CN113964015A - Device for external standard quantification of time-of-flight mass spectrum - Google Patents
Device for external standard quantification of time-of-flight mass spectrum Download PDFInfo
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- CN113964015A CN113964015A CN202111252934.0A CN202111252934A CN113964015A CN 113964015 A CN113964015 A CN 113964015A CN 202111252934 A CN202111252934 A CN 202111252934A CN 113964015 A CN113964015 A CN 113964015A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/26—Mass spectrometers or separator tubes
- H01J49/34—Dynamic spectrometers
- H01J49/40—Time-of-flight spectrometers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/04—Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components
- H01J49/0422—Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components for gaseous samples
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/04—Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components
- H01J49/0468—Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components with means for heating or cooling the sample
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/04—Arrangements for introducing or extracting samples to be analysed, e.g. vacuum locks; Arrangements for external adjustment of electron- or ion-optical components
- H01J49/0495—Vacuum locks; Valves
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Abstract
The application discloses a device for external standard quantification of a flight time mass spectrum, which relates to the technical field of external standard quantification of mass spectra and comprises an air pump, wherein an air outlet of the air pump is connected with an air inlet of a flowmeter through a pipeline; the air outlet of the flowmeter is connected with the air inlet of the thermos bottle through a pipeline; the air outlet of the vacuum flask is connected with the air inlet of the calibration switch valve; the gas outlet of the calibration switch valve is connected with a first sample inlet of the time-of-flight mass spectrometer; a permeation tube is arranged in the vacuum flask. Start the air pump with the gas pump in the thermos, during gas gets into the time of flight mass spectrometer through the thermos and takes the material of release in the infiltration pipe, can realize the settlement of maring the appearance gas through observing the flowmeter and setting for the temperature in the thermos, accomplish the back of maring, through maring the ooff valve locking, then open other introduction channel of time of flight mass spectrometer and detect can. The mode does not need to disassemble and assemble the pipeline for many times, and the problem of pollution caused by sharing one sample inlet is avoided.
Description
Technical Field
The application relates to the technical field of external standard quantification of mass spectra, in particular to a device for external standard quantification of a time-of-flight mass spectrum.
Background
Time-of-Flight Mass Spectrometer Time of Flight Mass Spectrometer (TOF) is a very common Mass Spectrometer. The mass analyser of such a mass spectrometer is an ion drift tube. Ions generated by the ion source are accelerated into the field-free drift tube and fly at a constant velocity towards the ion receiver. According to the principle that ions with different masses can be separated according to the m/z value, the larger the mass of the ions, the longer the time taken for the ions to reach the receiver, and the smaller the mass of the ions, the shorter the time taken for the ions to reach the receiver. The flight time mass spectrometer has the advantages of large detectable molecular weight range, high scanning speed and simple instrument structure. The main disadvantage of such time-of-flight mass spectrometers is their low resolution, since the ions differ in their initial energy as they leave the ion source, so that ions with the same mass-to-charge ratio have a distribution of times of arrival at the detector, resulting in a reduced resolving power. One of the improved methods is to add a group of electrostatic field reflectors in front of the linear detector to reversely push back the ions in free flight, and the ions with large initial energy have long distance to enter the electrostatic field reflectors due to high initial speed, the distance of the ions with small initial energy is long, the distance of the ions with small initial energy is short, and the ions with small initial energy are focused at a certain position of the return path, so that the resolution capability of the instrument is improved. Such a time-of-flight mass spectrometer with an electrostatic field mirror is called a reflection time-of-flight mass spectrometer (reflection time-of-flight mass spectrometer).
Sulfur hexafluoride (SF)6) The gas has excellent physical and chemical properties and insulating and arc extinguishing performance, and is widely applied to electrical equipment such as a totally-enclosed combined electrical apparatus (GIS), a Gas Insulated Transformer (GIT) and the like. After more than 30 years of development and development, the GIS technology is rapidly and rapidly applied to power systems all over the world and becomes the mainstream of the development of high-voltage electrical appliances in this century.
SF6The safe operation of the electrical equipment is crucial to the stability of the whole power system, once a fault occurs, the power failure of the local area or even all areas is caused, and therefore, the power failure of the SF is avoided6Regular detection of electrical devices is of vital importance. For SF6The detection of the electrical equipment mainly comprises the analysis of the components in the electrical equipment, sulfur dioxide, sulfuryl fluoride and fluorocarbon can be generated when the equipment breaks down, the operation condition inside the equipment can be judged through the detection of the decomposition products, and the fault early warning effect can be realized by timely finding the problems.
In sulfur hexafluoride (SF)6) During detection, a time-of-flight mass spectrometer is frequently needed, the time-of-flight mass spectrometer generally needs to be calibrated before detection, the existing calibration method is carried out from one pipeline of the time-of-flight mass spectrometer, namely a calibration port and a detection port share one pipeline, so that cross contamination is easily caused, and in addition, a gas circuit needs to be frequently disassembled and assembled, and the operation is very inconvenient.
Disclosure of Invention
In order to solve the above problems, the present application is implemented by the following technical solutions:
a device for external calibration of time-of-flight mass spectrometry comprises an air pump, a flowmeter, a vacuum flask and a calibration switch valve;
the air outlet of the air pump is connected with the air inlet of the flowmeter through a pipeline;
the air outlet of the flowmeter is connected with the air inlet of the thermos bottle through a pipeline;
the air outlet of the vacuum flask is connected with the air inlet of the calibration switch valve;
the gas outlet of the calibration switch valve is connected with a first sample inlet of the time-of-flight mass spectrometer;
a permeation tube is arranged in the vacuum flask. The permeate tube is a small inert vessel containing two balanced pure chemicals. It may be in a gas/liquid phase or a gas/solid phase. At a constant temperature, the contents of the permeate tube permeate outwardly through the permeate site at a rate. The permeate tube was inserted into a carrier gas stream to produce the concentration required for the test. For calibrating gas analyzer systems, hazardous gas alarm testing, long term research of materials and biological systems, and any application where stable trace concentrations are required. The tubular permeate tube seals the desired permeate gas within the permeate tube. Are widely used in various osmotic devices. The end is impervious to the outside penetration through all the tube wall length of the penetration tube. The permeability can vary widely depending on the length and wall thickness of the permeate channel, and is typically between 5 ng/min and 50000 ng/min. The effective permeate length (the section where the permeate occurs) of the permeate channel is between 0.5cm and 20 cm. The long permeate tube is made up of a standard permeate tube and an impermeable stainless steel container. Such permeate tubes can provide the desired permeability, but have a greatly improved life. The service life of the permeation tube can be improved by 3 times for the effective permeation length of 5cm, and can be improved by 12 times for the effective permeation length of 1 cm. Need carry out the calibration to time of flight mass spectrometer, at first close other introduction passageway of time of flight mass spectrometer, then start the air pump and go into the thermos with gas pump, during gas gets into time of flight mass spectrometer through the thermos and take the material of the intraductal release of infiltration, because the infiltration pipe can be adjusted according to the temperature and the gas flow of thermos, can realize the settlement of maring appearance gas through observing the flowmeter and setting for the temperature in the thermos, accomplish the back of maring, through mark ooff valve locking, then open other introduction passageway of time of flight mass spectrometer and detect can. The mode does not need to disassemble and assemble the pipeline for many times, and the problem of pollution caused by sharing one sample inlet is avoided.
Preferably, an electric heating device is arranged in the vacuum flask, the end part of the electric heating device is arranged outside the shell of the vacuum flask and is electrically connected with a temperature controller through a cable, and the temperature controller is used for controlling the temperature of the electric heating device and ensuring that the temperature in the vacuum flask is in a set range. Through the settable form of temperature controller, can make this a device for external standard ration of time of flight mass spectrum adapt to different temperature environment, no matter can be applicable in the higher south of temperature or very low north of temperature, do not influenced by ambient temperature.
Preferably, a temperature sensor is further arranged in the vacuum flask, and the temperature sensor is also electrically connected with the temperature controller through the cable. The temperature sensor is used for detecting the temperature value in the vacuum flask so as to facilitate the adjustment of the temperature controller and meet the requirement of preset temperature value.
Preferably, the temperature sensor is a thermocouple sensor. The thermocouple sensor is a mature sensor, has low cost, high precision and wide measurement range, and is suitable for the occasions.
Preferably, the temperature controller comprises a single chip microcomputer, the single chip microcomputer is integrated with an analog/digital conversion unit and a PWM (pulse width modulation) module, and the output end of the temperature sensor is connected with the input end of the analog/digital conversion unit;
the electric heating device is connected with the output end of the PWM module. The electric heating device is controlled by a PWM mode, the end voltage of the electric heating device can be controlled very accurately, and high-precision temperature control can be realized by combining the feedback of the temperature sensor.
Preferably, the electric heating device is a resistance wire. The resistance wire is one of the most common heating parts, and the adopted material is easy to purchase, low in cost and easy to control, so that the hardware cost of the device is further reduced.
Preferably, the resistance wire is arranged in the vacuum flask in a surrounding manner. The surrounding arrangement can make the temperature uniform and the heating speed fast.
Preferably, the time-of-flight mass spectrometer is the time-of-flight mass spectrometer that has two way introduction ports, first introduction port with be used for the time-of-flight mass spectrometer external standard ration device to connect, the second introduction port passes through the pipeline and is connected with the one end that detects the introduction ooff valve, the other end that detects the introduction ooff valve with be detected gas connection. And in actual work, sulfur hexafluoride gas is introduced into the other end of the detection sample injection switch valve for detection.
Preferably, the temperature controller is further provided with a touch screen, the touch screen is electrically connected with the single chip microcomputer, and the touch screen is used for displaying the current temperature value and inputting the preset temperature value.
Preferably, a first exhaust gas discharge valve is further arranged between the air pump and the flow meter;
the vacuum flask and the calibration switch valve are also provided with a second waste gas discharge valve. The first exhaust gas-discharge valve and the second exhaust gas-discharge valve are used to discharge exhaust gas.
The device for the external standard quantity of the time-of-flight mass spectrum comprises an air pump, wherein an air outlet of the air pump is connected with an air inlet of a flow meter through a pipeline; the air outlet of the flowmeter is connected with the air inlet of the thermos bottle through a pipeline; the air outlet of the vacuum flask is connected with the air inlet of the calibration switch valve; the gas outlet of the calibration switch valve is connected with a first sample inlet of the time-of-flight mass spectrometer; a permeation tube is arranged in the vacuum flask. Need carry out the calibration to time of flight mass spectrometer, at first close other introduction passageway of time of flight mass spectrometer, then start the air pump and go into the thermos with gas pump, during gas gets into time of flight mass spectrometer through the thermos and take the material of the intraductal release of infiltration, because the infiltration pipe can be adjusted according to the temperature and the gas flow of thermos, can realize the settlement of maring appearance gas through observing the flowmeter and setting for the temperature in the thermos, accomplish the back of maring, through mark ooff valve locking, then open other introduction passageway of time of flight mass spectrometer and detect can. The mode does not need to disassemble and assemble the pipeline for many times, and the problem of pollution caused by sharing one sample inlet is avoided. The whole device has the advantages of simple structure, low cost, convenient operation and wide popularization prospect.
Drawings
FIG. 1 is a schematic diagram of an overall architecture of an embodiment provided herein;
fig. 2 is a schematic diagram of an overall structure of a second embodiment provided in the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be described in detail and completely with reference to fig. 1 and 2 of the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive work based on the embodiments in the present application are within the scope of protection of the present application. Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
As shown in figure 1, the device for external calibration of time-of-flight mass spectrometry comprises an air pump 1, a flowmeter 2, a vacuum flask 3 and a calibration switch valve 5. The gas outlet of air pump 1 pass through the pipeline with the air inlet of flowmeter 2 is connected, the gas outlet of flowmeter 2 pass through the pipeline with the air inlet of thermos 3 is connected, the gas outlet of thermos 3 with the air inlet of demarcation ooff valve 5 is connected, the gas outlet of demarcation ooff valve 5 is connected with the first introduction port of flight time mass spectrometer 7, the infiltration pipe 4 has been placed to the thermos 3 in. The permeate tube is a small inert vessel containing two balanced pure chemicals. It may be in a gas/liquid phase or a gas/solid phase. At a constant temperature, the contents of the permeate tube permeate outwardly through the permeate site at a rate. The permeate tube was inserted into a carrier gas stream to produce the concentration required for the test. For calibrating gas analyzer systems, hazardous gas alarm testing, long term research of materials and biological systems, and any application where stable trace concentrations are required. The tubular permeate tube seals the desired permeate gas within the permeate tube. Are widely used in various osmotic devices. The end is impervious to the outside penetration through all the tube wall length of the penetration tube. The permeability can vary widely depending on the length and wall thickness of the permeate channel, and is typically between 5 ng/min and 50000 ng/min. The effective permeate length (the section where the permeate occurs) of the permeate channel is between 0.5cm and 20 cm. The long permeate tube is made up of a standard permeate tube and an impermeable stainless steel container. Such permeate tubes can provide the desired permeability, but have a greatly improved life. The service life of the permeation tube can be improved by 3 times for the effective permeation length of 5cm, and can be improved by 12 times for the effective permeation length of 1 cm.
Need carry out the calibration to time of flight mass spectrometer, at first close other introduction of sample passageway of time of flight mass spectrometer, then start air pump 1 with the gas pump go into thermos 3, gas gets into time of flight mass spectrometer 7 through thermos 3 and take the material of release in the infiltration pipe 4, because infiltration pipe 4 can be adjusted according to the temperature and the gas flow of thermos 3, can realize the settlement of maring the appearance gas through observing flowmeter 2 and setting for the temperature in the thermos 3, accomplish the back of maring, lock through demarcation ooff valve 5, then open other introduction of sample passageway of time of flight mass spectrometer and detect can. The mode does not need to disassemble and assemble the pipeline for many times, and the problem of pollution caused by sharing one sample inlet is avoided.
In order to better realize control, an electric heating device is arranged in the vacuum flask 3, the end part of the electric heating device is arranged outside the shell of the vacuum flask 3 and is electrically connected with a temperature controller 6 through a cable, and the temperature controller 6 is used for controlling the temperature of the electric heating device and ensuring that the temperature inside the vacuum flask 3 is in a set range. Through the settable form of temperature controller 6, can make this a device for external standard ration of time of flight mass spectrum adapt to different temperature environment, no matter can be applicable in the south that the temperature is higher or very low north, not influenced by ambient temperature. And a temperature sensor is also arranged in the vacuum flask 3 and is electrically connected with the temperature controller 6 through the cable. The temperature sensor is used for detecting the temperature value in the vacuum flask 3 so as to facilitate the adjustment of the temperature controller 6 and meet the requirement of preset temperature value. The temperature sensor is a thermocouple sensor. The thermocouple sensor is a mature sensor, has low cost, high precision and wide measurement range, and is suitable for the occasions. The temperature controller 6 comprises a single chip microcomputer, the single chip microcomputer is integrated with an analog/digital conversion unit and a PWM (pulse width modulation) module, and the output end of the temperature sensor is connected with the input end of the analog/digital conversion unit. The electric heating device is connected with the output end of the PWM module. The electric heating device is controlled by a PWM mode, the end voltage of the electric heating device can be controlled very accurately, and high-precision temperature control can be realized by combining the feedback of the temperature sensor.
The electric heating device is a resistance wire. The resistance wire is one of the most common heating parts, and the adopted material is easy to purchase, low in cost and easy to control, so that the hardware cost of the device is further reduced.
The resistance wire is arranged in the vacuum flask 3 in a surrounding manner. The surrounding arrangement can make the temperature uniform and the heating speed fast.
The time-of-flight mass spectrometer 7 is the time-of-flight mass spectrometer that has two way introduction ports, first introduction port with be used for the time-of-flight mass spectrometer external standard ration device to connect, the second introduction port passes through the pipeline to be connected with the one end that detects introduction ooff valve 8, detects the other end of introduction ooff valve 8 and is detected gas connection. In actual operation, sulfur hexafluoride (SF) is introduced into the other end of the detection sample injection switch valve 86And (5) detecting the gas.
The temperature controller 6 is also provided with a touch screen which is electrically connected with the single chip microcomputer and used for displaying the current temperature value and inputting the preset temperature value.
Example two
As shown in fig. 2, in addition to the first embodiment, a first waste gas discharge valve 12 is further disposed between the air pump 1 and the flow meter 2, and a second waste gas discharge valve 45 is further disposed between the thermos 3 and the calibration switch valve 5. The first exhaust gas-discharge valve 12 and the second exhaust gas-discharge valve 45 are used to discharge exhaust gas.
The device for the external standard quantity of the time-of-flight mass spectrum comprises an air pump 1, wherein an air outlet of the air pump 1 is connected with an air inlet of a flow meter 2 through a pipeline; the air outlet of the flowmeter 2 is connected with the air inlet of the thermos bottle 3 through a pipeline; the air outlet of the vacuum flask 3 is connected with the air inlet of the calibration switch valve 5; the air outlet of the calibration switch valve 5 is connected with a first sample inlet of a time-of-flight mass spectrometer 7; a permeation tube 4 is arranged in the vacuum flask 3. Need carry out the calibration to time of flight mass spectrometer, at first close other introduction of sample passageway of time of flight mass spectrometer, then start air pump 1 with the gas pump go into thermos 3, gas gets into time of flight mass spectrometer 7 through thermos 3 and take the material of release in the infiltration pipe 4, because infiltration pipe 4 can be adjusted according to the temperature and the gas flow of thermos 3, can realize the settlement of maring the appearance gas through observing flowmeter 2 and setting for the temperature in the thermos 3, accomplish the back of maring, lock through demarcation ooff valve 5, then open other introduction of sample passageway of time of flight mass spectrometer and detect can. The mode does not need to disassemble and assemble the pipeline for many times, and the problem of pollution caused by sharing one sample inlet is avoided. The whole device has the advantages of simple structure, low cost, convenient operation and wide popularization prospect.
Claims (10)
1. A device for external calibration of time-of-flight mass spectrometry is characterized by comprising an air pump (1), a flowmeter (2), a vacuum flask (3) and a calibration switch valve (5);
the air outlet of the air pump (1) is connected with the air inlet of the flowmeter (2) through a pipeline;
the air outlet of the flowmeter (2) is connected with the air inlet of the vacuum flask (3) through a pipeline;
the air outlet of the vacuum flask (3) is connected with the air inlet of the calibration switch valve (5);
the gas outlet of the calibration switch valve (5) is connected with a first sample inlet of a flight time mass spectrometer (7);
a permeation tube (4) is arranged in the vacuum flask (3).
2. The apparatus for time-of-flight mass spectrometry external calibration quantification of claim 1, wherein:
an electric heating device is arranged in the vacuum flask (3), the end of the electric heating device is arranged outside the shell of the vacuum flask (3) and is electrically connected with a temperature controller (6) through a cable, and the temperature controller (6) is used for controlling the temperature of the electric heating device to ensure that the temperature inside the vacuum flask (3) is in a set range.
3. The apparatus for time-of-flight mass spectrometry external calibration quantification of claim 2, wherein:
and a temperature sensor is also arranged in the vacuum flask (3), and the temperature sensor is also electrically connected with the temperature controller (6) through the cable.
4. The apparatus of claim 3 for time-of-flight mass spectrometry external calibration quantities, wherein:
the temperature sensor is a thermocouple sensor.
5. The apparatus of claim 3 for time-of-flight mass spectrometry external calibration quantities, wherein:
the temperature controller (6) comprises a single chip microcomputer, the single chip microcomputer is integrated with an analog/digital conversion unit and a PWM (pulse width modulation) module, and the output end of the temperature sensor is connected with the input end of the analog/digital conversion unit;
the electric heating device is connected with the output end of the PWM module.
6. The apparatus of claim 3 for time-of-flight mass spectrometry external calibration quantities, wherein:
the electric heating device is a resistance wire.
7. The apparatus of claim 6 for time-of-flight mass spectrometry external calibration quantities, wherein:
the resistance wire is arranged in the vacuum flask (3) in a surrounding manner.
8. The apparatus for time-of-flight mass spectrometry external calibration quantification of claim 1, wherein:
the time-of-flight mass spectrometer (7) is the time-of-flight mass spectrometer that has two way introduction ports, first introduction port with be used for the time-of-flight mass spectrometer external standard quantitative device to connect, the second introduction port passes through the pipeline to be connected with the one end that detects introduction ooff valve (8), the other end that detects introduction ooff valve (8) with be detected gas connection.
9. The apparatus of claim 5 for time-of-flight mass spectrometry external calibration quantities, wherein:
the temperature controller (6) is also provided with a touch screen, the touch screen is electrically connected with the single chip microcomputer, and the touch screen is used for displaying the current temperature value and inputting a preset temperature value.
10. The apparatus for time-of-flight mass spectrometry external calibration quantification of claim 1, wherein:
a first waste gas discharge valve (12) is also arranged between the air pump (1) and the flowmeter (2);
the vacuum flask (3) and the calibration switch valve (5) are also provided with a second waste gas discharge valve (45).
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| CN202111252934.0A CN113964015A (en) | 2021-10-27 | 2021-10-27 | Device for external standard quantification of time-of-flight mass spectrum |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105954441A (en) * | 2016-06-08 | 2016-09-21 | 浙江富春江环保科技研究有限公司 | System for on-line detection of dioxin type trace organic pollutants in actual smoke |
| CN106384707A (en) * | 2016-10-26 | 2017-02-08 | 广西电网有限责任公司电力科学研究院 | Windowless radio-frequency vacuum ultraviolet lamp mass spectrometry ionization source |
| CN212301412U (en) * | 2020-09-08 | 2021-01-05 | 南京大学 | Calibration system based on nitric acid chemical ionization time-of-flight mass spectrometer |
| CN112557591A (en) * | 2020-11-16 | 2021-03-26 | 中国科学院工程热物理研究所 | Dynamic mixed gas full-component flow calibration system and calibration method |
| CN112951700A (en) * | 2019-12-11 | 2021-06-11 | 中国科学院大连化学物理研究所 | Single-path double-calibration mass spectrum sample introduction device and method |
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2021
- 2021-10-27 CN CN202111252934.0A patent/CN113964015A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105954441A (en) * | 2016-06-08 | 2016-09-21 | 浙江富春江环保科技研究有限公司 | System for on-line detection of dioxin type trace organic pollutants in actual smoke |
| CN106384707A (en) * | 2016-10-26 | 2017-02-08 | 广西电网有限责任公司电力科学研究院 | Windowless radio-frequency vacuum ultraviolet lamp mass spectrometry ionization source |
| CN112951700A (en) * | 2019-12-11 | 2021-06-11 | 中国科学院大连化学物理研究所 | Single-path double-calibration mass spectrum sample introduction device and method |
| CN212301412U (en) * | 2020-09-08 | 2021-01-05 | 南京大学 | Calibration system based on nitric acid chemical ionization time-of-flight mass spectrometer |
| CN112557591A (en) * | 2020-11-16 | 2021-03-26 | 中国科学院工程热物理研究所 | Dynamic mixed gas full-component flow calibration system and calibration method |
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