CN202762128U - Automatic reflux-type extracting device - Google Patents
Automatic reflux-type extracting device Download PDFInfo
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- CN202762128U CN202762128U CN 201220042926 CN201220042926U CN202762128U CN 202762128 U CN202762128 U CN 202762128U CN 201220042926 CN201220042926 CN 201220042926 CN 201220042926 U CN201220042926 U CN 201220042926U CN 202762128 U CN202762128 U CN 202762128U
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Abstract
The utility model discloses an automatic reflux-type extracting device. The device adopts the structure of the upper end of the device is connected with a reflux condensing pipe (1), and the lower end is connected with a round-bottom flask (6) for containing solvent; a long cylindrical extracting tank (2) is connected between the reflux condensing pipe (1) and the flask (6); a glass filter sheet (3) is arranged at the lower end inside the extracting tank (2); and the glass filter sheet (3) is further connected with a communication pipe (4) for preventing siphoning and a U-shaped reflux pipe (5) for keeping the liquid surface level at the lower part of the extracting tank (2). The device disclosed by the utility model is reasonable in structure, particularly suitable for continuously distilling and extracting solid powder, and is convenient to use. The extracting device utilizes the a water bath or an electric heating jacket to heat the round-bottom flask (6) so as to boil the solvent; and steam rises up and then drops into the extractor (2) after condensation so as to soak and extract a sample.
Description
Technical field
The utility model relates to the Pesticide Residues in Tobacco technical field of analysis and detection, relates to specifically a kind of auto back flow pattern extraction element for analyzing Residual Levels of Organochlorine Pesticides, and this device also can be widely used in the extraction of solid sample.
Background technology
Mention a kind of pretreating device in the national standard (the mensuration gas chromatography of GB-T 13596-2004 tobacco and tobacco product Residual Levels of Organochlorine Pesticides), this device is mainly used in Organic pesticide residues in tobacco and the tobacco product is extracted, leaching process requires to keep the extract liquid level all the time on test portion, therefore in the bottom of device a cock has been installed, utilize the aperture size of cock that back-flow velocity and distillation condensation rate are consistent, thereby reach the purpose of uninterrupted extraction.But in use there are some shortcomings in this device: when the condensation rate of extract during greater than back-flow velocity, what extract will be from the top is open closed to the round-bottomed flask of below, thereby pollutes extract, affects measurement result.And back-flow velocity is during greater than condensation rate, and extract can all drain off, and greatly affects extraction efficiency.In addition, use this to install general extraction time by long, this just need to often pay close attention in leaching process and extract the state that carries out in order to adjust switch folding size, and is very inconvenient, so the inventor improves for this extraction element.
The utility model content
The purpose of this utility model provides a kind of device that can effectively extract pressed powder, be used for analyzing the extraction equipment of tobacco and tobacco product Residual Levels of Organochlorine Pesticides, this apparatus structure is reasonable, be particularly suitable for the continuous still extraction to solid sample, can well avoid extractant to be drained, make solvent constantly all cover test portion.
The purpose of this utility model is achieved through the following technical solutions:
A kind of auto back flow pattern extraction element, described device upper end connects reflux condensing tube 1, and the lower end connects the round-bottomed flask 6 that fills solvent; Between round-bottomed flask 6 and reflux condensing tube 1, be connected with the extraction pond 2 of a long cartridge type, extract the pond interior lower end and be provided with glass filter disc 3, extract the pond and connect communicating pipe 4 and the U-shaped return duct 5 that can keep liquid level that prevents siphon; The connector in described U-shaped return duct 5 and extraction pond 2 is below glass filter disc 3.
Compared with prior art, the utility model is above design above the U-shaped return duct 5 extends to extractor 2 one communicating pipe 4, this structure can be destroyed the siphonage that U-shaped return duct 5 itself can produce, can well avoid extractant to be drained, make solvent constantly all cover test portion, greatly improved extraction efficiency.
Description of drawings
Accompanying drawing 1 is the utility model auto back flow pattern extraction element structural representation.
The specific embodiment
The utility model is described further in connection with embodiment:
In conjunction with Fig. 1, a kind of auto back flow pattern extraction element, described device upper end connects reflux condensing tube 1, and the lower end connects the round-bottomed flask 6 that fills solvent; Between round-bottomed flask 6 and reflux condensing tube 1, be connected with the extraction pond 2 of a long cartridge type, extract pond 2 interior lower end and be provided with glass filter disc 3, extract pond 2 and connect communicating pipe 4 and the U-shaped return duct 5 that can keep liquid level that prevents siphon; The connector in described U-shaped return duct 5 and extraction pond 2 is below glass filter disc 3.
The operation principle of the utility model extraction element is as follows: solid sample is placed extractor 2, require used test portion height not to be higher than U-shaped return duct 5 tops.Solvent after the heating is back in the extractor 2 through reflux condensing tube 1, when solvent when the liquid level of extractor is higher than U-shaped return duct 5 overhead height, because the law of connected vessels of U-shaped return duct 5, reagent after the extraction is back in the round-bottomed flask 6 from following U-shaped pipe, thereby realizes the purpose of continuous still extraction.
The utility model extraction element upper end connects reflux condensing tube 1, and the lower end connects the round-bottomed flask 6 that fills solvent; By water-bath or electric heating cover heating round-bottomed flask 6, solvent boiling, steam are risen, splash into after being condensed in the extractor 2, at last sample is soaked extraction.
Specific implementation process is as follows:
In the mensuration of tobacco sample Organochlorine Pesticide Residues: take by weighing the 5g sample in the 50mL beaker, be accurate to 0.01g, add the 5g florisil silica, fully mix.In the apparatus,Soxhlet's inner tube, add the 5g florisil silica, then shift ready sample and florisil silica mixture, note not mixing, independent of each other two-layer to form.Pipette and mark working solution in 60mL n-hexane and the 1mL in round-bottomed flask 6, apparatus,Soxhlet's 2 is installed, guarantee each junction good seal, open the electric jacket heating.Notice that solvent is not by evaporate to dryness in the maintenance round-bottomed flask 6.
After the n-hexane boiling, the vapor communication pipe rises, and enters condenser pipe 1 and is condensed in the round-bottomed flask 6, and residual titration is to extracting in the pond 2.Because law of connected vessels, extract that liquid and U-shaped return duct 5 liquid can remain on the horizontal plane in the pond 2, when condensate liquid continued to drop to abstraction pool, the solvent that just has after the corresponding extraction was back in the round-bottomed flask 6 by U-shaped return duct 5 pipes.By this stable circulation distillation, return-flow system, guarantee sample always by solvent soaking, the dry state of solvent can not appear.Thereby realize the extraction to sample.
Claims (4)
1. an auto back flow pattern extraction element connects reflux condensing tube (1) on the described device, and the lower end connects the flask (6) that fills solvent; It is characterized in that: between reflux condensing tube (1) and flask (6), be connected with one and extract pond (2), extract pond (2) interior lower end and be provided with glass filter disc (3), extract one of pond (2) connection and prevent the communicating pipe (4) of siphon and the U-shaped return duct (5) that can keep liquid level.
2. auto back flow pattern extraction element according to claim 1 is characterized in that: described extraction pond (2) is long cartridge type.
3. auto back flow pattern extraction element according to claim 1 is characterized in that: described U-shaped return duct (5) and the connector that extracts pond (2) are in glass filter disc (3) below.
4. auto back flow pattern extraction element according to claim 1, it is characterized in that: described flask is round-bottomed flask (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220042926 CN202762128U (en) | 2012-02-10 | 2012-02-10 | Automatic reflux-type extracting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220042926 CN202762128U (en) | 2012-02-10 | 2012-02-10 | Automatic reflux-type extracting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202762128U true CN202762128U (en) | 2013-03-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220042926 Expired - Lifetime CN202762128U (en) | 2012-02-10 | 2012-02-10 | Automatic reflux-type extracting device |
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| CN (1) | CN202762128U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104784966A (en) * | 2015-04-27 | 2015-07-22 | 沈阳师范大学 | Semi-automatic nicotine extraction device and extraction method |
| CN107913528A (en) * | 2017-10-30 | 2018-04-17 | 云南省农业科学院农业环境资源研究所 | A kind of tannin automatic extractor |
| CN112924265A (en) * | 2021-01-28 | 2021-06-08 | 江西抚州新兴化工有限公司 | Pesticide extraction element is used in pesticide residue detection |
-
2012
- 2012-02-10 CN CN 201220042926 patent/CN202762128U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104784966A (en) * | 2015-04-27 | 2015-07-22 | 沈阳师范大学 | Semi-automatic nicotine extraction device and extraction method |
| CN107913528A (en) * | 2017-10-30 | 2018-04-17 | 云南省农业科学院农业环境资源研究所 | A kind of tannin automatic extractor |
| CN112924265A (en) * | 2021-01-28 | 2021-06-08 | 江西抚州新兴化工有限公司 | Pesticide extraction element is used in pesticide residue detection |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130306 |
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| CX01 | Expiry of patent term |