CN108226267B - Split type thermal analysis sampling device - Google Patents
Split type thermal analysis sampling device Download PDFInfo
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- CN108226267B CN108226267B CN201710453857.2A CN201710453857A CN108226267B CN 108226267 B CN108226267 B CN 108226267B CN 201710453857 A CN201710453857 A CN 201710453857A CN 108226267 B CN108226267 B CN 108226267B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
- G01N27/622—Ion mobility spectrometry
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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
- H01J49/049—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 with means for applying heat to desorb the sample; Evaporation
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Abstract
The invention relates to a sample injection device in an analysis instrument, in particular to a split type thermal analysis sample injection device, which is characterized in that: the split type thermal analysis sampling device is of a split type structure and mainly comprises a gas heating flow guiding part and a thermal analysis cavity upper cover part, wherein the gas heating flow guiding part and the thermal analysis cavity upper cover part are fixedly combined to form the thermal analyzer, and the thermal analysis cavity is positioned between the gas heating flow guiding part and the thermal analysis cavity upper cover. The split type thermal analysis device provided by the invention can realize the function of converting a sample from a solid phase and a liquid phase into a gas phase and introducing the gas phase into an analysis instrument for detection; meanwhile, complicated electronic accessories such as an electromagnetic valve and a stepping motor are not needed, the failure rate is low, the size is small, the structure is simple, and the disassembly and the washing are convenient.
Description
Technical Field
The invention relates to a sample injection device in an analytical instrument, in particular to a device for converting solid and liquid samples into gas samples so as to realize sample injection.
Background
Ion mobility spectrometry (Ion Mobility Spectrometry, IMS) technology is an analytical detection technology that emerged in the 70 s of the 20 th century, and was applied to in-situ analytical detection in the 80 s, the basic principle of which is: under the atmospheric pressure condition, the sample to be detected is ionized to form ions, and the generated ions move under the action of the external electric field force. In the weak electric field (less than 1000V/cm), the movement speed of the ions is proportional to the electric field intensity, v=ke, where V is the speed of the ions, E is the electric field intensity, K is the ion mobility, the mobility of the ions is constant in the weak electric field, the value of the mobility is mainly dependent on factors such as the structure, mass, charge number and tail gas type of the ions, and the values of the mobility of different ions are different. In this way, the composition of the sample can be deduced from the measured migration times. Meanwhile, quantitative calculation can be performed according to the proportional relation between the logarithmic value of the concentration and the peak area.
According to the principle of IMS, IMS is mainly applicable to the detection of gas samples. However, in practical applications, such as the field of detecting explosives and drugs in which IMS is widely used, most of the samples of explosives or drugs are in a solid phase or a liquid phase, so how to effectively and rapidly convert the samples from the solid phase or the liquid phase into the gas phase and introduce the gas phase into an IMS system for detection is one of the problems to be overcome in the practical application of IMS. Among the methods for solving this problem, the thermal analysis method is a sample introduction method which is more widely used. Such as patents 200710011082.X, NC 204088259U, NC 203587603U, 200720073380. X, and CN103163013A are all thermal analysis plus gas flow purges that are used. Although the methods can realize the functions of rapidly converting a sample from a solid phase or a liquid phase into a gas phase and introducing the gas phase into an IMS system for detection, the methods all require complex electronic accessories, such as electromagnetic valves, stepping motors and the like, and the injector has large volume, complex electronic accessories and high failure rate; and the thermal analysis cavity is an integral body, so that the thermal analysis cavity is not easy to clean after pollution. Therefore, the novel split type thermal analysis sampling device is provided, complicated accessories such as an electromagnetic valve and a stepping motor are not needed, the size is small, the failure rate is low, and the thermal analysis cavity can be detached and is convenient to clean.
Disclosure of Invention
The invention aims to provide a split type thermal analysis sampling device which can realize the function of converting a sample from a solid phase to a liquid phase and introducing the solid phase and the liquid phase into an IMS system for detection, and meanwhile, has the advantages of small volume, no need of complex electronic accessories, low failure rate and convenience in disassembly and washing.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a split type thermal analysis sampling device is characterized in that: the split type thermal analysis sampling device comprises a gas heating flow guiding part and a thermal analysis cavity upper cover part, wherein the thermal analysis cavity upper cover part is detachably combined with the gas heating flow guiding part (1) and is provided with a thermal analysis cavity for accommodating a sample attaching plate.
Specifically, the gas heating guide part comprises a gas heating guide main body and a gas inlet, a gas outlet and a gas guide groove, wherein the gas inlet is arranged on the gas heating guide main body, the gas guide groove is sunken in the gas heating guide part (1) or is highlighted on the gas heating guide part, and the gas inlet, the gas guide groove and the gas outlet are sequentially communicated.
Specifically, the upper cover part of the thermal analysis cavity is provided with a convex or concave cavity body which is used for being matched with the gas heating diversion part.
Preferably, the gas heating flow guiding part and the upper cover part of the thermal analysis cavity are combined together, and a slit for inserting the sample attaching piece is formed between the gas heating flow guiding part and the upper cover part.
Specifically, the gas heating flow guiding part and the upper cover part of the thermal analysis cavity are combined together to form a split type thermal analysis sample injection device, a heating device is further arranged in the split type thermal analysis sample injection device, and the periphery of the split type thermal analysis sample injection device is wrapped with a heat preservation device.
Preferably, the split type thermal analysis sampling device is further provided with a temperature control device for controlling the temperature of the thermal analysis cavity to be 100-300 ℃.
When the split type thermal analysis sample injection device works, purified sample carrier gas enters the gas heating flow guiding part through the gas inlet and is heated, and the heated carrier gas flows through the gas flow guiding groove and enters the detection system through the gas outlet. After the sample attaching plate is inserted into the sample groove, the sample attached to the sample attaching plate is heated and resolved by the thermal resolving cavity, and the resolved sample gas is carried out by the sample carrier gas flowing through the sample attaching plate and is sent to the instrument for detection and analysis.
The invention has the advantages that:
the split type thermal analysis sampling device disclosed by the invention has the functions of converting a sample from a solid phase and a liquid phase into a gas phase and introducing the gas phase into an IMS system for detection;
the split type thermal analysis sample injection device does not need complex electronic accessories such as an electromagnetic valve, a stepping motor and the like, greatly reduces the failure rate, and simultaneously has a small volume due to a simple structure.
The split type thermal analysis sampling device provided by the invention has the advantages that the thermal analyzer is of a detachable combined structure, and the thermal analysis cavity is convenient to clean.
Drawings
Fig. 1 is a schematic structural view of a split type thermal analysis device according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a gas heating diversion section in fig. 1.
Fig. 3 is a schematic view of the structure of the upper cover part of the thermal analysis chamber in fig. 1.
Detailed Description
The technical scheme of the invention is further specifically described below by examples and with reference to the accompanying drawings. The following description of embodiments of the present invention with reference to the accompanying drawings is intended to illustrate the general inventive concept and should not be taken as limiting the invention alone.
Referring to fig. 1 to 3, the split thermal analysis device includes: the gas heating flow guiding part (1) and the thermal desorption cavity upper cover part (2) are fixedly combined together to form the split thermal desorption device (3) of the invention. In order to achieve the effect of thermal desorption, the temperature of the thermal desorption device must be maintained at 100 to 300 ℃. Therefore, the device is also provided with a heating device (302) and a temperature control device (303). The heating device (302) can be a heating material such as a heating rod or a heating film, and can realize rapid heating of the thermal analyzer. Meanwhile, in order to keep the temperature constant, the thermal analysis device should also be wrapped with a thermal insulation device, such as a thermal insulation material of quartz cotton, at the periphery.
Referring to fig. 1, the gas heating guide part (1) includes a gas inlet (101), a gas outlet (102), and a gas guide groove (103). The sample carrier gas enters from the gas inlet (101) and is heated, and the heated gas flows through the diversion trench, flows out from the gas outlet (102) and enters the analysis instrument. The purpose of the channel (103) is to increase the gas flow path and increase the gas heating time, which can be in various shapes, and the illustration is only one of the shapes. Meanwhile, it should be noted that there is no gas diversion trench, and the gas diversion trench may be just a whole that is concave or protruding.
Referring to fig. 2, the thermal analysis chamber upper cover part (2) includes a convex or concave chamber body (201) for cooperation with the gas heating guide part (1), and the guide grooves of the gas heating guide part (1) are mutually matched to form a thermal analysis chamber.
Referring to fig. 1, the sample attachment plate is introduced into the thermal analysis chamber through a sample introduction slit of the split thermal analysis device. The sample introduction slit can be opened on the upper cover part (2) of the thermal analysis cavity as shown in fig. 1, and can also be opened on the gas heating diversion part (1) (when the gas diversion trench is sunken on the gas diversion part (1)).
Referring to fig. 1, when a sample attaching plate to which a sample is attached is inserted into a thermal analysis chamber through a sample introduction slit, the sample is heated and analyzed at a high temperature, and the analyzed sample gas is carried out by clean hot air flowing through a flow guide groove and enters an analysis instrument such as an ion mobility spectrometer for detection and analysis.
Claims (3)
1. A split type thermal analysis sampling device is characterized in that: the split type thermal analysis sample injection device consists of a gas heating guide part (1) and a thermal analysis cavity upper cover part (2), the thermal analysis cavity upper cover part and the gas heating guide part (1) are detachably combined and form a thermal analysis cavity for accommodating a sample attachment plate,
the gas heating diversion part (1) comprises a gas heating diversion main body and a gas inlet (101) arranged on the gas heating diversion main body, a gas outlet (102) and a gas diversion groove (103), wherein the gas diversion groove (103) is sunken in the gas heating diversion part (1) or is highlighted on the gas heating diversion part (1), the gas inlet (101), the gas diversion groove (103) and the gas outlet (102) are sequentially communicated,
the upper cover part (2) of the thermal analysis cavity is provided with a convex or concave cavity (201) which is used for being matched with the gas heating diversion part (1),
the gas heating flow guiding part (1) and the thermal analysis cavity upper cover part (2) are combined together, and a slit (301) for inserting a sample attaching plate is formed between the gas heating flow guiding part and the thermal analysis cavity upper cover part.
2. The split thermal analysis sample injection device of claim 1, wherein: the gas heating flow guiding part (1) and the thermal analysis cavity upper cover part (2) are combined together to form a split type thermal analysis sample injection device (3), a heating device (302) is further arranged in the split type thermal analysis sample injection device (3), and the periphery of the split type thermal analysis sample injection device (3) is wrapped with a heat preservation device.
3. The split thermal analysis sample injection device of claim 1, wherein: the split type thermal analysis sample injection device is further provided with a temperature control device (303) for controlling the temperature of the thermal analysis cavity to be 100-300 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710453857.2A CN108226267B (en) | 2017-06-15 | 2017-06-15 | Split type thermal analysis sampling device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710453857.2A CN108226267B (en) | 2017-06-15 | 2017-06-15 | Split type thermal analysis sampling device |
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| CN108226267A CN108226267A (en) | 2018-06-29 |
| CN108226267B true CN108226267B (en) | 2023-09-12 |
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| CN112924528A (en) * | 2019-12-06 | 2021-06-08 | 中国科学院大连化学物理研究所 | Sample injector for ion mobility spectrometry flash thermal analysis |
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| WO1999041601A1 (en) * | 1998-02-11 | 1999-08-19 | Haley Lawrence V | Hand-held detection system using gc/ims |
| CN101294933A (en) * | 2007-04-24 | 2008-10-29 | 中国科学院大连化学物理研究所 | Surface gas flow purging thermal desorption sampling device |
| CN101900706A (en) * | 2009-05-25 | 2010-12-01 | 同方威视技术股份有限公司 | Sample injector |
| CN103163013A (en) * | 2011-12-15 | 2013-06-19 | 中国科学院大连化学物理研究所 | Thermal analysis and permeable membrane compound device for solid and liquid sample injection |
| CN203192749U (en) * | 2013-04-16 | 2013-09-11 | 苏州微木智能系统有限公司 | Sample introduction device of ion mobility spectrometry detection system |
| CN103675082A (en) * | 2012-09-13 | 2014-03-26 | 中国科学院大连化学物理研究所 | Sample introduction device for improving detection sensitivity of ion mobility spectrometry (IMS) |
| CN204088259U (en) * | 2014-09-25 | 2015-01-07 | 中国科学院大连化学物理研究所 | A kind of sampling device be separated with parsing for the preheating of ion mobility spectrometry |
| WO2015007217A1 (en) * | 2013-07-17 | 2015-01-22 | Duan Xuchuan | Element analysis method and injection device making use of organic cracking to cause an element to form a volatile |
| CN106525523A (en) * | 2017-01-03 | 2017-03-22 | 公安部第研究所 | Thermo-analysis sampler for ion mobility spectrometer |
| CN206788103U (en) * | 2017-06-15 | 2017-12-22 | 深圳市天和时代电子设备有限公司 | A kind of split type thermal desorption sampling device |
-
2017
- 2017-06-15 CN CN201710453857.2A patent/CN108226267B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999041601A1 (en) * | 1998-02-11 | 1999-08-19 | Haley Lawrence V | Hand-held detection system using gc/ims |
| CN101294933A (en) * | 2007-04-24 | 2008-10-29 | 中国科学院大连化学物理研究所 | Surface gas flow purging thermal desorption sampling device |
| CN101900706A (en) * | 2009-05-25 | 2010-12-01 | 同方威视技术股份有限公司 | Sample injector |
| CN103163013A (en) * | 2011-12-15 | 2013-06-19 | 中国科学院大连化学物理研究所 | Thermal analysis and permeable membrane compound device for solid and liquid sample injection |
| CN103675082A (en) * | 2012-09-13 | 2014-03-26 | 中国科学院大连化学物理研究所 | Sample introduction device for improving detection sensitivity of ion mobility spectrometry (IMS) |
| CN203192749U (en) * | 2013-04-16 | 2013-09-11 | 苏州微木智能系统有限公司 | Sample introduction device of ion mobility spectrometry detection system |
| WO2015007217A1 (en) * | 2013-07-17 | 2015-01-22 | Duan Xuchuan | Element analysis method and injection device making use of organic cracking to cause an element to form a volatile |
| CN204088259U (en) * | 2014-09-25 | 2015-01-07 | 中国科学院大连化学物理研究所 | A kind of sampling device be separated with parsing for the preheating of ion mobility spectrometry |
| CN106525523A (en) * | 2017-01-03 | 2017-03-22 | 公安部第研究所 | Thermo-analysis sampler for ion mobility spectrometer |
| CN206788103U (en) * | 2017-06-15 | 2017-12-22 | 深圳市天和时代电子设备有限公司 | A kind of split type thermal desorption sampling device |
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