CN202282883U - Microwave medium heating pipe - Google Patents
Microwave medium heating pipe Download PDFInfo
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- CN202282883U CN202282883U CN2011203547017U CN201120354701U CN202282883U CN 202282883 U CN202282883 U CN 202282883U CN 2011203547017 U CN2011203547017 U CN 2011203547017U CN 201120354701 U CN201120354701 U CN 201120354701U CN 202282883 U CN202282883 U CN 202282883U
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- microwave
- medium
- heating tube
- medium heating
- heating
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Abstract
The present utility model relates to preparation and application of a microwave medium heating pipe. The microwave medium heating pipe is prepared by a glass pipe and microwave medium and used for heating samples, thus roles of the microwave medium in microwave heating sample processing can be greatly developed, and utilization rate and conversion rate of microwave energy can be enhanced. In application of microwave heating processing (microwave extraction, microwave derivative and microwave digestion), advantages of high efficiency, energy saving and environmental protection of microwave can be better developed.
Description
Technical field
A kind of preparation and application thereof of microwave-medium heating tube have been the present invention relates to.
Background technology
Why microwave can bring into play significant role in chemical field research, its main cause is because microwave has unique heating effect, promptly is different from " the body heating " fast of traditional hot conduction mode.Advantages such as this " body heating " has fast, homogeneous, no hysteresis effect can shorten processes such as sample pre-treatments, chemical synthesis, accelerate processing procedure." but body heating " only to polar substances and the material with high dielectric property, " body heating " can't take place in apolar substance etc. under microwave field, and this makes the application of microwave have limitation.In addition, even if produced " body heating ", different material also has different microwave absorbing property; Under same microwave field; Some material heats up very fast, and some material heats up then slower, and the efficient that at this moment changes into heat energy for those slower material microwave energies that heat up is very low.So, utilize solvent, reactant or thing to be extracted to absorb the characteristics that microwave can not fully be brought into play the microwave Fast Heating singlely, the microwave energy utilance is lower.
Summary of the invention
The present invention proposes in the problems referred to above, and purpose provides a kind of microwave-medium heating tube, and it can be heated nonpolar sample and solvent in the Microwave Treatment system.
One of characteristic of the present invention is that said microwave-medium heating tube contains: glass tube and microwave-medium.
Two of characteristic of the present invention is that said microwave-medium heating tube contains: glass tube and microwave-medium, microwave-medium is wrapped in the glass tube.
Characteristic of the present invention also is: the length range of the glass tube of said microwave-medium heating tube is 1-4cm, and the external diameter scope is 0.5-1cm.The state of the microwave-medium of described microwave-medium heating tube is solid-state, and the material of microwave-medium itself is Powdered, and described microwave-medium is a graphite, and the mass range of graphite is 0.2-0.5g.
If in such a manner, use this microwave-medium heating tube to change the speed of microwave-assisted treatment progress, can be accelerated completion from intensification speed and the treatment progress that changes the sample system in fact.
Above-mentioned microwave-medium heating tube can reclaim and reuse or disposable use after sample treatment finishes.
According to such method, microwave-medium is wrapped in the pipe of glass or quartzy material, the length of heating tube is about 3cm, and external diameter is about 0.9cm, and the quality of filling microwave-medium (graphite) in the heating tube is about 0.4g.
The size of heating tube and external diameter can increase or dwindle (but need be immersed in the sample fully) according to actual needs, but generally, the heating tube external diameter should be less than 0.5cm (the meticulous microwave-medium that causes not be loaded inadequately, and heats is not obvious).Heating tube quantity can increase or reduce as required.
If do like this, require microwave-medium to select the material of powdery, be difficult for during filling filling up with too tight, when preventing microwave irradiation, the intensification explosion.
If do like this that described microwave-medium heating tube can be used for Microwave Extraction, microwave is derived and system such as micro-wave digestion.
Description of drawings
Shown in Figure 1 is the sketch map of microwave-medium heating tube, and graphite powder (1) is wrapped in the glass tube (2).
Shown in Figure 2 is to utilize the microwave-medium heating tube to carry out the GC-MS chromatogram that microwave quickens to extract organophosphorus pesticide in the apple.
1, thimet 2, diazinon 3, tolelofos-methyl 4, malathion
Embodiment
Embodiment 1
The 0.4g powdered graphite is sealed in the glass tube of 3cm, utilizes 3 these microwave-medium heating tubes can in 50s, make the 25mL n-hexane reach 70 ℃.According to identical method, the 0.4g carbonyl iron dust is sealed in the glass tube of 3cm, glass tube is easier to take place explosion.
Embodiment 2
The length of glass tube is about 3cm, and external diameter is about 0.9cm, if external diameter is too little, the amount of filling graphite is very few, does not have tangible heats, if glass tube length is oversize, can not immerse fully in the solution, can cause the glass tube explosion.
Embodiment 3
Microwave-medium is auxiliary-and the non-polar solven microwave quickens organophosphorus pesticide in the extraction and determination apple
Accurately take by weighing the fresh apple sample of 3.0g, add anhydrous sodium sulfate drying, place the polytetrafluoroethylene extractor, add 3 microwave-medium heating tubes, the 25mL n-hexane extracts.With the optic fiber thermometer thermometric, 70 ℃ of temperature, extraction time 8min are got in control.Be cooled to room temperature, extract is rotated evaporation after filtering, and adds 1mL n-hexane dissolution residue, crosses 0.22 μ m filter membrane.Get 1 μ L and carry out gas chromatography-mass spectrum mensuration.
Claims (7)
1. a microwave-medium heating tube is characterized in that, said microwave-medium heating tube contains: glass tube and microwave-medium, microwave-medium is wrapped in the glass tube.
2. according to the described a kind of microwave-medium heating tube of claim 1, it is characterized in that the state of the microwave-medium of described microwave-medium heating tube is solid-state.
3. according to any one described a kind of microwave-medium heating tube in claim 1 or 2, it is characterized in that the state of the microwave-medium of described microwave-medium heating tube is solid-state, the material of microwave-medium itself is Powdered.
4. according to any one described a kind of microwave-medium heating tube in claim 1 or 2, it is characterized in that the state of the microwave-medium of described microwave-medium heating tube is solid-state, the material of microwave-medium itself is Powdered, and described microwave-medium is a graphite.
5. according to any one described a kind of microwave-medium heating tube in claim 1 or 2; It is characterized in that; The state of the microwave-medium of described microwave-medium heating tube is solid-state; The material of microwave-medium itself is Powdered, and described microwave-medium is a graphite, and the mass range of graphite is 0.2-0.5g.
6. according to any one described a kind of microwave-medium heating tube in claim 1 or 2, it is characterized in that the length range of the glass tube of said microwave-medium heating tube is 1-4cm.
7. according to any one described a kind of microwave-medium heating tube in claim 1 or 2, it is characterized in that the external diameter scope of said microwave-medium heating tube is 0.5-1cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203547017U CN202282883U (en) | 2011-09-21 | 2011-09-21 | Microwave medium heating pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203547017U CN202282883U (en) | 2011-09-21 | 2011-09-21 | Microwave medium heating pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202282883U true CN202282883U (en) | 2012-06-20 |
Family
ID=46229030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203547017U Expired - Fee Related CN202282883U (en) | 2011-09-21 | 2011-09-21 | Microwave medium heating pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202282883U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510594A (en) * | 2011-09-21 | 2012-06-20 | 吉林大学 | Microwave medium heating tube |
-
2011
- 2011-09-21 CN CN2011203547017U patent/CN202282883U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510594A (en) * | 2011-09-21 | 2012-06-20 | 吉林大学 | Microwave medium heating tube |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120620 Termination date: 20120921 |