CN101819193B - Multifunctional gas-chromatograph automatic sample injector - Google Patents
Multifunctional gas-chromatograph automatic sample injector Download PDFInfo
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- CN101819193B CN101819193B CN 200910208184 CN200910208184A CN101819193B CN 101819193 B CN101819193 B CN 101819193B CN 200910208184 CN200910208184 CN 200910208184 CN 200910208184 A CN200910208184 A CN 200910208184A CN 101819193 B CN101819193 B CN 101819193B
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Abstract
The invention discloses a multifunctional gas-chromatograph automatic sample injector comprising a rotary tower base, one side of the rotary tower base is provided with a sample disk assembly, a rotary tower is arranged on the rotary tower base, and an injector assembly is arranged on the rotary tower and comprises an injector and a needle core assembled with the injector; the needle core is arranged on a needle core fixing block driven by a vertically arranged synchronous belt and a synchronous belt of the needle core fixing block, the synchronous belt of the needle core fixing block and a sample disk are respectively driven by a stepping motor with a feedback encoder connected with a central processor, and the central processor is also connected with a human-computer interface. The multifunctional gas-chromatograph automatic sample injector has the advantages of convenient installation and use, strong university, 24-hour uninterrupted work when unattended, high sampling volume and repeatability precision, high degree of automation, manpower saving, alleviation of labor intensity of workers, enhancement of working efficiency and improvement on the accuracy of the sample analysis result of a gas chromatograph.
Description
Technical field
The present invention relates to gas chromatograph, the automatic sampling apparatus of special use during especially a kind of gas chromatograph analytic sample.
Background technology
At present, the input mode of domestic gas phase instrument adopts the hand sampling mode mostly, be that the operator quantitatively injects the chromatographic column head with syringe with sample, because operator's skill level is different with custom, add the artificial collimation error, cause sample introduction speed unstable, quantitative error is large, thereby precision of analysis has reduced.
A kind of automatic liquid sample feeder for gas phase chromatograph is disclosed in patent 96222653.x, its structure is: be comprised of injector and controller, injector is by the sample disc assembly, injector assembly, keyboard and motor drive circuit module composition, controller is made of control circuit and keyboard display module, and the plunger in the injector assembly is connected with synchronous pulley with Timing Belt, by its up and down straight-line displacement of stepping motor load.But the automatic liquid sample feeder for gas phase chromatograph nook closing member Automatic Extraction solution of this structure, but corresponding measure behind the step out of stepping motor lacked, automaticity is not high, and precision is relatively poor.
Summary of the invention
It is little, lightweight, easy to install to the purpose of this invention is to provide a kind of volume, highly versatile, unmanned can non-stop run in 24 hours, and the sample size repeatable accuracy is high, automaticity is high, save manpower, alleviate intensity of workers, greatly increase work efficiency, improve the multifunctional gas-chromatograph automatic sample injector of gas chromatograph analytic sample result's accuracy.
For achieving the above object, the present invention adopts following technical scheme: a kind of multifunctional gas-chromatograph automatic sample injector, comprise the capstan head base, capstan head base one side is provided with the sample disc assembly, the capstan head base is provided with capstan head, capstan head is provided with injector assembly, injector assembly comprises syringe and the nook closing member that assembles with syringe, nook closing member is arranged on the nook closing member fixed block, the nook closing member fixed block is driven by Timing Belt and the nook closing member fixed block synchronous pulley of vertical setting, capstan head, nook closing member fixed block synchronous pulley and sample disc are driven by the step motor with feedback coder respectively, and described feedback coder all is connected with central processing unit, and central processing unit also is connected with the man-machine interface circuit.
Vertically be provided with the installing plate assembly in the capstan head, the installing plate assembly comprises installing plate, described nook closing member fixed block synchronous pulley is a pair of and all setting up and down on installing plate, Timing Belt vertically is arranged between two synchronous pulleys, the Timing Belt inside surface is provided with the band tooth, the corresponding Timing Belt of synchronous pulley outside surface is provided with external tooth with matching, Timing Belt one side is connected with drive block, drive block is fixedly connected with the nook closing member fixed block, be provided with the toothed groove of a side in the middle of the described drive block, Timing Belt passes in the groove, and syringe vertically is arranged on the installing plate and both removably connect; Described automatic sampler also comprises another to vertical setting and the installing plate synchronous pulley that cooperatively interacts and installing plate Timing Belt, and the installing plate synchronous pulley is also driven by the step motor with feedback coder, and described installing plate is fixedly connected with the installing plate Timing Belt.
Described installing plate assembly also comprises the pressure bottle assembly that is arranged at syringe and nook closing member one side on the installing plate, the guide rod that comprises vertical setting, guide rod is interspersed in the guide pin bushing on the installing plate, guide pin bushing and installing plate removably connect, the bottom that is lower than the nook closing member end on the guide rod is installed with the briquetting of notch cuttype, guide rod between guide pin bushing bottom and the briquetting is provided with spring, the above guide rod parts transversely of guide pin bushing is provided with lateral pin, lateral pin is erected on the guide pin bushing, the notch cuttype briquetting is high-end to be fixedly connected with guide rod, and low side is corresponding with nook closing member to arrange and be provided with pin hole.
Described sample disc assembly comprises that the surface that arranges on sample disc base and the sample disc base is with the sample disc of bottle groove, step motor with feedback coder is arranged in the base of sample disc, step motor drives an output shaft that vertically arranges, the output shaft upper lateral is installed with bearing pin, the corresponding bearing pin of sample disc and output shaft are equipped with corresponding axial trough, and output shaft and bearing pin all insert in the sample disc; Sample disc base one side is provided with the insertion axle, and the corresponding axle that inserts of capstan head base is provided with axis hole, and sample disc is pegged graft by inserting axle and capstan head base.
Corresponding syringe and nook closing member are provided with at least six bottle grooves on the described capstan head base, and the bottle groove is the circular arc line style to be arranged, and the rotation diameter of the diameter of circular arc line and capstan head is suitable.
The step motor of described nook closing member fixed block synchronous pulley and installing plate synchronous pulley all is arranged at the rear portion in the capstan head; Described man-machine interface is the touch-screen that is arranged at the capstan head base outer surface.
Beneficial effect of the present invention is: all adopt the step motor with feedback coder to drive sample disc assembly, injector assembly, installing plate assembly and capstan head, form closed-loop system by step motor and scrambler, the driving of four parts is independently passage and controls, between position relationship mutually restrict, both avoided the phase mutual interference, reach again the accurate of accurate location and sample size, also guaranteed the safety of expensive syringe.Can play and increase work efficiency, save manpower, fireballing effect.The employed step motor of prior art drives nook closing member does not have position feedback device, so when the step motor step-out (this is the weakness of usefulness that step motor is consolidated), the problems such as it is inaccurate the sample extraction amount to occur, and sample introduction is incomplete, thus have influence on the testing result accuracy.Because nook closing member is arranged on the nook closing member fixed block; the movement of nook closing member fixed block is by realizing with the step motor of position feedback coding; the rotation of capstan head, the rotation of sample disc are to be driven by the step motor with scrambler too; their each self-corresponding scramblers are to each motion process real-time follow-up; whether monitor each position accurate; when having other factors to cause the step motor step-out; and alarm is shut down the situation generation of having avoided the inaccurate testing result that occurs because of inaccurate sample introduction and having damaged expensive auto injection pin owing to the position is inaccurate.Two nook closing member fixed block synchronous pulleys of injector assembly are setting up and down; then between the two Timing Belt vertically arranges; the Timing Belt inboard is all arranged the band tooth that matches with the synchronous pulley outside; then the Timing Belt of injector assembly cooperatively interacts with also adopting the band tooth being connected of drive block; when Timing Belt moves up and down; the drive drive block moves up and down; then drive block drives nook closing member fixed block and nook closing member again; it is the adjustable fabricated structure of relative position; when if the injector assembly step motor is shut down; not in stable some position; when then again starting shooting; step motor can drive first synchronous pulley and Timing Belt arrives stable some position, makes complete machine all be in origin position when every task, is conducive to like this eliminate the impact that the stable point of step motor arranges the sample size reference point.The installing plate assembly is identical with injector assembly, and also two installing plate synchronous pulleys and the installing plate Timing Belt by vertical setting drives, and then installing plate also can move with the upper underdrive of Timing Belt.During use, the bottle of the capstan head base solvent bottle of packing in the groove, waste liquid bottle, before in nook closing member inserts bottle, step motor drives the installing plate synchronous pulley and the installing plate Timing Belt is transferred installing plate first, lateral pin on the guide rod is taken to be placed on the guide pin bushing and is also transferred simultaneously, the briquetting of guide rod end is pressed in first the top of liquid bottles, when installing plate continues to transfer, spring between guide pin bushing and the guide rod is compressed and more compresses bottle cap, the installing plate stop motion, then the step motor of injector assembly drive nook closing member fixed block synchronous pulley and Timing Belt move down nook closing member, pass the deeply interior operation of bottle of pin hole of briquetting, then the step motor of injector assembly drives upwards extraction of nook closing member, and spring can be pushed down briquetting is not taken up bottle cap, fulfils assignment, guide pin bushing and installing plate removably connect, and guide rod be interspersed in the guide pin bushing by lateral pin set up with guide pin bushing on, make guide rod, guide pin bushing, the installing plate three is convenient to install for removably connecting like this, maintenance.The guide rod briquetting is arranged to the length that notch cuttype can effectively reduce the pressure bottle cover, avoids being pressed on the adjacent bottle cap.The pressure bottle assembly is when extracting solution to sample disc, and principle is identical.Touch-screen of the present invention can be realized the setting of sample introduction parameter, the data typing, and the demonstration of sample message is to controlling of this device.The step motor of described nook closing member fixed block synchronous pulley and installing plate component synchronization belt wheel all is arranged at the rear side in the capstan head, can save the space, makes compact conformation, is convenient to production and application.The touch-screen that the present invention adopts is the clear touch-screen of color high-definition, having demonstration contains much information, control conveniently, can use Chinese text, English words or other multi-language character, intuitively, large capacity ground shows sample introduction parameter, data, sample message and function button, and can switch fast easily at any time, with the requirement of the person that satisfies the different operating to operating language, compared with external similar 8 alphanumeric code tubular types or the dot matrix video screen of adopting qualitative leap has been arranged.
Description of drawings
Fig. 1 is stereographic map of the present invention;
Fig. 2 is front view of the present invention;
Fig. 3 is the vertical view of sample disc assembly;
Fig. 4 is that A among Fig. 2 is to view;
Fig. 5 is that electric control part is divided process flow diagram.
Embodiment
By Fig. 1, Fig. 2, Fig. 3 and a kind of multifunctional gas-chromatograph automatic sample injector shown in Figure 4, comprise capstan head base 5, capstan head base 5 left sides are provided with sample disc assembly 1, capstan head base 5 is provided with the capstan head 21 with housing, the capstan head 21 interior installing plate assemblies that vertically are provided with, the installing plate assembly comprises installing plate 6, installing plate 6 is provided with injector assembly, injector assembly comprises a pair of nook closing member fixed block synchronous pulley 23 that vertically arranges up and down, be equipped with vertical Timing Belt 18 on the two nook closing member fixed block synchronous pulleys 23, Timing Belt 18 inside surfaces are provided with the band tooth, the corresponding Timing Belt 18 of synchronous pulley 23 outside surfaces is provided with external tooth, Timing Belt 18 right sides vertically are provided with nook closing member fixed block 19 from top to bottom successively, nook closing member 17, with with the syringe 30 of nook closing member 17 assembling, nook closing member fixed block 19 is connected by drive block 20 with left side Timing Belt 18, drive block 20 is fixedly connected with nook closing member fixed block 19, is provided with the toothed groove in both sides in the middle of the described drive block 20, and Timing Belt 18 passes in the groove and with the interior tooth of tooth and drive block 20 grooves and matches.Be between nook closing member fixed block 19 and installing plate 6 and syringe 30 and the installing plate 6 and removably connect, nook closing member fixed block 19 is square, correspondence is provided with square draw-in groove on the installing plate 6, nook closing member fixed block 19 inserts in the draw-in groove, corresponding syringe 30 also is provided with draw-in groove on the installing plate 6, syringe 30 embeds in the draw-in groove, the draw-in groove outside surface of syringe 30 is provided with baffle plate 13, baffle plate 13 is hinged with installing plate 6, nook closing member 17 also is removably connect (method of attachment is prior art, so be not described in detail) with nook closing member fixed block 19.Described installing plate assembly also comprises the pressure bottle assembly that is arranged at syringe 30 and nook closing member 17 1 sides on the installing plate 6, the guide rod 10 that comprises vertical setting, guide rod 10 is interspersed in the cylindrical guide pin bushing 11, guide pin bushing 11 offers up and down two horizontal draw-in grooves along the border, guide rod 10 all is positioned in the mounting groove 15 of installing plate 6 with guide pin bushing 11, the guide pin bushing that 11 liang of horizontal draw-in grooves of corresponding guide pin bushing are provided with between card article 14, the corresponding two horizontal draw-in grooves on the mounting groove 15 partly is provided with clip 12, and clip 12 is for encircling respectively the two rings body in guide pin bushing 11 both sides.Guide pin bushing 11 removably connects with installing plate 6, the bottom that is lower than nook closing member 17 lower ends on the guide rod 10 is installed with the briquetting 9 of notch cuttype, guide rod 10 between guide pin bushing 11 bottoms and the briquetting 9 is provided with spring 31, guide rod 10 parts transverselies of guide pin bushing more than 11 are provided with lateral pin 32, lateral pin 32 is erected on the guide pin bushing 11, notch cuttype briquetting 9 is high-end to be fixedly connected with guide rod 10, and low side and nook closing member 17 be corresponding to arrange and be provided with pin hole 8.Installing plate 6 rear sides also vertically are provided with another to installing plate synchronous pulley 28, and are equipped with vertical installing plate Timing Belt 29 between the two installing plate synchronous pulleys 28, and installing plate 6 is fixedly arranged on the side installing plate Timing Belt 29.Nook closing member fixed block synchronous pulley 23, installing plate synchronous pulley 28 and capstan head 21 all drive with the step motor of feedback coder and driver by 3 respectively, and the step motor of injector assembly and installing plate assembly is arranged at the rear side of capstan head 21 inner tops, the step motor of capstan head 21 is arranged in the capstan head base 5 (annexation between capstan head step motor and the capstan head is prior art, so do not describe in detail).Described sample disc 2 assemblies 1 comprise that the surface that arranges on sample disc 2 bases and sample disc 2 bases is with the sample disc 2 of bottle groove 3, sample disc 2 surface bottle grooves 3 are suitable with the radius of gyration of capstan head 21, at the sample disc base 4 interior step motor 26 that arrange with feedback coder and stepper motor drives, step motor 26 drives an output shaft 25 that vertically arranges, output shaft 25 upper lateral are installed with bearing pin 24, sample disc 2 corresponding bearing pins 24 and output shaft 25 are equipped with corresponding axial trough, and output shaft 25 and bearing pin 24 all insert in the sample disc 2; Sample disc base 4 one sides are provided with the insertion axle, and the capstan head base 5 corresponding axles that insert are provided with axis hole, and sample disc base 4 is by inserting axle and 5 grafting of capstan head base.Corresponding syringe 30 and nook closing member 17 are provided with 6 bottle grooves 27 on the described capstan head base 5, and these 6 bottle grooves 27 are the circular arc line style and arrange, and the rotation diameter of the diameter of circular arc line and capstan head 21 is suitable.Top in the capstan head 21 is provided with automatically controlled part 22, automatically controlled part 22 comprises the step motor with feedback coder and driver of central processing unit and the injector assembly that all links to each other with central processing unit and installing plate assembly, drive sample disc assembly 1 and be connected being connected step motor with driver with feedback coder and also all being connected with the central processing unit circuit of capstan head 21, and on capstan head base 5, also be provided with touch-screen 7 electric control part as shown in Figure 5 that is connected with central processing unit and divide process flow diagram, injector assembly of the present invention is shown, the installing plate assembly, sample disc assembly 1 and capstan head 21 all drive with the step motor of feedback coder and driver by 4 respectively, step motor all is connected with the central processing unit circuit, so as people during to touch-screen 7 input parameter, signal passes to central processing unit, central processing unit sends signal to the different driving device, driver is sent instruction to corresponding step motor again, then step motor rotates, feedback coder can detect velocity of rotation and the angle of step motor, in case step motor step-out, signal can be passed to central processing unit, central processing unit sends corresponding instruction again, central processing unit, driver, step motor and feedback coder have formed a closed-loop system, have greatly improved efficient and accuracy rate when auto injection.During use, central processing unit also can connect PC workstation and gas chromatograph by data line, central processing unit sends enabling signal 1 and exchange data to the PC workstation, PC also can send instruction and make corresponding operating central processing unit, central processing unit sends enabling signal 2 to chromatograph, and gas chromatograph sends the countercharge signal to central processing unit.
During use, place chromatograph on capstan head base 5 right sides, in the bottle groove 3 of sample disc 2, pack into sample bottle and in 6 bottle grooves 27 of capstan head base 5, pack into three solvent bottles and three waste liquid bottles.Then input parameter on touch-screen 7, the data-interface of automatically controlled part 22 can connect chromatograph.During use, rotate first capstan head 21, the bottle for handling liquid toilet or cosmetic substance that nook closing member 17 is aimed on the capstan head base 5, step motor drives installing plate synchronous pulley 28 and the installing plate Timing Belt 29 of installing plate assembly and first installing plate 6 is transferred, before nook closing member 17 inserts in the bottle, lateral pin 32 on the guide rod 10 is taken to be placed on the guide pin bushing 11 and is also transferred simultaneously, the briquetting 9 of guide rod 10 ends is pressed in first the top of liquid bottles, when installing plate 6 continues to transfer, spring 31 between guide pin bushing 11 and the guide rod 10 is compressed and more compresses bottle cap, installing plate 6 stop motions, then the step motor of injector assembly drive nook closing member fixed block synchronous pulley 23 and Timing Belt 18 move down nook closing member 17, pass the deeply interior operation of bottle of pin hole 8 of briquetting 9, then the step motor of injector assembly drives upwards extraction of nook closing member 17, spring 31 can be pushed down briquetting 9 is not taken up bottle cap, by step motor installing plate 6 is risen again, capstan head 21 drives clockwise or rotates counterclockwise angle by step motor, until nook closing member 17 is aimed at waste liquid bottle, then installing plate 6 is transferred again, briquetting 9 is compressed bottle cap, utilize step motor to transfer nook closing member 17, wash bottle liquid is got waste liquid bottle, finish and once wash the pin process.Washing pin process number of times can be set by the user, then utilize step motor that capstan head 21 is clockwise rotated, make nook closing member 17 towards the sample bottle of sample disc 2, sample disc 2 turns to the position that is set by the user by step motor 26, and then installing plate 6, nook closing member 17 are transferred successively, draw samples liquid, installing plate 6 rises again, and capstan head 21 rotates counterclockwise, until to capstan head base 5 opposite sides, installing plate 6, nook closing member 17 are transferred successively, the sample of obtaining is inputed to gas chromatograph.
Claims (4)
1. multifunctional gas-chromatograph automatic sample injector, comprise the capstan head base, capstan head base one side is provided with the sample disc assembly, the capstan head base is provided with capstan head, capstan head is provided with injector assembly, injector assembly comprises syringe and the nook closing member that assembles with syringe, nook closing member is arranged on the nook closing member fixed block, the nook closing member fixed block is driven by Timing Belt and the nook closing member fixed block synchronous pulley of vertical setting, it is characterized in that: capstan head, nook closing member fixed block synchronous pulley and sample disc are driven by the step motor with feedback coder respectively, described feedback coder all is connected with central processing unit, and central processing unit also is connected with the man-machine interface circuit; Vertically be provided with the installing plate assembly in the capstan head, the installing plate assembly comprises installing plate, described nook closing member fixed block synchronous pulley is a pair of and setting up and down on installing plate, Timing Belt vertically is arranged between two synchronous pulleys, the Timing Belt inside surface is provided with the band tooth, the corresponding Timing Belt of synchronous pulley outside surface is provided with external tooth with matching, Timing Belt one side is connected with drive block, drive block is fixedly connected with the nook closing member fixed block, be provided with the toothed groove of a side in the middle of the described drive block, Timing Belt passes in the groove, and syringe vertically is arranged on the installing plate and both removably connect; Described automatic sampler also comprises another to vertical setting and the installing plate synchronous pulley that cooperatively interacts and installing plate Timing Belt, and the installing plate synchronous pulley is also driven by the step motor with feedback coder, and described installing plate is fixedly connected with the installing plate Timing Belt; Described installing plate assembly also comprises the pressure bottle assembly that is arranged at syringe and nook closing member one side on the installing plate, the guide rod that comprises vertical setting, guide rod is interspersed in the guide pin bushing on the installing plate, guide pin bushing and installing plate removably connect, the bottom that is lower than the nook closing member end on the guide rod is installed with the briquetting of notch cuttype, guide rod between guide pin bushing bottom and the briquetting is provided with spring, the above guide rod parts transversely of guide pin bushing is provided with lateral pin, lateral pin is erected on the guide pin bushing, the notch cuttype briquetting is high-end to be fixedly connected with guide rod, and low side is corresponding with nook closing member to arrange and be provided with pin hole.
2. multifunctional gas-chromatograph automatic sample injector as claimed in claim 1, it is characterized in that: described sample disc assembly comprises that the surface that arranges on sample disc base and the sample disc base is with the sample disc of bottle groove, step motor with feedback coder is arranged in the base of sample disc, step motor drives an output shaft that vertically arranges, the output shaft upper lateral is installed with bearing pin, the corresponding bearing pin of sample disc and output shaft are equipped with corresponding axial trough, and output shaft and bearing pin all insert in the sample disc; Sample disc base one side is provided with the insertion axle, and the corresponding axle that inserts of capstan head base is provided with axis hole, and sample disc is pegged graft by inserting axle and capstan head base.
3. multifunctional gas-chromatograph automatic sample injector as claimed in claim 2, it is characterized in that: corresponding syringe and nook closing member are provided with at least six bottle grooves on the described capstan head base, and a bottle groove is the circular arc line style to be arranged, and the rotation diameter of the diameter of circular arc line and capstan head is suitable.
4. multifunctional gas-chromatograph automatic sample injector as claimed in claim 3 is characterized in that: the step motor of described nook closing member fixed block synchronous pulley and installing plate synchronous pulley all is arranged at the rear portion in the capstan head; Described man-machine interface is the touch-screen that is arranged at the capstan head base outer surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910208184 CN101819193B (en) | 2009-10-23 | 2009-10-23 | Multifunctional gas-chromatograph automatic sample injector |
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| CN 200910208184 CN101819193B (en) | 2009-10-23 | 2009-10-23 | Multifunctional gas-chromatograph automatic sample injector |
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| CN101819193A CN101819193A (en) | 2010-09-01 |
| CN101819193B true CN101819193B (en) | 2013-01-23 |
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| CN102520076B (en) * | 2011-12-31 | 2013-07-17 | 青岛普仁仪器有限公司 | Automatic sample injector |
| CN103472163B (en) * | 2012-06-06 | 2017-08-25 | 北京普源精仪科技有限责任公司 | Automatic sampler and liquid chromatograph with pressure bottle function |
| CN103472164B (en) * | 2012-06-06 | 2016-12-21 | 北京普源精仪科技有限责任公司 | A kind of specimen disc structure of automatic sampler |
| CN104007279B (en) * | 2014-06-04 | 2016-05-04 | 上海宏莘科技发展有限公司 | The pressure-off formula charging of automatic sampler moves material discharge system |
| CN104007276B (en) * | 2014-06-04 | 2016-05-04 | 上海宏莘科技发展有限公司 | Revolve off-type digital-code type fully-automatic intelligent sampler |
| CN103995142B (en) * | 2014-06-04 | 2016-05-04 | 上海宏莘科技发展有限公司 | The de-formula charging of folder of automatic sampler moves material discharge system |
| CN104034559B (en) * | 2014-06-04 | 2016-05-11 | 上海宏莘科技发展有限公司 | Be pressed into type digital-code type fully-automatic intelligent sampler |
| CN103994898B (en) * | 2014-06-04 | 2017-04-19 | 上海宏莘科技发展有限公司 | Door opening type discharge system of automatic sampling machine |
| CN103995141B (en) * | 2014-06-04 | 2016-05-04 | 上海宏莘科技发展有限公司 | The separation-type charging of automatic sampler moves material discharge system |
| CN107329424B (en) * | 2017-06-29 | 2020-10-09 | 华南农业大学 | Automatic and manual mode switching device of agricultural machine, control method of automatic and manual mode switching device and agricultural machine |
| CN107991422B (en) * | 2017-11-22 | 2020-07-24 | 中国石油大学(北京) | Hot-splitting gas chromatography solid automatic sample feeding hot-splitting device |
| CN107991505A (en) * | 2017-12-21 | 2018-05-04 | 睿科仪器（厦门）有限公司 | A kind of auto spring puncture needle sampling structure |
| CN111122751B (en) * | 2020-01-16 | 2024-07-02 | 河南阿尔法科学仪器有限公司 | Full-automatic turret type solid-phase microextraction, headspace and liquid sample injection integrated device |
| CN114252542A (en) * | 2021-11-19 | 2022-03-29 | 贵阳学院 | Universal gas chromatography sample injector |
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| CN101819193A (en) | 2010-09-01 |
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