CN207575847U - A kind of head space micro-extraction device - Google Patents
A kind of head space micro-extraction device Download PDFInfo
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- CN207575847U CN207575847U CN201721247045.4U CN201721247045U CN207575847U CN 207575847 U CN207575847 U CN 207575847U CN 201721247045 U CN201721247045 U CN 201721247045U CN 207575847 U CN207575847 U CN 207575847U
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- head space
- needle
- bottle
- extraction device
- goblet
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Abstract
The utility model discloses a kind of head space micro-extraction device, including ml headspace bottle, microextraction needle and electric heating cover, it is characterised in that：The ml headspace bottle is screw socket ml headspace bottle, and head cover is equipped with hassock piece, and hassock piece center is equipped with the ferrule fitting with aperture；The microextraction needle cylindrical unit is fixed on ferrule fitting, and needle head body is set in sample injection bottle body；The electric heating cover is goblet, and ml headspace bottle bottle is set in goblet；The electric heating cover is equipped with insulated thermal insulating layer equipped with measurement and control of temperature module, goblet outer wall.The utility model uses the design of the traditional head space bottle cap shim liner of hassock piece replacement equipped with cutting ferrule interface, extraction droplet is remained on the vertical line of ml headspace bottle center, and the utility model, using flexible silicone rubber electric heating cover, compact structure, assembling is easy, use scope is wide.
Description
Technical field
The utility model is related to a kind of head space micro-extraction device, more particularly to a kind of stability is good, needle point is away from object sample height
Adjustable, the convenient head space micro-extraction device of heating, belongs to section's grinding device class field.
Background technology
Head space micro-extraction as a kind of novel Sample Pretreatment Technique, have extraction equipment it is simple, it is easy to operate it is quick,
The advantage that consumption of organic solvent is few, bioaccumulation efficiency is high, environmental-friendly, develop in recent years it is very fast, be widely used to food,
In the analysis detection of the samples such as drug, environment and biology.Head space list drop micro-extraction is that organic solvent drop is hung on sample is molten
The top extraction volatility of liquid and the compound of half volatile.For the more complicated sample of some matrix, sample can be eliminated
The interference of matrix effect reduces the requirement to further purifying.
In the head space micro-extraction device reported at present, it is micro- that patent CN200410101811.7 provides a kind of hanging drop type liquid-liquid
Extracting process, sample requirements are few, bioaccumulation efficiency is high, but sample introduction needle needle head body can only be passed through the thin of ml headspace bottle head cover by the device
Gasket is inserted into ml headspace bottle, and muff folder is cased with outside the extraction flask of the invention, is passed through in set folder by thermostatic water-circulator bath
The gas or liquid of the constant temperature of offer keeps the constant of extraction flask temperature；Patent CN200810072068.5 devise from
The device of sub- liquid multiple-dropping liquid-phase microextraction, the needle point of microextraction needle pass through the shim liner of seal bottle cap, and needle point connection carries
The porous extracting head of machine filter film, temperature regulating device use temperature control magnetic stirring apparatus, can only heat ml headspace bottle bottom device.
Above-mentioned micro-extraction device takes sample introduction needle point to be fixed on the method for the closed shim liner of head cover, and sample introduction needle center of gravity is not
Surely, needle point is easily swung, and is not only extracted droplet and is easily fallen, also affects the air-tightness of ml headspace bottle, and be difficult to accurately adjust
The distance of droplet and liquid level is extracted, extraction results precision is caused to be deteriorated；In addition, the mode of heating of traditional head space micro-extraction device is equal
Water-bath, magnetic agitation heating etc. are taken, device volume is big, sample uneven heating is even, the thermal efficiency is low, and is difficult to reach certain higher
Volatilization temperature needed for boiling organics.
Utility model content
The extraction droplet stability that is directed to existing head space micro-extraction device is poor, easy drippage, heating unit volume it is big plus
The deficiencies of required temperature that heat is uneven, the higher organic matter that is difficult to meet boiling point volatilizees, the utility model, which uses, is equipped with card
The hassock piece of socket replaces the shim liner of traditional head space bottle cap and silicon special rubber-heating set substitution traditional heating side
Formula, its object is to：It is good, accurately adjustable away from liquid level to provide a kind of extraction droplet stability, and compact, heating rate
Soon, the head space list of the volatile organic matter higher available for processing boiling point drips micro-extraction device.
To achieve the above object, the technical solution adopted in the utility model is：A kind of head space micro-extraction device, including head space
Bottle, microextraction needle and electric heating cover, it is characterised in that：The ml headspace bottle is screw socket ml headspace bottle, and head cover is equipped with hassock piece, thick
Gasket center is equipped with the ferrule fitting with aperture；The microextraction needle cylindrical unit is fixed on ferrule fitting, and needle head body is set on sample introduction
In bottle；The electric heating cover is goblet, and ml headspace bottle bottle is set in goblet；The electric heating cover is surveyed equipped with temperature
Module is controlled, goblet outer wall is equipped with insulated thermal insulating layer.
As preferred technical solution, a kind of head space micro-extraction device, it is characterised in that：The screw socket head space
Bottle volume is 10-50 mL, and circular hole is equipped among ml headspace bottle head cover, and Circularhole diameter is less than 2 mm of head cover internal diameter, and circular hole position is equipped with
Hassock piece.
As preferred technical solution, a kind of head space micro-extraction device, it is characterised in that：The hassock piece is
Tetrafluoroethene material, diameter is consistent with head cover Circularhole diameter, and thickness is 4-6 mm, and hassock piece center is equipped with inner bolt hole.
As preferred technical solution, a kind of head space micro-extraction device, it is characterised in that：It is described with aperture
Ferrule fitting is set to hassock piece center, and ferrule fitting internal orifice dimension is consistent with microextraction needle cylindrical unit outer diameter.
As preferred technical solution, a kind of head space micro-extraction device, it is characterised in that：The ferrule fitting
Include cutting ferrule, fittings body and nut three parts；The cutting ferrule is the hollow short tube body of polytetrafluoroethylene material, inside sets sealing ring,
Wall thickness 1 mm, height 4-6 mm；The fittings body height is consistent with hassock piece, and is equipped with what is be coupled with hassock piece center inner bolt hole
External screw thread；The nut can realize the fixation and lifting of microextraction needle by adjusting elasticity compresses seal.
As preferred technical solution, a kind of head space micro-extraction device, it is characterised in that：The microextraction
Needle is chromatogram sampling needle, volume 10-50 μ L, during installation, microextraction needle, ferrule fitting, ml headspace bottle center line with always
On line, and microextraction needle needle point is away from liquid level 0.5-1 cm.
As preferred technical solution, a kind of head space micro-extraction device, it is characterised in that：The heating mantle is
The goblet that the silicon rubber heating plate of low profile flexible is rolled into, goblet internal diameter are slightly larger than ml headspace bottle diameter, are highly body height
3/4.
As preferred technical solution, a kind of head space micro-extraction device, it is characterised in that：The measurement and control of temperature
Module includes temperature sensor and temperature control circuit and intelligent digital temperature control, and temperature adjusting control work(is assisted by temperature controller
Can, 20-150 DEG C of temperature control range, temperature measurement accuracy ± 1 DEG C.
As preferred technical solution, a kind of head space micro-extraction device, it is characterised in that：The insulated heat
Layer is gel heat-insulation pad, is covered in heating mantle outer wall.
The beneficial effects of the utility model：
The utility model uses the hassock piece equipped with cutting ferrule interface to replace the design of traditional head space bottle cap shim liner, extracts
Needle stability is good, is not easy to swing, and extraction droplet is made to remain on the vertical line of ml headspace bottle center, and droplet can away from liquid level
Accurate to adjust, the accuracy of data is good.
The utility model uses flexible silicone rubber electric heating cover, can more preferably be attached at heating object, homogeneous heating, heat transfer
It is efficient, heating rate is fast, and compact structure, assembling easily, use scope it is wide.
Description of the drawings
It is required in being described below to embodiment in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is described further, wherein：
Fig. 1 is a kind of structure diagram of head space micro-extraction device；
Fig. 2 is a kind of half sectional view of ferrule fitting in head space micro-extraction device；
1 ml headspace bottle in figure, 2 bottle caps, 3 hassock pieces, 4 ferrule fittings, 4-1 ferrule fittings nut, 4-2 ferrule fittings card
Set, the fittings body of 4-3 ferrule fittings, 4-4 ferrule fittings internal orifice dimension, 5 microextraction needles, 6 goblet electric heating covers, 7 gels are exhausted
Edge heat-barrier material, 8 measurement and control of temperature modules.
Specific embodiment
The utility model is explained further and illustrated with reference to embodiment, but does not form any limit to the utility model
System.
Fig. 1 is a kind of schematic diagram of head space micro-extraction device provided by the utility model, including ml headspace bottle, microextraction needle
With electric heating cover three parts.The utility model replaces the shim liner of traditional head space bottle cap with the hassock piece equipped with cutting ferrule interface, uses
Silicon special rubber-heating set replaces traditional heating water bath mode.
The specific implementation step of the utility model is as follows：
Silicon rubber heating plate is rolled into the goblet heating mantle slightly larger than experiment ml headspace bottle, it is exhausted that goblet outer wall is wrapped with gel
Edge thermal insulation layer adjusts the measurement and control of temperature module of electric heating cover, sets suitable extraction temperature；
Sample is added in ml headspace bottle 1, tightens the bottle cap for being equipped with hassock piece, and the inner bolt hole and ferrule fitting of hassock piece
External screw thread tighten；
Suitable extractant is drawn with the microextraction needle of appropriate volume, sample introduction needle needle cylindrical unit is worn from ferrule fitting internal orifice dimension
Go out, adjustment needle head body screws the nut of ferrule fitting upper end, fix microextraction needle away from liquid level proper height；
Ml headspace bottle is set in the goblet for having reached set temperature, microextraction needle push rod is slowly depressed, works as extraction
It takes and mutually starts timing when microextraction needle needle point hangs suitable volumes, after a certain period of time, gently pull-up extraction needle pushes away for extraction
Bar makes the extractant for being suspended on needle point be sucked back into completely in microextraction needle, is analyzed detect with gas-chromatography instrument later.
Embodiment 1：
The utility model specifically includes following steps to measure in waste water for benzene homologues：As shown in Figure 1, by silicon rubber
Heating plate is rolled into the goblet heating mantle 6 slightly larger than 20 mL ml headspace bottles, and goblet outer wall is wrapped with the gel insulated heat of 8 mm of thickness
Layer 7, adjusts the measurement and control of temperature module 8 of electric heating cover, and set temperature is 30 DEG C；5 mL are added in 20 mL ml headspace bottles 1 containing benzene
It is the waste water and 1 g solid sodium chlorides of object, tightens bottle cap 2 and shake up, bottle cap is equipped with the gasket 3 of 5 mm thickness, and hassock piece
The external screw thread 4-3 of inner bolt hole and ferrule fitting 4 is tightened；The ionic liquid of 10 μ L, sample introduction needle are drawn with 50 μ L microextractions needles 5
Needle cylindrical unit is pierced by from ferrule fitting internal orifice dimension 4-4, is adjusted to needle head body away from 1 cm of liquid level, is screwed the nut 4- of ferrule fitting upper end
1, fix microextraction needle；Ml headspace bottle is set in the goblet for having reached set temperature, slowly depresses microextraction
Needle push rod starts timing when extraction phase ionic liquid is in microextraction needle needle point 2 μ L volumes of suspension, after extracting 15 min, delays
Slow ground pull-up extraction needle push rod, makes the ionic liquid for being suspended on needle point be sucked back into completely in microextraction needle, later with 20 μ L just
Hexane is stripped, its content is measured through gas chromatographicanalyzer device.
The above, only one of specific embodiment of the present utility model, but the scope of protection of the utility model is not
Limitation is here, any variations and alternatives expected without creative work, should all cover in the scope of protection of the utility model
It is interior.Therefore the scope of protection of the utility model should be determined by the scope of protection defined in the claims.
Claims (9)
1. a kind of head space micro-extraction device, including ml headspace bottle, microextraction needle and electric heating cover, it is characterised in that：The head space
Bottle is screw socket ml headspace bottle, and head cover is equipped with hassock piece, and hassock piece center is equipped with the ferrule fitting with aperture；The microextraction needle
Cylinder is fixed on ferrule fitting, and needle head body is set in sample injection bottle body；The electric heating cover is goblet, and ml headspace bottle bottle is set to
In goblet；The electric heating cover is equipped with insulated thermal insulating layer equipped with measurement and control of temperature module, goblet outer wall.
2. a kind of head space micro-extraction device according to claim 1, it is characterised in that：The screw socket ml headspace bottle volume is
10-50 mL, ml headspace bottle head cover centre are equipped with circular hole, and Circularhole diameter is less than 2 mm of head cover internal diameter, and circular hole position is equipped with hassock piece.
3. a kind of head space micro-extraction device according to claim 1, it is characterised in that：The hassock piece is tetrafluoroethene
Material, diameter is consistent with head cover Circularhole diameter, and thickness is 4-6 mm, and hassock piece center is equipped with inner bolt hole.
4. a kind of head space micro-extraction device according to claim 1, it is characterised in that：The ferrule fitting with aperture
Hassock piece center is set to, ferrule fitting internal orifice dimension is consistent with microextraction needle cylindrical unit outer diameter.
5. a kind of head space micro-extraction device according to claim 1, it is characterised in that：The ferrule fitting includes card
Set, fittings body and nut three parts；The cutting ferrule is the hollow short tube body of polytetrafluoroethylene material, inside sets sealing ring, 1 mm of wall thickness,
Height 4-6 mm；The fittings body height is consistent with hassock piece, and equipped with the external screw thread being coupled with hassock piece center inner bolt hole；Institute
The fixation and lifting of microextraction needle can be realized by adjusting elasticity compresses seal by stating nut.
6. a kind of head space micro-extraction device according to claim 1, it is characterised in that：The microextraction needle is chromatography
Sample introduction needle, volume 10-50 μ L, during installation, microextraction needle, ferrule fitting, ml headspace bottle center line on the same line, and
Microextraction needle needle point is away from liquid level 0.5-1 cm.
7. a kind of head space micro-extraction device according to claim 1, it is characterised in that：The electric heating cover is slim soft
Property the goblet that is rolled into of silicon rubber heating plate, goblet internal diameter is slightly larger than ml headspace bottle diameter, highly 3/4 for body height.
8. a kind of head space micro-extraction device according to claim 1, it is characterised in that：The measurement and control of temperature module includes
Temperature sensor and temperature control circuit and intelligent digital temperature control assist temperature adjusting control function, temperature control model by temperature controller
20-150 DEG C is enclosed, temperature measurement accuracy ± 1 DEG C.
9. a kind of head space micro-extraction device according to claim 1, it is characterised in that：The insulated thermal insulating layer is gel
Heat insulating mattress is covered in heating mantle outer wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721247045.4U CN207575847U (en) | 2017-09-27 | 2017-09-27 | A kind of head space micro-extraction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721247045.4U CN207575847U (en) | 2017-09-27 | 2017-09-27 | A kind of head space micro-extraction device |
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| Publication Number | Publication Date |
|---|---|
| CN207575847U true CN207575847U (en) | 2018-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721247045.4U Expired - Fee Related CN207575847U (en) | 2017-09-27 | 2017-09-27 | A kind of head space micro-extraction device |
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| CN (1) | CN207575847U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111257399A (en) * | 2018-11-30 | 2020-06-09 | 中国科学院大连化学物理研究所 | Direct mass spectrum detection device for high-throughput measurement of volatile organic compounds in blood |
| CN115856178A (en) * | 2023-02-24 | 2023-03-28 | 成都科林分析技术有限公司 | Headspace solid phase microextraction sample injection device and method |
-
2017
- 2017-09-27 CN CN201721247045.4U patent/CN207575847U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111257399A (en) * | 2018-11-30 | 2020-06-09 | 中国科学院大连化学物理研究所 | Direct mass spectrum detection device for high-throughput measurement of volatile organic compounds in blood |
| CN115856178A (en) * | 2023-02-24 | 2023-03-28 | 成都科林分析技术有限公司 | Headspace solid phase microextraction sample injection device and method |
| CN115856178B (en) * | 2023-02-24 | 2023-05-23 | 成都科林分析技术有限公司 | Headspace solid-phase microextraction sampling device and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180706 Termination date: 20190927 |
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| CF01 | Termination of patent right due to non-payment of annual fee |