CN103949087A - Dispersive liquid-liquid microextraction device and method - Google Patents
Dispersive liquid-liquid microextraction device and method Download PDFInfo
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- CN103949087A CN103949087A CN201410202728.2A CN201410202728A CN103949087A CN 103949087 A CN103949087 A CN 103949087A CN 201410202728 A CN201410202728 A CN 201410202728A CN 103949087 A CN103949087 A CN 103949087A
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- liquid
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- dispersion liquid
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- seal cover
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Abstract
The invention discloses a dispersive liquid-liquid microextraction device and method, used for dispersive liquid-liquid microextraction. The dispersive liquid-liquid microextraction device comprises a container (1); two ends of the container (1) are provided with end openings (2); the end openings (2) are respectively connected with seal covers (3). The invention designs a special device for dispersive liquid-liquid microextraction; two ends of the container are both provided with the end openings; each end opening is equipped with a flexible sealing cover through which a needles can penetrate, cannot block the needle and cannot leak liquid, so that a needle tube can penetrate through the sealing covers nearby to extract precipitate according to the position of precipitate in the container; the water extraction probability can be reduced greatly compared with that of the existing separation mode, and the service life of a gas chromatography instrument can be prolonged; the test data accuracy can be ensured, and the end openings are machined into long and thin tubes, and are provided with scales, so that the quantity of extracts can be seen clearly.
Description
Technical field
Patent of the present invention relates to a kind of dispersion liquid-liquid micro-extraction device and method thereof, belongs to use for laboratory equipment and experimental working technique technical field.
Background technology
Dispersive liquid-liquid microextraction (dispersive liquid-liquid microextraction, DLLME) is by propositions first in 2006 such as Rezaee.This technology adds dispersant and extractant in sample solution, and mixed liquor forms emulsion system layering after centrifugal of water-dispersant-extractant after light shaking, direct injection analysis after extractant is taken out.The method will be sampled, extract and concentrate in one, simple to operate, cost is low, bioaccumulation efficiency is high, required consumption of organic solvent is few, easily and gas-chromatography, the advantages such as liquid chromatograph coupling, it is a kind of eco-friendly liquid-phase micro-extraction new technology, in trace analysis field, be used widely, because the density of the extractant that uses in conventional dispersion liquid-liquid current micro-extraction system need be larger than water, therefore extractant (containing object) is generally all in centrifuge tube bottom, when injection needle sees through upper water solution extracting objects thing, operation is improper a little will inspiration part moisture, the one, can cause damage to gas-chromatography instrument, the 2nd, cause the unstable of test data, cannot prepare quantitatively, its extraction process is shown in Fig. 1.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of dispersion liquid-liquid micro-extraction device and method thereof that can accurately extract extractant is provided, and can overcome the deficiencies in the prior art.
Technical scheme of the present invention is: dispersion liquid-liquid micro-extraction device, it comprises container, at the two ends of container, is provided with port, is connected with respectively seal cover on port.
Described seal cover is the flexible sealing lid that syringe needle could pass and can not stop up syringe needle and leakage.
The port of the one or both ends of described container is elongated tubular product, and the diameter of its elongated tubular product is the 1/5-1/15 of container average diameter.
Design flow scale on the elongated tubular of port.
Utilize said apparatus to carry out the method for dispersion liquid-liquid micro-extraction, the method is first sample solution added to both ends open and be provided with in the container of seal cover, then in the container of vertical placement, add the dispersant that contains extractant, until its emulsification, after centrifugal, form precipitation, last according to sediment the position correspondence in container utilize needle tubing through seal cover, sediment to be extracted nearby.
Compared with the prior art, the present invention has designed a kind of special purpose device of dispersion liquid-liquid micro-extraction, it is all to offer port at the two ends of container, on port, is all furnished with the flexible sealing lid that syringe needle could pass and can not stop up syringe needle and leakage, so in the end according to sediment, the position correspondence in container utilizes needle tubing through seal cover, sediment to be extracted nearby, so relatively existing separate mode can significantly reduce the probability that extracts moisture content, can increase the service life of gas-chromatography instrument; The accuracy of guaranteeing test data, is processed into elongated tubular product by port, and is provided with scale, the quantity of finding out extract that can be comparatively clear and definite.
Accompanying drawing explanation
Fig. 1 is existing dispersion liquid-liquid micro-extraction process drawing;
Fig. 2 is structural representation of the present invention;
Fig. 3 utilizes the present invention to complete the procedure chart of dispersion liquid-liquid micro-extraction technique.
The specific embodiment
Embodiment 1, be illustrated in figure 2 the structural representation of dispersion liquid-liquid micro-extraction device, the container 1 of both ends open is made by glass or plastics, the one or both ends of its port 2 are processed into elongated tubular product, the diameter of its elongated tubular product is the 1/5-1/15 of container average diameter, while design flow scale on the elongated tubular of port 2, it in figure, is one end, for realizing the sealing of container, two ends at container 1 are provided with port, on port 2, be connected with respectively seal cover 3, because seal cover will complete the work of fluid injection or drawing liquid, its material of making seal cover 3 need meet the flexible sealing lid that syringe needle could pass and can not stop up syringe needle and leakage.
As shown in Figure 3, the method of utilizing this device to carry out dispersion liquid-liquid micro-extraction is first sample solution added to both ends open and be provided with in the container of seal cover, then in the container of vertical placement, add the dispersant that contains extractant, until its emulsification, after centrifugal, form precipitation, last according to sediment the position correspondence in container utilize needle tubing through seal cover, sediment to be extracted nearby.
Claims (5)
1. dispersion liquid-liquid micro-extraction device, it is for dispersion liquid-liquid micro-extraction, and it comprises container (1), it is characterized in that; At the two ends of container (1), be provided with port (2), on port (2), be connected with respectively seal cover (3).
2. dispersion liquid-liquid micro-extraction device according to claim 1, is characterized in that: described seal cover (3) is the flexible sealing lid that syringe needle could pass and can not stop up syringe needle and leakage.
3. according to dispersion liquid-liquid micro-extraction device claimed in claim 2, it is characterized in that: the one or both ends of described container (1) port (2) are elongated tubular product, the diameter of its elongated tubular product is the 1/5-1/15 of container average diameter.
4. dispersion liquid-liquid micro-extraction device according to claim 3, is characterized in that: design flow scale on the elongated tubular of port (2).
5. utilize dispersion liquid-liquid micro-extracting method of device described in claim 4, it is characterized in that: the method is first sample solution added to both ends open and be provided with in the container of seal cover, then in the container of vertical placement, add the dispersant that contains extractant, until its emulsification, after centrifugal, form precipitation, last according to sediment the position correspondence in container utilize needle tubing through seal cover, sediment to be extracted nearby.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410202728.2A CN103949087A (en) | 2014-05-14 | 2014-05-14 | Dispersive liquid-liquid microextraction device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410202728.2A CN103949087A (en) | 2014-05-14 | 2014-05-14 | Dispersive liquid-liquid microextraction device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103949087A true CN103949087A (en) | 2014-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410202728.2A Pending CN103949087A (en) | 2014-05-14 | 2014-05-14 | Dispersive liquid-liquid microextraction device and method |
Country Status (1)
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| CN (1) | CN103949087A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113018904A (en) * | 2021-03-16 | 2021-06-25 | 中国科学院地理科学与资源研究所 | Dispersion liquid-liquid micro-extraction device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3081029A (en) * | 1959-06-19 | 1963-03-12 | Copolymer Rubber & Chem Corp | Improved centrifuge tube |
| US3800956A (en) * | 1970-07-10 | 1974-04-02 | H Nishizawa | Vessel for chemical action |
| CN203874505U (en) * | 2014-05-14 | 2014-10-15 | 贵州省烟草科学研究院 | Dispersion liquid-liquid micro-extraction device |
-
2014
- 2014-05-14 CN CN201410202728.2A patent/CN103949087A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3081029A (en) * | 1959-06-19 | 1963-03-12 | Copolymer Rubber & Chem Corp | Improved centrifuge tube |
| US3800956A (en) * | 1970-07-10 | 1974-04-02 | H Nishizawa | Vessel for chemical action |
| CN203874505U (en) * | 2014-05-14 | 2014-10-15 | 贵州省烟草科学研究院 | Dispersion liquid-liquid micro-extraction device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113018904A (en) * | 2021-03-16 | 2021-06-25 | 中国科学院地理科学与资源研究所 | Dispersion liquid-liquid micro-extraction device and method |
| CN113018904B (en) * | 2021-03-16 | 2022-03-01 | 中国科学院地理科学与资源研究所 | Dispersion liquid-liquid micro-extraction device and method |
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Application publication date: 20140730 |