CN113156008A - Analysis device for dissolved gas in insulating oil - Google Patents
Analysis device for dissolved gas in insulating oil Download PDFInfo
- Publication number
- CN113156008A CN113156008A CN202110418710.6A CN202110418710A CN113156008A CN 113156008 A CN113156008 A CN 113156008A CN 202110418710 A CN202110418710 A CN 202110418710A CN 113156008 A CN113156008 A CN 113156008A
- Authority
- CN
- China
- Prior art keywords
- gas
- detector
- sample
- epd
- insulating oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
-
- 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
- G01N30/60—Construction of the column
-
- 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
- G01N30/62—Detectors specially adapted therefor
- G01N30/64—Electrical detectors
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses an analysis device for dissolved gas in insulating oil, which comprises a quantitative ring, a sample injection valve, a chromatographic column, an EPD (electrophoretic display) detector and a data processor, wherein carrier gas and sample gas to be detected sequentially enter the chromatographic column through the sample injection valve and the quantitative ring, are separated by the chromatographic column and then are sent to the EPD detector; the carrier gas is ionized into plasma, when the sample gas enters the EPD detector, the plasma is ionized to generate optical signals with different wavelengths, and the EPD detector converts the optical signals with different wavelengths into different electric signals; the data processor collects all the electric signals and calculates the content of each component in the sample gas according to the numerical value of the electric signals. The invention adopts a single chromatographic column and a single detector to analyze dissolved gas in nine kinds of insulating oil, and solves the problem that the existing complex switching multi-column multi-detector cannot be simplified and portable.
Description
Technical Field
The invention relates to the technical field of detection and maintenance of electrical equipment, in particular to an analysis device for dissolved gas in insulating oil.
Background
The insulating oil is mineral insulating oil used for power transmission and transformation equipment such as transformers, reactors, transformers, sleeves or oil circuit breakers and the like. The analysis of the gas dissolved in the insulating oil is to analyze the components and the content of the gas dissolved in the insulating oil of the oil-filled electrical equipment and diagnose whether the equipment is abnormal or not according to the components, the content and the change condition of the gas. When abnormal phenomena such as local overheating and local discharge occur in oil-filled electrical equipment, the insulating oil and solid insulation (pressboard, insulating paper, etc.) near the heating source can generate overheating decomposition reaction to generate CO2、CO、H2And CH4、C2H4、C2H2And the like. Since most of these gases are dissolved in the insulating oil, the operation of the electrical equipment can be determined by extracting the gases from the insulating oil sampled by the oil-filled equipment and analyzing the extracted gases. Gas chromatography is an effective means for analyzing the components and contents of gases at present.
For gas chromatography, an oil sample is first extracted from an oil-filled electrical device in an operating state. The correctness of the sampling method and the sampling process seriously affect the reliability of the analysis result. If the oil sample comes into contact with air, the test results will be more than doubled. Therefore, in both IEC and domestic regulations, it is required that the oil sample be kept from contact with air during sampling and transportation. Secondly, inevitable shake, temperature variation all exert an influence to the sample in the transportation, and through sample, transportation, detect whole detection cycle that adds together, can not discover latent trouble in time and effectual track development trend moreover. Because of the limitation of the equipment cost and the technical strength, each power station cannot be equipped with an oil chromatographic analyzer, and operators cannot master and monitor the operation condition of the transformer of the power station at any time.
The current standard and test method uses two chromatography columns, two TCD detectors (thermal conductivity detectors), one FID detector (hydrogen flame detector), and one nickel reformer, and the complete analysis results are obtained by switching the sample gas between the chromatography columns and the detector. The method is complex in design and high in maintenance difficulty, the scheme is suitable for working environments in which online laboratories have no requirements on the weight, the volume and the use power of experimental instruments, the conversion portable field detection difficulty is high, and the volume and the weight of the instruments cannot achieve ideal effects.
Disclosure of Invention
The invention aims to provide an analysis device for dissolved gas in insulating oil, which is used for solving the problems that the conventional single chromatographic column and single detector can only analyze a plurality of gas components in the dissolved gas in the insulating oil and can not realize comprehensive detection of the dissolved gas and the conventional complex switching multi-column multi-detector can not be simplified and portable.
The purpose of the invention is realized by the following technical scheme:
an analysis device for dissolved gas in insulating oil comprises a quantitative ring, a sample injection valve, a chromatographic column, an EPD detector and a data processor, wherein carrier gas and sample gas to be detected sequentially enter the chromatographic column through the sample injection valve and the quantitative ring, are separated by the chromatographic column and then are sent to the EPD detector; the carrier gas is ionized into plasma, when the sample gas enters the EPD detector, the plasma is ionized to generate optical signals with different wavelengths, and the EPD detector converts the optical signals with different wavelengths into different electric signals; the data processor collects all the electric signals and calculates the content of each component in the sample gas according to the numerical value of the electric signals.
Further, a capillary column is arranged between the sample injection valve and the chromatographic column, and the capillary column is used for carrying out isolation purging and shunting on the sample gas.
Furthermore, the EPD detector is provided with four single-wavelength optical filters and a photoelectric sensor, when the gas to be detected enters the EPD detector, the gas is ionized by the plasma and generates optical signals with different wavelengths, and the optical signals with different wavelengths are converted into different electric signals through the photodiode after being filtered by the single-wavelength optical filters.
Furthermore, the sample injection valve is a six-way valve or a ten-way valve.
Furthermore, a high-frequency and high-intensity electromagnetic field is applied around the cell body of the EPD detector, and the carrier gas is ionized into plasma under the action of the high-frequency and high-intensity electromagnetic field.
Further, the sampling amount of the quantitative ring is 1 mL.
Further, a gas purifier is added before the carrier gas inlet of the sample injection valve.
Further, the carrier gas is helium.
Further, the value of the electrical signal is proportional to the amount of the component.
Further, the stainless steel tube of the chromatography column has a specification of 1/16 inches or 1/8 inches.
Compared with the prior art, the analysis device for the dissolved gas in the insulating oil has the following beneficial effects:
(1) the sample is guaranteed not to be interfered by the permeation of ambient air, the pipeline does not adsorb the sample, and the dead volume is reduced to the maximum extent.
(2) The carbon molecular sieve Carboxen series chromatographic column can ensure the separation degree, the peak time and no absorption loss to the sample. For gas component H dissolved in insulating oil2、O2、N2、CH4、CO、CO2、C2H4、C2H6、C2H2The method has the highest response, reaches ppb level and percent concentration level, and has the lowest detection limit effect.
(3) Optimally adjusting an EPD enhanced plasma discharge detector to the gas component H dissolved in the insulating oil2、O2、N2、CH4、CO、CO2、C2H4、C2H6、C2H2The detection method has the highest correspondence, reaches ppb level and percent concentration level, and has the lowest detection limit effect.
Drawings
FIG. 1 is a gas circuit principle of a sampling state of a six-way valve sample injection mode;
FIG. 2 is a gas circuit principle of a sample injection state in a six-way valve sample injection manner;
fig. 3 is a schematic diagram of the capillary column completely separating nine gases in the insulating oil;
FIG. 4 is a schematic diagram of a sampling state of the six-way valve;
fig. 5 is a schematic diagram of the sampling state of the six-way valve.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The invention relates to an analysis device for dissolved gas in insulating oil, which is shown in figures 1 and 2 and comprises a quantitative ring 10, a sample injection valve 11, a chromatographic column 13, an EPD detector 14 and a data processor 15, wherein carrier gas and sample gas to be detected enter the chromatographic column 13 through the sample injection valve 11 and the quantitative ring 10, are separated by the chromatographic column 13 and then are sent to the EPD detector 14, the carrier gas is ionized into plasma, and when the sample gas to be detected enters the EPD detector 14, the plasma is ionized and emits light with different wavelengths, and the light is filtered by a single-wavelength optical filter, so that different optical signals are converted into different electric signals through a photodiode. The data processor 15 collects all the electric signals and calculates the content of each component in the gas of the sample to be measured according to the magnitude of the electric signals.
The sample gas to be measured contains hydrogen (H)2) Oxygen (O)2) Nitrogen (N)2) Carbon monoxide (CO), methane (CH)4) Two, twoCarbon Oxide (CO)2) Acetylene (C)2H2) Ethylene (C)2H4) Ethane (C)2H6)。
Preferably, a capillary column 12 is further included between the sample injection valve 11 and the chromatographic column 13, the capillary column 12 performs isolated purging and split flow on the sample gas, and the split flow is to discharge the gasified sample gas in a certain proportion for sample injection. The isolation purging has the main function of eliminating impurities possibly brought in during sample injection and impurities released by a sample injection port sealing gasket under a high-temperature condition; prevent air infiltration and reduce sample component interference.
Furthermore, the EPD detector 14 has four single-wavelength filters and four photosensors with different wavelengths, and after the sample gas to be detected enters the EPD detector 14, the sample gas is ionized by the plasma and generates optical signals with different wavelengths, and the optical signals are filtered by the single-wavelength filters, so that the different optical signals are converted into different electrical signals by the photodiodes. The EPD detector 14 is connected with a path of helium gas of 0-5mL/min as doping gas to improve the sensitivity and keep the ionization effect.
Further, the sample injection valve 11 is a six-way valve or a ten-way valve, which is illustrated by taking a six-way valve as an example, and includes 6 holes, as shown in fig. 1 or fig. 2. A dosing ring 10 is connected between the hole 5 and the hole 2. Hole 4 acts as a carrier gas inlet and hole 3 acts as a carrier gas outlet. The hole 6 is used as a sample gas inlet, and the hole 1 is used as a sample gas outlet.
The quantitative ring 10 is used in cooperation with the six-way valve to accurately quantify the sample gas to 1 ml.
The six-way valve has the function of seamlessly switching among different pipelines, and when the valve is connected into a carrier gas flow path and is in an off state, a gas injector, a gas sampling bag or a sample steel cylinder and the like can be used for injecting sample gas into the quantitative ring. When the dosing ring 10 is filled and allowed to equilibrate for a period of time, the valve is switched to the on state and the carrier gas will carry the sample gas into the column 13. As shown in FIG. 4, for sampling, hole 4 communicates with hole 3, hole 6 is the same as hole 5, hole 1 communicates with hole 2, carrier gas enters from hole 4 and exits from hole 3, and hole 3 is connected to a gas chromatography system. The quantitative ring is connected with the hole 5 and the hole 2, and the sample gas enters from the hole 6, enters the quantitative ring 10 through the hole 5 and then exits from the hole 1 through the hole 2. When the whole quantitative ring is filled with the sample gas, the six-way valve is switched to the sample injection state, as shown in fig. 5, the hole 4 is communicated with the hole 5, the hole 6 is communicated with the hole 1, and the hole 2 is communicated with the hole 3. The driving mode can be manual, pneumatic and electric, a ten-way valve can also be used for installing a back-flushing gas circuit, the sample injection valve has an isolation purging function, the capillary column sample injection port also has the functions of isolation purging and shunt, and the shunt is used for discharging gasified sample gas in a certain proportion for sample injection. When sample introduction is carried out, firstly, carrier gas is used for bringing sample gas into a chromatographic column at a certain flow rate for separation; the isolation purging has the main function of eliminating impurities possibly brought in during sample injection and impurities released by a sample injection port sealing gasket under a high-temperature condition; prevent air infiltration and reduce sample component interference.
The invention adopts a single chromatographic column and a single detector to analyze dissolved gas in nine kinds of insulating oil, and solves the problem that the existing complex switching multi-column multi-detector cannot be simplified and portable.
Further, the capillary column 12 is a Carboxen series PLOT column, chemically treated and particle suspension deposited to bond the adsorbent to the capillary wall to produce a porous open tubular column.
Furthermore, the chromatographic column can be prepared into a packed capillary column by adopting a physical packing method, the common specification of a stainless steel tube of the chromatographic column is 1/16 inches or 1/8 inches, the capillary column is prepared by adopting a porous layer open tubular column technology, the chromatographic column can be prepared by coating polyimide outside quartz, and can also be prepared into a 30-meter capillary column by coating the polyimide inside 1/16 stainless steel tube.
Further, the EPD detector 14 is an enhanced plasma detector. The detection principle is as follows: the high-frequency and high-intensity electromagnetic field is applied around the cell body of the detector, the carrier gas is ionized into plasma under the action of the high-frequency and high-intensity electromagnetic field, after the sample enters the cell body of the detector, the plasma is ionized and emits light with different wavelengths, the light is filtered by the single-wavelength optical filter, the optical signal is converted into an electrical signal by the photodiode, the intensity of the electrical signal is in direct proportion to the content of the components in the sample gas, and the electrical signal is collected.
The sample injection valve 11 can be directly connected with the chromatographic column 13, or can be connected with a set of capillary columns 12 and then connected with the chromatographic column 13. The capillary column has a flow dividing function and is combined with an electronic flow control system to accurately reduce a sample inlet, gas sampled by a vibration standard method enters a chromatographic column 13 through a sample inlet system for separation, the chromatographic column is arranged in a temperature programmed column incubator, the temperature programmed column is started during sample introduction, nine target substances enter an EPD detector 14, and the nine target substances are dissolved gases in insulating oil required to be detected in GB/T7252 transformer oil dissolved gas analysis and judgment guide rules and DLT722 transformer oil dissolved gas analysis and judgment guide rules according to the national standard. And analyzing under the condition of the optimal effect of the detector, wherein the optimal effect of the detector is the requirement of the lowest detection limit and the separation degree specified in the two standards, acquiring and calculating a corresponding calculation result through the data processor 15, calculating the intensity of an electric signal according to the proportional relation between the concentration of the detection substance and the signal to obtain the concentration when receiving the numerical value of the electric signal of the detector 14, detecting the content of nine dissolved gases in the insulating oil according to the principle, and calculating and analyzing data to obtain an experimental result.
The temperature programming of the column oven is designed to be 35 ℃ of initial temperature, the temperature rising rate is 10 ℃/min, and the temperature rises to 250 ℃.
Furthermore, the carrier gas is helium, and the carrier gas flow is 3-30 mL/min.
Further, the carrier gas passes through the gas purifier and then is input into the carrier gas inlet. Because the concentration of the high-purity helium sold on the market can not reach 99.9999999 percent required by a detector, a purifier is required to be added for purification, the gas purifier can remove impurities in the gas from a molecular level, and the purity of the purified gas is more than or equal to 99.999999 percent.
The carrier gas sample amount and the sample gas sample amount of the quantitative ring were both 1 mL.
The capillary column 12 split ratio was 10: 1.
As shown in fig. 3, the Carboxen series PLOT capillary column can completely separate nine gases in the insulating oil, and the specific peak sequences are 1 hydrogen, 2 oxygen, 3 nitrogen, 4 carbon monoxide, 5 methane, 6 carbon dioxide, 7 acetylene, 8 ethylene and 9 ethane.
In conclusion, the analysis device for the dissolved gas in the insulating oil uses the sample injection valve to inject the sample, the sample enters the EPD detection after being separated by the single-color Carboxen series PLOT capillary column, the chromatographic column can accurately separate the dissolved gas in nine insulating oils, including hydrogen, oxygen, nitrogen, carbon monoxide, methane, carbon dioxide, acetylene, ethylene and ethane, has a short analysis period, can completely separate nine components by only using one chromatographic column and one detector, is suitable for the application scenes of online monitoring, laboratory analysis and portable field analysis, replaces the chromatographic analysis method of the gas chromatography determination method for the content of the dissolved gas components in the insulating oil of GB/T17623 in the prior standard, judges the type of electrical internal fault according to the analysis and judgment guide rule of the dissolved gas in the transformer oil of DL/T722, and is a special guarantee for timely and accurate guarantee of the operation of electrical equipment.
The above description is for the purpose of illustrating embodiments of the invention and is not intended to limit the invention, and it will be apparent to those skilled in the art that any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the invention shall fall within the protection scope of the invention.
Claims (10)
1. An analysis device for dissolved gas in insulating oil is characterized by comprising a quantitative ring, a sample injection valve, a chromatographic column, an EPD detector and a data processor, wherein carrier gas and sample gas to be detected sequentially enter the chromatographic column through the sample injection valve and the quantitative ring, are separated by the chromatographic column and then are sent to the EPD detector; the carrier gas is ionized into plasma, when the sample gas enters the EPD detector, the plasma is ionized to generate optical signals with different wavelengths, and the EPD detector converts the optical signals with different wavelengths into different electric signals; the data processor collects all the electric signals and calculates the content of each component in the sample gas according to the numerical value of the electric signals.
2. The apparatus according to claim 1, further comprising a capillary column between the sample injection valve and the chromatographic column, wherein the capillary column is used for separately purging and shunting the sample gas.
3. The apparatus as claimed in claim 1 or 2, wherein the EPD detector has four single wavelength filters and a photo sensor, and after the sample gas enters the EPD detector, the sample gas is ionized by the plasma and generates optical signals with different wavelengths, and the optical signals with different wavelengths are filtered by the single wavelength filters and converted into different electrical signals by the photo diode.
4. The apparatus as claimed in claim 1 or 2, wherein the sample injection valve is a six-way valve or a ten-way valve.
5. The apparatus for analyzing a gas dissolved in insulating oil according to claim 1 or 2, wherein a high-frequency, high-intensity electromagnetic field is applied around the body of the EPD detector, and the carrier gas is ionized into plasma by the high-frequency, high-intensity electromagnetic field.
6. The apparatus for analyzing a gas dissolved in insulating oil according to claim 1 or 2, wherein the quantitative ring is inserted in an amount of 1 mL.
7. The apparatus for analyzing a gas dissolved in insulating oil according to claim 1 or 2, wherein a gas purifier is added before the carrier gas inlet of the injection valve.
8. The apparatus for analyzing a gas dissolved in insulating oil according to claim 1 or 2, wherein the carrier gas is helium.
9. The apparatus for analyzing a gas dissolved in insulating oil according to claim 3, wherein the value of the electric signal is proportional to the content of the component.
10. The apparatus for analyzing a dissolved gas in insulating oil according to claim 1 or 2, wherein the stainless steel tube of the chromatography column has a size of 1/16 inches or 1/8 inches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110418710.6A CN113156008A (en) | 2021-04-19 | 2021-04-19 | Analysis device for dissolved gas in insulating oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110418710.6A CN113156008A (en) | 2021-04-19 | 2021-04-19 | Analysis device for dissolved gas in insulating oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113156008A true CN113156008A (en) | 2021-07-23 |
Family
ID=76868821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110418710.6A Pending CN113156008A (en) | 2021-04-19 | 2021-04-19 | Analysis device for dissolved gas in insulating oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113156008A (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1238285A (en) * | 1967-11-02 | 1971-07-07 | ||
| US4851683A (en) * | 1987-03-09 | 1989-07-25 | Brigham Young University | Element specific radio frequency discharge helium plasma detector for chromatography |
| CN1890546A (en) * | 2003-12-12 | 2007-01-03 | 克里奥瓦克公司 | Method for detecting leakage of sealed package |
| CN201974415U (en) * | 2010-11-30 | 2011-09-14 | 常州豪邦纳米科技涂料有限公司 | Gas chromatograph with microsyringe |
| CN103424490A (en) * | 2013-08-23 | 2013-12-04 | 上海华爱色谱分析技术有限公司 | Gas chromatograph with plasma emission detector |
| CN104076102A (en) * | 2014-07-01 | 2014-10-01 | 长沙业嘉电子科技有限公司 | Analyzer for gas dissolved in mobile type insulating oil and detection method of gas dissolved in mobile type insulating oil |
| CN105353057A (en) * | 2015-12-17 | 2016-02-24 | 中国原子能科学研究院 | Gas chromatography detection system and method for online analysis of trace He, H2 and impurity components in Ne |
| WO2016051357A1 (en) * | 2014-10-01 | 2016-04-07 | Ldetek Inc. | Detection of gas impurities with a gas chromatograph |
| CN106290590A (en) * | 2015-05-13 | 2017-01-04 | 湖南大学 | Minimum gas optoacoustic spectroscopy and chromatograph joint used instrument and the method for analysis in insulating oil |
| WO2017092368A1 (en) * | 2015-12-03 | 2017-06-08 | 朱伯秦 | Gas-phase chromatographic analyzer and gas sampling apparatus |
| CN106841485A (en) * | 2017-02-16 | 2017-06-13 | 成都凯圣捷科技有限公司 | PED plasma detectors |
| CN208283342U (en) * | 2018-06-12 | 2018-12-25 | 沈阳汉威科技有限公司 | A kind of gas-phase chromatography vaporizer |
| CN111006926A (en) * | 2019-12-23 | 2020-04-14 | 广东省计量科学研究院（华南国家计量测试中心） | Nitrogen dioxide gas standard substance in carbon dioxide and preparation method and application thereof |
| CN211235687U (en) * | 2019-10-23 | 2020-08-11 | 朗析仪器（上海）有限公司 | Chromatographic analysis system for separating methanol, acetaldehyde, ethylene oxide and chloroethylene |
-
2021
- 2021-04-19 CN CN202110418710.6A patent/CN113156008A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1238285A (en) * | 1967-11-02 | 1971-07-07 | ||
| US4851683A (en) * | 1987-03-09 | 1989-07-25 | Brigham Young University | Element specific radio frequency discharge helium plasma detector for chromatography |
| CN1890546A (en) * | 2003-12-12 | 2007-01-03 | 克里奥瓦克公司 | Method for detecting leakage of sealed package |
| CN201974415U (en) * | 2010-11-30 | 2011-09-14 | 常州豪邦纳米科技涂料有限公司 | Gas chromatograph with microsyringe |
| CN103424490A (en) * | 2013-08-23 | 2013-12-04 | 上海华爱色谱分析技术有限公司 | Gas chromatograph with plasma emission detector |
| CN104076102A (en) * | 2014-07-01 | 2014-10-01 | 长沙业嘉电子科技有限公司 | Analyzer for gas dissolved in mobile type insulating oil and detection method of gas dissolved in mobile type insulating oil |
| WO2016051357A1 (en) * | 2014-10-01 | 2016-04-07 | Ldetek Inc. | Detection of gas impurities with a gas chromatograph |
| CN106290590A (en) * | 2015-05-13 | 2017-01-04 | 湖南大学 | Minimum gas optoacoustic spectroscopy and chromatograph joint used instrument and the method for analysis in insulating oil |
| WO2017092368A1 (en) * | 2015-12-03 | 2017-06-08 | 朱伯秦 | Gas-phase chromatographic analyzer and gas sampling apparatus |
| CN105353057A (en) * | 2015-12-17 | 2016-02-24 | 中国原子能科学研究院 | Gas chromatography detection system and method for online analysis of trace He, H2 and impurity components in Ne |
| CN106841485A (en) * | 2017-02-16 | 2017-06-13 | 成都凯圣捷科技有限公司 | PED plasma detectors |
| CN208283342U (en) * | 2018-06-12 | 2018-12-25 | 沈阳汉威科技有限公司 | A kind of gas-phase chromatography vaporizer |
| CN211235687U (en) * | 2019-10-23 | 2020-08-11 | 朗析仪器（上海）有限公司 | Chromatographic analysis system for separating methanol, acetaldehyde, ethylene oxide and chloroethylene |
| CN111006926A (en) * | 2019-12-23 | 2020-04-14 | 广东省计量科学研究院（华南国家计量测试中心） | Nitrogen dioxide gas standard substance in carbon dioxide and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
|---|
| YVES GAMASHE 等: "增强型等离子体放电检测器(EPD)的特点和应用", 《中国化学会第22届全国色谱学术报告会及仪器展览会论文集（第一卷）》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6042965B2 (en) | Sample introduction device | |
| EP2008076B1 (en) | Apparatus for performing dissolved gas analysis | |
| CN104076102B (en) | Mobile insulation dissolved gas analysis instrument and detection method thereof | |
| CN103336070B (en) | The pick-up unit of sulfur-bearing failure gas component and method in a kind of quantitative detection sulfur hexafluoride electrical equipment | |
| CA2235021C (en) | A method and apparatus for monitoring gas(es) in a dielectric fluid | |
| CN102928499B (en) | Rapid analysis device and method for ambient air volatile organic compounds | |
| CN102353737A (en) | Detection device for detecting sulfur hexafluoride electrical equipment fault gas | |
| CN104280492A (en) | Elemental analyzer for testing organic carbon and nitrogen in soil and plants | |
| CN105353056A (en) | Volatile organic compound online monitoring system | |
| EP0214237B1 (en) | Method and apparatus for analyzing gases dissolved in a liquid sample | |
| CN101995532A (en) | Internal discharge detection method of sulfur hexafluoride gas insulation equipment | |
| CN104280489A (en) | Chromatographic analyzer | |
| CN102590419B (en) | Device used for analyzing mixed gas in expansion tank of power transformer and based on gas chromatographic technology | |
| CN205080119U (en) | Volatility organic gas on -line monitoring system | |
| CN107045033A (en) | A kind of benzene in air system thing on-line monitoring gas chromatograph | |
| CN203490201U (en) | Gas chromatograph with plasma emission detector | |
| CN106525998A (en) | Method of measuring content of benzene series ingredients in stationary pollution source waste gas | |
| CN114019040A (en) | System for detecting gas impurities in sulfur hexafluoride | |
| CN113156008A (en) | Analysis device for dissolved gas in insulating oil | |
| CN103837629A (en) | Device and detection method for chromatography of CO, CH4 and CO2 ingredients in gas | |
| CN209894763U (en) | Detection apparatus for non-methane total hydrocarbon | |
| CN203405450U (en) | Detection device for quantitatively detecting sulfur-containing fault gas components in sulphur hexafluoride electrical equipment | |
| CN103424490A (en) | Gas chromatograph with plasma emission detector | |
| CN211453104U (en) | Integrated universal device for dewatering and sampling preconcentration | |
| CN208888198U (en) | A kind of system of quantitative detection sulfur hexafluoride gas ingredient |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210723 |
|
| RJ01 | Rejection of invention patent application after publication |