ionization detector, 16-a thermal conductivity cell detector, 17-a dew point transducer, 18-a first carrier gas, 19-a second carrier gas, 20-a third carrier gas, 21-a fourth carrier gas, 22-a fifth carrier gas, 23-a needle valve gas inlet, 1-a first interface, 2-a second interface, 3-a third interface, 4-a fourth interface, 5-fifth interface, 6-sixth interface, 7-seventh interface, 8-eighth interface, 9-ninth interface, and 10-tenth interface.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The utility model aims to provide an analysis system for measuring oxygen for medical and aviation respiration by using a gas chromatography, so as to realize automatic sampling, analysis and detection of total hydrocarbon, carbon monoxide, carbon dioxide, dew point and oxygen component content in the oxygen for medical and aviation respiration.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-2, the present invention provides an oxygen analysis system for measuring oxygen for medical and aviation respiration by gas chromatography, comprising: the device comprises an automatic switching valve bank, two first quantitative rings 04, a second quantitative ring 05, a first chromatographic column 07, a second chromatographic column 08, a third chromatographic column 09, a fourth chromatographic column 11, a fifth chromatographic column 12, a first hydrogen flame ionization detector 13, a second hydrogen flame ionization detector 15, a thermal conductivity cell detector 16, a methane conversion device 14 and a dew point transmitter 17.
The automatic switching valve group comprises a ten-way valve group and a six-way valve 03; the ten-way valve group comprises a first ten-way valve 01 and a twenty-way valve 02; the interfaces of the automatic switching valve group are named from the beginning according to a clockwise or anticlockwise sequence from any interface. The present invention is named as an example in a clockwise order.
The first port 1 of the first ten-way valve 01 is connected with the sixth port 6 of the six-way valve 03; the second port 2 of the first ten-way valve 01 is connected with the first port 1 of the twenty-way valve 02; the ninth port 9 of the first ten-way valve 01 is connected with the sixth port 6 of the first ten-way valve 01 through the first chromatographic column 07; the eighth interface 8 of the first ten-way valve 01 is connected to the first hydrogen flame ionization detector 13 through the second chromatography column 08.
The second interface 2 of the twentieth valve 02 is connected with the dew point transmitter 17; the ninth port 9 of the twenty-first valve 02 is connected to the sixth port 6 of the twenty-first valve 02 via a third chromatography column 09; the eighth interface 8 of the twentieth valve 02, the fourth chromatographic column 11, the methane conversion device, and the second hydrogen flame ionization detector 15 are connected in sequence.
The fourth interface 4 and the seventh interface 7 of the ten-way valve group are both connected with carrier gas; a fifth interface 5 of the ten-way valve group is connected with the first air inlet; the tenth port 10 of the ten-way valve block is connected with the third port 3 of the ten-way valve block through the first dosing ring 04.
The first port 1 of the six-way valve 03 is connected with the fourth port 4 of the six-way valve 03 through the second dosing ring 05; the second port 2 of the six-way valve 03 is connected with carrier gas; the third interface 3 of the six-way valve 03 is connected with the thermal conductivity cell detector 16 through the fifth chromatographic column 12; the fifth port 5 of the six-way valve 03 is connected to the sample inlet 06.
In practical applications, the first inlet port is a needle valve inlet port 23.
In practical applications, the tenth port 10 of the first ten-way valve 01 is connected to the third port 3 of the first ten-way valve 01 through the first quantitative ring 04; the tenth port 10 of the twenty-first valve 02 is connected to the third port 3 of the twenty-first valve 02 via the first metering ring 04.
In practical applications, the first chromatographic column 07 and the fourth chromatographic column 11 are both polymeric chromatographic columns. The second chromatographic column 08 is a glass microsphere chromatographic column. The third chromatographic column 09 and the fifth chromatographic column 12 are both molecular sieve chromatographic columns.
In practical application, the connection mode of the oxygen analysis system for measuring the medical respiration and the aviation respiration by the gas chromatography is gas circuit pipeline connection, wherein when the gas circuit pipeline is connected with the interface, the gas circuit pipeline is hermetically connected through a clamping sleeve. Specifically, the first ten-way valve 01: the first interface 1 is connected with a sixth interface 6 of the six-way valve 03 through an air path pipeline, the second interface 2 is connected with the first interface 1 of the twentieth-through valve 02 through an air path pipeline, the third interface 3 is connected with the tenth interface 10 through an air path pipeline, the first quantitative ring 04 is arranged on the air path pipeline between the third interface 3 and the tenth interface 10 of the first ten-way valve 01, the fourth interface 4 is connected with the first carrier gas 18 through an air path pipeline, the fifth interface 5 is connected with the needle valve air inlet 23 through an air path pipeline, the sixth interface 6 is connected with the ninth interface 9 through an air path pipeline, the first chromatographic column 07 is arranged on the air path pipeline, the seventh interface is connected with the second carrier gas 19 through a pipeline, the eighth interface 8 is connected with the first air inlet of the second chromatographic column 08 through an air path pipeline, and the air outlet of the second chromatographic column 08 is connected with the first hydrogen flame ionization detector 13 through an air path pipeline. The first carrier gas 18 is used to carry the sample in the first quantitative ring 04 arranged between the third port 3 and the tenth port 10 of the first ten-way valve 01, and after pre-separation by the first chromatographic column 07, oxygen and other components are discharged from the needle valve 23 as shown in the state of fig. 2, and when methane is separated from the chromatographic column 07, the second carrier gas 19 carries the methane and other components in the first chromatographic column 07, and the methane and other components are detected by the first hydrogen flame ionization detector through the second chromatographic column 08 as shown in the state of fig. 1.
The twentieth valve 02 is a ten-way valve, the first interface 1 is connected with the second interface 2 of the first ten-way valve 01 through a gas pipeline, the second interface 2 is connected with a dew point transmitter 17 through a gas pipeline, the third interface 3 is connected with the tenth interface 10 through a gas pipeline, a first quantitative ring 04 on the twentieth valve 02 is arranged on the gas pipeline of the third interface 3 and the tenth interface 10 of the twentieth valve 02, the fourth interface 4 is connected with a fourth carrier gas 21 through a gas pipeline, the fifth interface 5 is connected with a needle valve air inlet 23 through a gas pipeline, the sixth interface 6 is connected with the ninth interface 9 through a gas pipeline, a third chromatographic column 09 is arranged on the section of pipeline, the seventh interface 7 is connected with a fifth carrier gas 22 through a gas pipeline, the eighth interface 8 is connected with a first air inlet of the fourth chromatographic column 11 through a gas pipeline, a gas pipeline of the fourth chromatographic column 11 is connected with a methane conversion device 14 through a gas pipeline, the outlet of the methane reforming device 14 is further connected to a second hydrogen flame ionization detector 15.
The first interface 1 of the six-way valve 03 is connected with the fourth interface 4 through a gas path pipeline, the second quantitative ring 05 is arranged on the gas path pipeline, the second interface 2 is connected with the third carrier gas 20 through a gas path pipeline, the third interface 3 is connected with the first gas inlet of the fifth chromatographic column 12 through a gas path pipeline, the gas outlet of the fifth chromatographic column 12 is connected with the thermal conductivity cell detector 16 through a gas path pipeline, the fifth interface 5 is connected with the sample gas inlet 06 through a gas path pipeline, and the sixth interface 6 is connected with the first interface 1 of the first ten-way valve 01 through a gas path pipeline.
In practical application, the system further comprises a chromatographic data analysis module, wherein the chromatographic data analysis module is respectively connected with the first hydrogen flame ionization detector 13, the second hydrogen flame ionization detector 15, the thermal conductivity cell detector 16, the methane conversion device 14 and the dew point transmitter 17, and the chromatographic data analysis module is used for displaying and storing total hydrocarbons, carbon monoxide, carbon dioxide, oxygen content and water content in a sample.
The working principle of the utility model is as follows:
sampling process
The sample sequentially flows through the fifth interface 5, the fourth interface 4, the second quantitative ring 05 and the first interface 1 of the six-way valve 03 from the sample gas inlet 06, then flows out from the sixth interface 6 to the first interface 1 and the tenth interface 10 of the first ten-way valve 01, the first quantitative ring 04 and the third interface 3 on the first ten-way valve 01, flows out from the second interface 2 to the first interface 1 and the tenth interface 10 of the twenty-way valve 02, flows out from the first quantitative ring 04 and the third interface 3 on the twenty-way valve 02, and finally flows out from the second interface 2 to the dew point transmitter 17.
Determination of dew point
When the measured sample flows to the dew point transducer 17 as shown in the state of fig. 1, the water content in the sample can be displayed in the chromatographic data analysis software in real time and can be read at any time and stored in time.
Determination of oxygen component content
As shown in fig. 2, a third carrier gas 20 carries the sample in the second quantitative ring 05 into the fifth chromatographic column 12, and the oxygen component is detected by the thermal conductivity cell detector 16.
Determination of the Total Hydrocarbon component content
The first carrier gas 18 carries the sample in the first quantitative ring 04 on the first ten-way valve 01 to pass through the first chromatographic column 07, the pre-separated oxygen and other components are discharged from the needle valve gas inlet 23, when the oxygen and other components are completely discharged and the methane is just separated from the first chromatographic column 07, as shown in fig. 2, the first ten-way valve 01 is reset to the state shown in fig. 1, the second carrier gas 19 carries the methane just separated from the first chromatographic column 07 to enter the second chromatographic column 08, and the total hydrocarbon is detected by the first hydrogen flame ionization detector 13.
Determination of content of carbon monoxide and carbon dioxide components
The fourth carrier gas 21 carries the sample in the first quantitative ring 05 to enter the third chromatographic column 09, the pre-separated oxygen and other components are discharged from the needle valve gas inlet 23 as shown in fig. 2, when the oxygen and other components are completely discharged and carbon monoxide is just separated from the third chromatographic column 09, the twentieth valve 02 is reset to the state shown in fig. 1, the fifth carrier gas 22 carries the carbon monoxide and carbon dioxide components just separated from the third chromatographic column 09 to enter the fourth chromatographic column 11, after re-separation, the carbon monoxide and carbon dioxide components are converted by the methane conversion device 14 and then detected by the second hydrogen flame ionization detector 15.
The analysis system for measuring oxygen for medical and aviation respiration by using the gas chromatography provided by the utility model has the advantages of automatic sample introduction, accurate qualitative and quantitative determination, and component separation degree R of more than or equal to 1.5, and overcomes the defects of the analysis mode adopted in the current market. The copper ammonia solution is used for analyzing and detecting the oxygen content, the gas chromatography is used for analyzing and detecting the contents of carbon monoxide, carbon dioxide and total hydrocarbon, a dew point instrument is required to be matched for analyzing and detecting moisture, the operation is inconvenient, and the copper ammonia solution adopts a manual analysis mode and has larger analysis errors.
The first interface, the second interface, … … and the tenth interface in the utility model are only names of interfaces in the first ten-way valve, the twentieth-way valve and the six-way valve, and the first interface is not limited to a corresponding fixed number in the actual automatic switching valve. The first interface may be an interface with any number in an actual automatic switching valve, for example, the first interface may be an interface with the number 1 in the actual automatic switching valve, an interface with the number 2 in the automatic switching valve, or an interface corresponding to another number. The same applies to the second interface to the tenth interface. The first interface, the second interface, … …, the tenth interface is arranged clockwise or counter-clockwise.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the utility model.
Claims (8)
1. An oxygen analysis system for measuring medical and aviation respiration by gas chromatography, which is characterized by comprising: the device comprises an automatic switching valve group, two first quantitative rings, a second quantitative ring, a first chromatographic column, a second chromatographic column, a third chromatographic column, a fourth chromatographic column, a fifth chromatographic column, a first hydrogen flame ionization detector, a second hydrogen flame ionization detector, a thermal conductivity cell detector, a methane conversion device and a dew point transmitter;
the automatic switching valve group comprises a ten-way valve group and a six-way valve; the ten-way valve group comprises a first ten-way valve and a twentieth-way valve; the interfaces of the automatic switching valve group are named from the beginning according to a clockwise or anticlockwise sequence from any interface;
the first port of the first ten-way valve is connected with the sixth port of the six-way valve; the second interface of the first ten-way valve is connected with the first interface of the twentieth-way valve; the ninth interface of the first ten-way valve is connected with the sixth interface of the first ten-way valve through a first chromatographic column; the eighth interface of the first ten-way valve is connected with the first hydrogen flame ionization detector through a second chromatographic column;
a second interface of the twentieth valve is connected with the dew point transmitter; a ninth interface of the twenty-first valve is connected with a sixth interface of the twenty-second valve through a third chromatographic column; the eighth interface of the twenty-first valve, the fourth chromatographic column, the methane conversion device and the second hydrogen flame ionization detector are sequentially connected;
the fourth interface and the seventh interface of the ten-way valve group are both connected with carrier gas; a fifth interface of the ten-way valve group is connected with the first air inlet; a tenth port of the ten-way valve block is connected with a third port of the ten-way valve block through the first quantitative ring;
the first interface of the six-way valve is connected with the fourth interface of the six-way valve through the second quantitative ring; the second interface of the six-way valve is connected with carrier gas; the third interface of the six-way valve is connected with the thermal conductivity cell detector through the fifth chromatographic column; and a fifth interface of the six-way valve is connected with the sample gas inlet.
2. The system of claim 1, wherein the first inlet port is a needle valve inlet port.
3. The gas chromatography based medical and aviation breath oxygen analysis system of claim 1, wherein the tenth port of said first ten-way valve is connected to the third port of said first ten-way valve through said first quantitative ring; the tenth interface of the twentieth valve is connected to the third interface of the twentieth valve through the first quantitative ring.
4. The system of claim 1, wherein the first chromatographic column and the fourth chromatographic column are both polymeric chromatographic columns.
5. The system of claim 1, wherein the second chromatographic column is a glass microsphere chromatographic column.
6. The gas chromatography breath oxygen analysis system of claim 1, wherein said third chromatographic column and said fifth chromatographic column are molecular sieve chromatographic columns.
7. The system for analyzing oxygen for measuring medical and aviation respiration by gas chromatography according to claim 1, wherein the system for analyzing oxygen for measuring medical and aviation respiration by gas chromatography is connected by a gas pipeline.
8. The system for analyzing oxygen for measuring medical and aviation breathing through gas chromatography according to claim 1, further comprising a chromatographic data analysis module, wherein the chromatographic data analysis module is respectively connected with the first hydrogen flame ionization detector, the second hydrogen flame ionization detector, the thermal conductivity cell detector, the methane conversion device and the dew point transmitter, and the chromatographic data analysis module is used for displaying and storing total hydrocarbons, carbon monoxide, carbon dioxide, oxygen content and water content in a sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121984777.8U CN215727945U (en) | 2021-08-23 | 2021-08-23 | Oxygen analysis system for measuring medical and aviation respiration by gas chromatography |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121984777.8U CN215727945U (en) | 2021-08-23 | 2021-08-23 | Oxygen analysis system for measuring medical and aviation respiration by gas chromatography |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215727945U true CN215727945U (en) | 2022-02-01 |
Family
ID=79999871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121984777.8U Active CN215727945U (en) | 2021-08-23 | 2021-08-23 | Oxygen analysis system for measuring medical and aviation respiration by gas chromatography |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215727945U (en) |
-
2021
- 2021-08-23 CN CN202121984777.8U patent/CN215727945U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111380988B (en) | Gas chromatograph for measuring impurity content in hydrogen and detection method | |
| CN202153220U (en) | NMHC (nonmethane hydrocarbons) measurement gas chromatograph | |
| CN113567609A (en) | Oxygen analysis system for measuring medical and aviation respiration by gas chromatography | |
| CN201319028Y (en) | Portable sulphur hexafluoride gas chromatograph | |
| CN101923098A (en) | Continuous on-line analysis device of benzene, total hydrocarbons, methane and CO in carbon dioxide | |
| CN113960217A (en) | Method and system for measuring content of gas components in fuel hydrogen | |
| CN1979172B (en) | Gas analyzing method | |
| CN104678034A (en) | Analysis system for determining impurity components in highly pure gases, and determination method thereof | |
| CN201765237U (en) | Continuous online analysis device for analyzing benzene, total hydrocarbons, methane and carbon monoxide in carbon dioxide | |
| CN102445508A (en) | Helium ion gas chromatograph and use method thereof | |
| CN111257473A (en) | Non-methane total hydrocarbon on-line detection device | |
| CN106153431B (en) | A kind of detection method and its device of quick measurement raw gas ingredient | |
| CN215727945U (en) | Oxygen analysis system for measuring medical and aviation respiration by gas chromatography | |
| CN213903428U (en) | Non-methane total hydrocarbon analysis device | |
| CN202770815U (en) | Special gas chromatograph for analysis of high-purity carbon dioxide | |
| CN202305489U (en) | Chromatographic instrument for detecting failure of SF6 electric equipment | |
| CN112798714A (en) | Detection system and method for non-methane total hydrocarbons | |
| CN202814939U (en) | Analysis device with serial double columns and back flushing | |
| CN201177622Y (en) | Gas-chromatography analyzer | |
| CN110376324A (en) | Utilize the method and gas chromatograph of flame ionization ditector measurement oxygen concentration | |
| CN203422358U (en) | Analysis device for gases in 5N high-purity carbon dioxide | |
| CN103472162B (en) | The method that methane in sewage gas and hydrogen detect simultaneously | |
| CN202256274U (en) | Helium ion gas chromatograph | |
| CN212568651U (en) | Non-methane total hydrocarbon detection device | |
| CN215727925U (en) | Analysis system for components of perfluoroisobutyronitrile carbon dioxide mixed gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |