CN211652718U - Full-automatic turret type solid phase micro-extraction device - Google Patents
Full-automatic turret type solid phase micro-extraction device Download PDFInfo
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- CN211652718U CN211652718U CN202020093812.6U CN202020093812U CN211652718U CN 211652718 U CN211652718 U CN 211652718U CN 202020093812 U CN202020093812 U CN 202020093812U CN 211652718 U CN211652718 U CN 211652718U
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Abstract
The utility model discloses a full-automatic turret type solid phase micro-extraction device, including turret type automatic sample injector body and sample advance appearance dish, turret type automatic sample injector body includes capstan head and capstan head base, and one side that capstan head base and sample advance the adjacent one side of appearance dish is provided with on the display screen capstan head base and sample advance appearance dish relative one side be provided with be used for with the micro-extraction appearance module of chromatogram class instrument introduction port intercommunication, the opposite side that corresponds with the display screen on the capstan head base is provided with ageing device. The utility model discloses set up the interface of sampling system such as chromatograph on the fixed station of current solid phase microextraction appearance to through the automatic control of capstan head, realized that solid phase microextraction syringe needle inserts instrument sampling port system such as chromatogram voluntarily, secondly newly increase a station on the capstan head rotation path of existing equipment, increased ageing device on this station, make current equipment after the single extraction, the station that the automatic rotation arrives ageing device place is ageing and nitrogen gas sweeps.
Description
Technical Field
The utility model relates to a liquid sample injector technical field especially relates to a full-automatic turret type solid phase micro-extraction device.
Background
At present, a solid-phase microextraction (SPME) technology is one of common technologies for sample pretreatment in a laboratory, overcomes the defects of the traditional sample pretreatment technology, integrates sampling, extraction, concentration and sample introduction into a whole, and greatly accelerates the speed of analysis and detection. The solid phase micro-extraction technology can be almost used for analyzing various volatile or semi-volatile substances in samples such as gas, liquid, biology, solid and the like, is developed for 10 years, and has been widely applied to various aspects in the fields of environment, biology, industry, food, clinical medicine and the like.
At present, the micro-extraction device in the domestic laboratory is completely manual, specifically, the existing solid phase micro-extraction device is similar to a micro-sampler of gas chromatography, the extraction head is formed by coating a solid phase micro-extraction coating on a quartz fiber, a thin stainless steel tube is sleeved outside the quartz fiber to protect the quartz fiber from being broken, and the fiber head can stretch and contract in the steel tube. Manually immersing the fiber head into the sample solution or the headspace gas for a period of time, simultaneously stirring the solution to accelerate the two phases to reach a balanced speed, manually taking out the fiber head after balancing, inserting the fiber head into a gas chromatography vaporization chamber, thermally desorbing the substances adsorbed on the coating, desorbing the extract in the vaporization chamber, and introducing the extract into a chromatographic column by virtue of a mobile phase to finish the whole processes of extraction, separation and concentration. In the existing equipment, a micro-extraction needle is inserted into a headspace part of a detection sample bottle with a constant temperature by an inspector, and after waiting for a certain time, the micro-extraction needle is manually inserted into a sample introduction system of a chromatographic instrument which is debugged. The detection mode has high personnel requirement, low efficiency and large detection error, and is not suitable for a modern detection laboratory with large sample quantity, high detection precision requirement, low personnel operation level and short detection time requirement.
In addition, in actual use, although the extraction needle is desorbed in the vaporization chamber after extraction, the extraction needle still has residual extract, and the residual extract greatly affects the next extraction, thereby affecting the overall detection accuracy. If the instrument does not have a special high-temperature aging device for the solid phase micro-extraction head, the aging function of the instrument uses the sample inlets of a chromatograph and a mass spectrometer as aging ports, but when some instruments only have one sample inlet, the aging temperature of the instrument cannot be set as required, the aging effect of the solid phase micro-extraction needle is poor, and therefore the detection precision is reduced, and the detection error is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a full-automatic turret type solid phase micro-extraction device can carry out solid phase micro-extraction in full-automatic, and has improved because the remaining defect that influences the accuracy of experiment of extraction head extract.
The utility model adopts the technical proposal that:
the utility model provides a full-automatic turret type solid phase micro-extraction device, includes turret type auto-sampler body and sample advance the sample dish, the sample advance the sample dish can dismantle the setting in one side of turret type auto-sampler body, turret type auto-sampler body includes capstan head and turret base, the side of turret base and the adjacent one side of sample advance sample dish is provided with the display screen, it is provided with a plurality of adjustment button to correspond on the base on the display screen, be provided with on the turret and be used for the solid phase micro-extraction appearance module with chromatogram class instrument introduction port intercommunication, the opposite side that corresponds with the display screen on the turret base is provided with ageing device, ageing device fixed set up on the ageing station of turret type auto-sampler body base for the syringe needle of turret type auto-sampler is aged as required.
The aging device comprises an aging core rod provided with an aging cavity, a nitrogen source, an air resistor and a heating block, wherein the top of the aging core rod is a sample inlet of the aging cavity, a sealing gasket is arranged in the sample inlet, an air inlet hole is arranged on one side of the aging cavity below the sealing gasket and communicated with an air outlet of the nitrogen source through an air inlet pipe, the bottom of the aging cavity is provided with an air outlet, the air outlet is communicated with one end of an exhaust pipe, and the other end of the exhaust pipe is hermetically provided with a multifunctional filter and the air resistor; the heating block comprises a heating pipe, a temperature probe and a heat conducting block, the heat conducting block is of a cylinder structure with an upper through hole and a lower through hole in the middle in the vertical direction, the heating pipe is embedded in the heat conducting block, the middle part of the aging cavity of the aging core rod penetrates through the through hole of the heat conducting block, and the heating block is sleeved with the aging cavity of the aging core rod.
The air inlet pipe is provided with an electromagnetic valve for controlling the opening and closing of an air path of the air inlet pipe.
And the exhaust pipe is provided with an air filter for filtering the aged gas and then exhausting the gas into the atmosphere.
The temperature probe is embedded on the heat conducting block and used for monitoring the temperature of the heating block in real time, and the temperature of the heating block can be adjusted quickly.
The aging plug cover is characterized by further comprising an aging cover, wherein a through hole is formed in the middle of the aging cover, and the aging cover is in threaded connection with the top of the aging plug.
Still be provided with the introduction port briquetting, the introduction port briquetting be the cylinder boss, be provided with the guide through-hole in the middle of the cylinder boss, the ground diameter of cylinder boss is the same with the import of ageing plug, the top diameter of cylinder boss is not more than the diameter of ageing flap through-hole.
The guide through hole is a conical inlet.
The solid phase micro-extraction sample injection module comprises a handle module, a probe module and a needle mounting module; the handle module including handle push rod, handle sleeve pipe, handle fixed head and M2 stop screw, handle sleeve pipe 62 one side be provided with rectangular hole, stop screw sets up perpendicularly in one side of handle push rod, and slides and set up in rectangular downthehole.
The needle mounting module is a detachable needle mounting module with a heating function.
The utility model discloses set up the interface of sampling system such as chromatograph on the fixed station of current solid phase microextraction appearance, thereby through the automatic control of capstan head, realized that solid phase microextraction syringe needle inserts instrument sampling port systems such as chromatogram automatically, secondly add a station on the capstan head rotation route of current equipment newly, ageing device has been increased on this station, make current equipment can be in the working procedure setting, can after single extraction, the station that automatic rotation to ageing device place ages, make solid phase microextraction appearance have solid phase microextraction head automatic ageing (purification) and nitrogen gas to sweep the function; the aging (purifying) time and temperature of the solid phase micro-extraction head, the sample extraction time and temperature, the sample injection time and the like can be set according to the requirement by matching the time processing of the processor.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic structural diagram of the aging apparatus of the present invention;
fig. 3 is a schematic structural diagram of the heating block of the present invention;
FIG. 4 is a schematic structural view of the solid phase microextraction sample injection module of the present invention;
fig. 5 is a side view of the solid phase micro-extraction sample module of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.
It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, 2 and 3, the utility model discloses a turret type automatic sample injector body, the sample feeding disc and the aging device 21 that can be dismantled and be provided with on turret type automatic sample injector body one side, turret type automatic sample injector body includes capstan head 22 and turret base 20, the side of turret base 20 and the adjacent one side of sample feeding disc is provided with display screen 24, it is provided with a plurality of adjustment buttons 25 to put on the base correspondingly on display screen 24, turret base 20 and the relative one side of sample feeding disc are provided with the introduction port (visual angle problem, not shown in the figure) that is used for with the import intercommunication of chromatogram class instrument, be provided with the solid phase microextraction introduction module that is used for with the introduction port of chromatogram class instrument on turret 22; the other side that corresponds with display screen 24 place one side on the capstan head base is provided with ageing device 21, ageing device 21 fixed set up on the ageing station of turret type autosampler body base 20 for the sampling needle of turret type autosampler ages as required.
The turret 22 is provided with a mounting plate, an injection assembly, a rotation assembly and a needle mounting module, the detailed structure of which is not described herein in detail in the prior art, namely, the sample injection needle can be rapidly changed by the module, the constant temperature requirement of the extraction needle can be realized by arranging the heating module in the needle mounting module, and then the turret structure is matched, the constant temperature keeping, extraction, sample introduction and aging can be automatically realized, the aging device 21 comprises an aging core rod 10 provided with an aging cavity, a nitrogen source, a gas resistor 5 and a heating block 3, the top of the aging core rod 10 is a sample inlet of an aging cavity, a sealing gasket 8 is arranged in the sample inlet, an air inlet hole is arranged on one side of the aging cavity below the sealing gasket 8 and is communicated with an air outlet of a nitrogen source through an air inlet pipe 4, an air outlet is arranged at the bottom of the aging cavity and is communicated with one end of an exhaust pipe 7, and an air resistor 5 is arranged at the other end of the exhaust pipe 7 in a sealing manner; the heating block 3 comprises a heating pipe 12 and a heat conducting block 14, the heat conducting block 14 is of a cylinder structure with an upper through hole and a lower through hole in the middle in the vertical direction, the heating pipe 12 is embedded in the heat conducting block 14, and the middle part of the aging cavity of the aging core rod 10 penetrates through the through hole of the heat conducting block and is sleeved outside the heating block 3.
The air inlet pipe 4 is provided with an electromagnetic valve 11 for controlling the opening and closing of the air path of the air inlet pipe 4. The controller matched with the turret mechanism can realize timed aging, and the aging is automatically disconnected after finishing aging.
And the exhaust pipe 7 is provided with an air filter 6 for filtering the aged gas and then exhausting the gas into the atmosphere.
The temperature probe 13 is embedded on the heat conducting block 14 and used for monitoring the temperature of the heating block in real time, and the temperature can be adjusted quickly.
Still including ageing flap 9, be provided with the through-hole in the middle of ageing flap 9, ageing flap 9 and ageing plug 10 top spiro union. Still be provided with sample inlet briquetting 2, sample inlet briquetting 2 be the cylinder boss, be provided with the guide through-hole in the middle of the cylinder boss, the bottom surface diameter of cylinder boss is the same with the import of ageing plug 10, the top diameter of cylinder boss is not more than the diameter of ageing flap 9 through-hole. By arranging the sample inlet pressing block 2, the sample inlet pressing block 2 can be pressed against the sealing gasket 8 when the aging port cover 9 is screwed down during use, high pressure is prevented from being blown out to lose the sealing effect, and then the structure of the guide through hole is arranged to be a conical structure, so that the aging needle can better enter the content part of the aging core rod for aging,
the guide through hole is a conical inlet, so that the aging needle is better guided and protected.
The top of ageing chamber be provided with guide structure in the below of sealed 8 that fills up, guide structure be the guide port, the top and the introduction port intercommunication of funnel type guide port, the bottom communicates with ageing cavity. The anti-aging core rod has good protection effect, and the core rod is prevented from being damaged by the structure of the anti-aging core rod.
The utility model discloses well outside square stainless steel overcoat 1 of adoption, inside heating piece 3, heating pipe 12 and temperature probe 13 for aluminium system, 4 intercommunication air inlet solenoid valves 11 of nitrogen gas intake pipe and the 10 upper portion air inlets of ageing plug, nitrogen gas blast pipe 7 connect under the export of the 10 lower extremes of ageing plug even air resistance 5, install multi-functional air cleaner 6 in the air resistance 5, solid phase micro-extraction head is ageing (purifying) and nitrogen gas sweeps all from last to bottom. In actual use: after the heating block 3, the heating pipe 12, the aging core rod 10 and the temperature probe 13 are heated to a set temperature and are kept at a constant temperature, the turret transfers the solid phase micro-extraction head to the sample inlet pressing block 2, the needle feeding motor works to enable the solid phase micro-extraction needle head to enter the aging core rod 10, the nitrogen purging electromagnetic valve 11 is opened, the high-temperature nitrogen purging aging (purification) of the solid phase micro-extraction needle head is started, and the set time is up. The sealing gasket 8 plays a role in sealing, so that the blown air flow is led to the multifunctional filter 6.
Ageing device's overall structure be square stainless steel overcoat, inside for aluminium system heating module and heating pipe, nitrogen gas sweeps the flow path from the top down, the nitrogen gas export connects the gas resistance and multifunctional filter, the ageing (purification) of solid phase micro-extraction head and nitrogen gas sweep all from the top down. After the heating module and the heating pipe are heated to the set temperature and the constant temperature is Xian, the turret rotates the solid phase micro-extraction head to the insertion guide port, the needle insertion motor works to enable the solid phase micro-extraction head to enter the heating module, the nitrogen purging electromagnetic valve is opened, the high temperature and nitrogen purging aging (purification) of the solid phase micro-extraction head is started, and the set time is up.
Sample advance the appearance dish and include sample dish 23 and base 25, be provided with heating module 26 on the base 25, heating module 26 be used for heating solid phase micro-extraction, the position that specific several bottles that can adopt before the sample station correspond is as heating the position, the position that corresponds heating position on the base up end sets up the heating plate to can heat up it according to the temperature of setting for, the sample advance the shell of appearance dish for round heat-resisting race steel plastics material, the sample bottle is heated constant temperature to setting for the temperature at the heating station, the turret type sampling system inserts the sample bottle top with solid phase micro-extraction head, extracts according to the setting for time. Specifically, a sample tray rotates and positions a motor to rotate a sample bottle to a sample introduction position, a heating and heat-preserving constant temperature tank is started to a set temperature, a stirring rotor motor is started, a turret type sample introduction system inserts a solid phase micro-extraction head into the extraction top of the sample bottle, extraction is finished until a set time, and then a sample introduction step is carried out.
In practical use, the heating station is also provided with a temperature sensor for monitoring the feedback heating temperature at any time, so that the temperature can be kept constant. And simultaneously, the heating station under still install agitator motor, have the stirring cantilever of installing two magnets on the motor output shaft to can stir when heating the sample in the sample bottle on the heating station, make it accord with the requirement of advancing the appearance.
As shown in fig. 4 and 5, in order to realize automatic insertion of the solid phase microextraction head into the sample inlet system of the chromatographic instrument, so as to bring the measured component into the analytical instrument for detection, the solid phase microextraction sample inlet module is convenient to replace, and comprises a handle module, a probe module and a needle mounting module; the handle module comprises a handle push rod 61, a handle sleeve 62, a handle fixing head 67 and an M2 limit screw 63, wherein one side of the handle sleeve 62 is provided with a long strip hole, and the M2 limit screw 63 is vertically arranged on one side of the handle push rod 61 and is slidably arranged in the long strip hole and used for limiting the relative position of the handle push rod 61 and the handle sleeve 62; the probe module comprises a probe needle core (the probe needle core is completely arranged in the probe protective sleeve 68 when the M2 limit screw 63 is arranged at the uppermost end of the elongated hole in the figure, so that the probe needle core is not shown in the figure), a probe protective sleeve 68 and a probe M5 threaded joint 69; the needle mounting module is a detachable needle mounting module with a heating function, and the specific structure and position relation of the needle mounting module is not repeated herein because the needle mounting module is the prior art. The needle mounting module comprises a needle mounting frame 64, a heater, a needle pressing buckle (the needle pressing buckle comprises a pressing block 66, a pressing spring and a pin shaft 65 which are of a conventional structure, the specific position relation of the needle pressing buckle is not traced back, a positioning column 70 and a magnet plate 71), different probe modules can be disassembled and replaced at high speed through the needle mounting module, and the needle mounting module is the prior art, so that the repeated description is omitted. The handle push rod 61 is fixed with the probe needle core, and the front end of the probe needle core is provided with an extraction head containing one or more coatings; the handle fixing head 67 is provided with a small through hole, the probe protecting sleeve 68 penetrates out of the small through hole, and the handle sleeve 62, the probe protecting sleeve 68 and the handle fixing head 67 are fixed together. The handle push rod 61 moves up and down to drive the probe needle core to move, and the extraction head in front of the probe needle core also moves up and down along with the probe needle core. When the extraction head moves to the lowest position, the probe protection sleeve 68 can be completely extended out, and when the extraction head moves to the uppermost position, the probe protection sleeve 68 can be completely received; the probe module of the solid phase microextraction is a replaceable component, and through the structure, the stepping driving of the turret and the setting of the sample inlet of a chromatographic instrument can be realized, so that the whole working process of the solid phase microextraction can be automatically realized without manual operation.
The working principle of the solid phase microextraction sample injection module is as follows: connecting the probe with an M5 internal thread on the handle push rod through an M5 threaded joint 69, installing a handle fixing head 67, and pulling up the handle push rod 61 to an M2 limit screw 63 to reach the top; the handle module of solid phase micro-extraction is arranged in a positioning groove of a needle mounting module, and the handle module is fixed by a needle pressing buckle; and (3) the needle mounting module is mounted at the position of a sample injection needle of the injection mechanism of the instrument, the position of the sample injection needle is limited by the positioning column 70, the magnet plate 71 is tightly matched, and needle mounting is finished. When the instrument extracts, the extraction head is moved to the lowest surface to extend out of the probe protective sleeve 68, sample extraction starts, after extraction is completed according to set time, the extraction head is moved to the uppermost M2 limit screw 63 to reach the topmost part, the extraction head is received in the probe protective sleeve 68 and then is transferred to a sample inlet system of a chromatographic instrument, at the moment, the extraction head is moved to the lowest surface to extend out of the probe protective sleeve, and analysis sample introduction starts.
The utility model discloses a set up ageing device, combine the turret structure to make whole device realize that full-automatic solid phase microextraction is ageing (purifying) and nitrogen gas sweep the function, simultaneously through the setting of heating the sample dish, make the device have full-automatic sample constant temperature heating extraction function, combine to set up instrument introduction ports such as chromatogram in base one side, through the turret structure, thereby realized instrument introduction port system function such as solid phase microextraction syringe needle automatic insertion chromatogram, finally the utility model discloses a have full-automatic solid phase microextraction head extraction function, and to the ageing (purifying) time of solid phase microextraction head, temperature, sample extraction time, temperature, introduction time etc. carry out the free setting function according to actual demand, make the efficiency of solid phase microextraction promote greatly, the precision of experimental data promotes greatly.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a full-automatic turret type solid phase micro-extraction device, includes turret type autosampler body and sample plate of advancing, its characterized in that: the sample advance kind dish can dismantle the one side that sets up at the turret type automatic sample injector body, the turret type automatic sample injector body includes capstan head and turret base, the side of turret base and the adjacent one side of sample advance kind dish is provided with the display screen, it is provided with a plurality of adjustment button to correspond on the base to put on the display screen, be provided with on the turret and be used for the solid phase microextraction appearance sample module with chromatogram class instrument introduction port intercommunication, the opposite side that corresponds with the display screen on the turret base is provided with ageing device, ageing device fixed set up on the ageing station of turret type automatic sample injector body base for the sample needle of turret type automatic sample injector ages as required.
2. The full-automatic turret type solid phase micro-extraction device according to claim 1, wherein: the aging device comprises an aging core rod provided with an aging cavity, a nitrogen source, an air resistor and a heating block, wherein the top of the aging core rod is a sample inlet of the aging cavity, a sealing gasket is arranged in the sample inlet, an air inlet hole is arranged on one side of the aging cavity below the sealing gasket and communicated with an air outlet of the nitrogen source through an air inlet pipe, the bottom of the aging cavity is provided with an air outlet, the air outlet is communicated with one end of an exhaust pipe, and the other end of the exhaust pipe is hermetically provided with a multifunctional filter and the air resistor; the heating block comprises a heating pipe, a temperature probe and a heat conducting block, the heat conducting block is of a cylinder structure with an upper through hole and a lower through hole in the middle in the vertical direction, the heating pipe is embedded in the heat conducting block, the middle part of the aging cavity of the aging core rod penetrates through the through hole of the heat conducting block, and the heating block is sleeved with the aging cavity of the aging core rod.
3. The full-automatic turret type solid phase micro-extraction device according to claim 2, wherein: the air inlet pipe is provided with an electromagnetic valve for controlling the opening and closing of an air path of the air inlet pipe.
4. The full-automatic turret type solid phase micro-extraction device according to claim 2, wherein: and the exhaust pipe is provided with an air filter for filtering the aged gas and then exhausting the gas into the atmosphere.
5. The full-automatic turret type solid phase micro-extraction device according to claim 1, wherein: the temperature probe is embedded on the heat conducting block and used for monitoring the temperature of the heating block in real time, and the temperature of the heating block can be adjusted quickly.
6. The full-automatic turret type solid phase micro-extraction device according to claim 1, wherein: the aging plug cover is characterized by further comprising an aging cover, wherein a through hole is formed in the middle of the aging cover, and the aging cover is in threaded connection with the top of the aging plug.
7. The full-automatic turret type solid phase micro-extraction device according to claim 1, wherein: still be provided with the introduction port briquetting, the introduction port briquetting be the cylinder boss, be provided with the guide through-hole in the middle of the cylinder boss, the ground diameter of cylinder boss is the same with the import of ageing plug, the top diameter of cylinder boss is not more than the diameter of ageing flap through-hole.
8. The full-automatic turret type solid-phase micro-extraction device according to claim 7, wherein: the guide through hole is a conical inlet.
9. The full-automatic turret type solid phase micro-extraction device according to claim 1, wherein: the solid phase micro-extraction sample injection module comprises a handle module, a probe module and a needle mounting module; the handle module comprises a handle push rod, a handle sleeve, a handle fixing head and an M2 limiting screw, wherein a strip hole is formed in one side of the handle sleeve, the limiting screw is vertically arranged on one side of the handle push rod, and the limiting screw is slidably arranged in the strip hole.
10. The full-automatic turret type solid phase micro-extraction device according to claim 9, wherein: the needle mounting module is a detachable needle mounting module with a heating function.
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| CN111122750A (en) * | 2020-01-16 | 2020-05-08 | 河南阿尔法科学仪器有限公司 | Full-automatic turret type solid phase micro-extraction device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111122750A (en) * | 2020-01-16 | 2020-05-08 | 河南阿尔法科学仪器有限公司 | Full-automatic turret type solid phase micro-extraction device |
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