WO2014030498A1 - 液体クロマトグラフ装置及び送液装置 - Google Patents
液体クロマトグラフ装置及び送液装置 Download PDFInfo
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- WO2014030498A1 WO2014030498A1 PCT/JP2013/070407 JP2013070407W WO2014030498A1 WO 2014030498 A1 WO2014030498 A1 WO 2014030498A1 JP 2013070407 W JP2013070407 W JP 2013070407W WO 2014030498 A1 WO2014030498 A1 WO 2014030498A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/24—Automatic injection systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/34—Control of physical parameters of the fluid carrier of fluid composition, e.g. gradient
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/32—Control of physical parameters of the fluid carrier of pressure or speed
- G01N2030/326—Control of physical parameters of the fluid carrier of pressure or speed pumps
Definitions
- the present invention relates to a liquid chromatograph apparatus and a liquid transfer apparatus.
- the liquid chromatograph adds the sample to be analyzed to the solvent (eluent) sent by the liquid delivery device, separates the components of the sample in the separation column, and sends each component sent at different times with a detector such as a spectrometer It is an analyzer which detects and specifies the component of a sample.
- liquid transfer device for liquid chromatograph there is known a method of transferring an eluting solution by a plunger reciprocating in a cylinder.
- the separation degree of the sample to be analyzed in the separation column is improved by sending the liquid while changing the composition of the eluent using a plurality of eluents.
- a liquid feeding system called a low pressure gradient system in which the compositions of a plurality of eluents are changed under the low pressure condition from the atmospheric pressure on the upstream side of a cylinder for liquid feeding.
- a mechanism that changes the composition of the eluent installed on the upstream side of the liquid transfer device when the liquid transfer device starts suction (generally, the open / close time of the on-off valve connected to each eluent) Is adjusted by changing the composition of the eluent during the aspiration time, and a plurality of eluents are aspirated by the liquid delivery apparatus.
- the composition of the eluent is changed on the upstream side of the liquid delivery apparatus, so that the mixing performance of the eluent may be lowered as the delivery pressure becomes higher.
- Patent Document 1 proposes a method of calculating based on a prediction the time for which the pressure from the liquid delivery pressure to the atmospheric pressure is reduced and correcting the time for changing the composition of the mixing ratio.
- each eluent has different values for physical properties such as bulk modulus. In addition, these factors may change under the influence of various conditions such as the temperature of the eluent.
- An object of the present invention is to provide an apparatus having a low-pressure gradient method that is accurate and accurate regardless of the type and temperature of the eluent, the composition of the mixing ratio, and the pressure of liquid feeding, and a method using the apparatus.
- a pump unit having a cylinder having a suction port and a discharge port for the eluent, and a plunger reciprocating in the cylinder, and performing suction and discharge of the eluent.
- a valve unit for switching the types of a plurality of eluents to be sucked by the pump unit by opening and closing; a pressure sensor for detecting the pressure of the eluent discharged from the outlet of the pump unit; A control unit configured to control the pressure reduction section until the suction of the eluent is started after the plunger starts the suction operation of the plurality of eluents; After the decompression section, an actual suction section where the eluant is actually sucked is determined, and control is performed so that the opening / closing operation of the valve means is performed in the determined actual suction section.
- the figure which shows the outline of a structure of a liquid chromatograph apparatus The figure which shows an example of a structure of the liquid feeding apparatus mounted in a liquid chromatograph apparatus.
- the flowchart which shows the procedure of liquid feeding which concerns on embodiment of this invention.
- FIG. 1 shows the schematic of the pressure change of a 1st cylinder, the liquid feeding state of a cylinder, a non-return valve, and the state of an on-off valve based on embodiment of this invention.
- FIG. 2 shows the structural example of a liquid feeding apparatus different from embodiment shown in FIG. 2 .
- FIG. 1 shows an outline of the configuration of a liquid chromatograph apparatus that performs liquid delivery by a low pressure gradient method.
- a plurality of types of eluents stored in the plurality of containers 1a to 1d are selected by the switching device 2 having the plurality of on-off valves, and are sucked and discharged by the liquid feeding device 3.
- the ejected eluent is sent to the switching device 2.
- the switching device 2 can change the mixing ratio of the eluents sent from the liquid feeding device 3 by selectively switching the eluents in the containers 1a to 1d, and can change the composition ratio of the eluents.
- the sample injection unit 4 injects a liquid sample to be analyzed into the flow path of the eluent switched by the switching device 2.
- the injected liquid sample is separated for each component in the separation column 5. Because of differences in molecular weight, hydrophobicity, charge, etc., the time to come out of the separation column 5 differs in each component.
- the separation column 5 may be installed in a column oven to keep the temperature constant.
- the detector 6 detects each component coming out of the separation column 5 with a time difference.
- FIG. 2 shows an example of the configuration of the liquid delivery device 3 shown in FIG.
- the cam converts the rotational movement of the motor into a reciprocating movement of the plunger.
- the rotational motion of the motor 21 is transmitted to the camshaft 17 by the belt 18, and the first plunger 13 reciprocates by the first cam 15, and the second plunger 14 reciprocates by the second cam 16.
- the rotational speed of the camshaft 17 is recognized by the control unit 22.
- a disk 19 provided with a slit is attached to a camshaft 17, and the sensor 20 detects the slit by a method such as optics, capacitance, magnetic lines, etc.
- the rotational speed of the camshaft 17 can be detected.
- the pipe downstream of the second cylinder 11 is provided with a pressure sensor 12 for measuring the pressure in the pipe, and the value of the pressure in the pipe measured by the pressure sensor 12 is sent to the control unit 22.
- the control unit 22 controls the number of rotations of the motor 21 according to the value of the pressure in the pipe, and the number of rotations of the camshaft 17 is measured by the sensor 20 described above and sent to the control unit 22. The speed is adjusted.
- the plurality installed in the switching device 2 in the section where the inlet side check valve 8 in the suction operation section of the first cylinder 9 is open.
- the on-off valves 7a to 7d perform the on-off operation.
- the control unit 22 changes the mixing ratio by adjusting the opening and closing times and timings of the on-off valves 7a to 7d corresponding to the corresponding eluent to realize various composition ratios of the eluent.
- FIG. 4 is a part of a block diagram of a control unit (data processing apparatus) 22 according to the embodiment of the present invention.
- the data processing apparatus 22 also includes an arithmetic processing unit (for example, a CPU) as an arithmetic unit for executing various programs, and a storage for storing various data including the program.
- a storage device as means is provided, and an input / output operation processing device for performing input / output control such as data and instructions to each device.
- the data processing device 22 includes an input unit 24, an operation unit 25, a storage unit 26, a liquid transfer control unit 27, and an output unit 28.
- the input unit 24 sets the number of pulses S offset in the pressure reduction section and the number of pulses S R in the actual suction section in the calculation section 25 in addition to setting conditions (for example, flow rate, mixing ratio, time etc.) related to control of the liquid delivery device 3.
- setting conditions for example, flow rate, mixing ratio, time etc.
- a variety of information for example, plunger movement distance l, cylinder volume V ALL , diameter of plunger d, number of pulses in suction section S S , liquid transfer pressure
- a variety of information for example, plunger movement distance l, cylinder volume V ALL , diameter of plunger d, number of pulses in suction section S S , liquid transfer pressure
- the suction section is the entire section in which the first plunger 13 is performing suction operation
- the pressure reducing section is the pressure in the cylinder reduced to atmospheric pressure after the first plunger 13 starts the suction operation
- the section until the inlet side check valve 8 is opened, the actual suction section is the section where the eluant is actually sucked.
- the calculation unit 25 performs calculations based on the information input from the input unit 24 based on calculation formulas described later. Specifically, determining the number of pulses S offset decompression section by the pulse number S offset acquisition unit of the vacuum section, the pulse number S R acquisition of real absorption zone the number of pulses S R of real absorption sections respectively.
- Storage unit 26 is a portion where information input via the input unit 24, and the pulse number S offset decompression section determined by the arithmetic unit 25, the pulse number S R of real absorption section is stored.
- Liquid feed control section 27 the pulse number S offset decompression section stored in the storage unit 26, on the basis of the pulse number S R of real absorption section is a portion for controlling the feeding device 3. Specifically, an instruction is given to control the operation of the pump unit 23 and the on-off valve 7.
- the output device 28 outputs a control signal to the liquid delivery device 3 based on the instruction acquired from the fluid delivery control unit 27.
- FIG. 3 is a graph showing an example of pressure change in the suction section in the liquid sending step of the liquid sending device.
- the horizontal axis indicates the number of pulses (n) of the motor 21 required for the operation of the plunger, and the vertical axis indicates the value (MPa) of the pressure detected by the pressure sensor 12.
- S s represents the number of pulses in the suction section
- S offset represents the number of pulses in the pressure reduction section
- S R represents the number of pulses in the actual suction section.
- FIG. 5 is an operation flow of the liquid delivery device 3 according to the embodiment of the present invention.
- FIG. 7 shows a schematic view of the pressure change of the first cylinder 9 and an example of the operation state of the suction side check valve, the discharge side check valve and the on-off valve in the liquid feeding process. Further, FIG. 7 also shows an example of the pressure change of the suction section shown in FIG. 3 and the open / close timing of the open / close valve at that time.
- Liquid transfer control according to the present embodiment will be described based on FIGS. 3, 5, and 7.
- the inside of the first cylinder 9 is filled with the elution liquid by the suction operation of the first plunger 13, and when the filling is completed (S505), the pushing operation of the first plunger 13 is then started (S506).
- the discharge check valve 10 is opened (S509), and the second plunger 14 of the second cylinder 11 is the first plunger.
- the suction operation is performed in synchronization with the push-in operation 13 and the inside of the second cylinder 11 is filled with the eluent (S510).
- FIG. 6 is a flowchart showing the operation procedure according to the embodiment of the present invention and the processing of the data processing apparatus 110 accompanying it.
- the ⁇ 1> inlet side check valve 8 is closed (S503), and ⁇ 2> after the pushing operation of the first plunger 13 is started. (S506), ⁇ 3>
- the pressure in the first cylinder 9 reaches the pressure P of the eluent discharged from the second cylinder 11 (S508), ⁇ 4> until the discharge side check valve 10 is opened (S509)
- the movement distance l C of the required first plunger 13 is measured (S601).
- the moving distance l C at this time is measured by the input unit 24 of the data processing device 22.
- the input unit 24 of the data processing device 22 For example, when using a stepping motor, it can be obtained from the number of pulses.
- the displacement distance l offset of the plunger 13 to reduce the pressure dV, V d , dV C , the plunger 13 movement distance l c of the compression step, and the plunger 13 movement distance l d of the liquid feeding step Is required.
- S offset is expressed by the following equation using the above equation and the pulse number conversion coefficient k.
- the number of pulses S R in the actual suction section is obtained from the following formula from the number of pulses S offset calculated based on the above equation (2) and the number of pulses S S in the suction section.
- the control unit 22 performs the above calculation, the number of pulses S R in the real suction section obtained here, by adjusting the opening and closing times and timing of the opening and closing valves 7a ⁇ 7d (S605), precisely and accurately It is possible to realize a good mixing ratio.
- the configuration of the liquid delivery device 3 shown in FIG. 2 is controlled by the pressure measured by the pressure sensor 12 connected to the second cylinder 11.
- the invention can be applied to a liquid delivery apparatus in which a pressure sensor is added between the inlet side check valve 8 and the discharge side check valve 10.
- the pressure in the first cylinder 9 can be directly measured by the added pressure sensor, so that the first cylinder 9 compresses more accurately from the atmospheric pressure to the pressure at which the second cylinder 11 feeds liquid. It is possible to send liquid with small pressure pulsation.
- FIG. 2 shows a series type liquid transfer apparatus in which two cylinders are connected in series
- a parallel type liquid transfer in which two cylinders are connected in parallel
- the low pressure gradient liquid transfer method is applicable to a device or a liquid transfer device in which each cylinder has a motor and a plunger is driven independently, regardless of the drive method of the liquid transfer device.
- FIG. 8 shows an example of a liquid feeding apparatus characterized in that each cylinder has an independent drive unit and a motor and the plunger is driven independently, unlike the embodiment shown in FIG. In this example, the rotational movement of the motor is converted into a linear movement by the linear movement drive unit connected to the motor to drive the plunger.
- the rotational motions of the motors 42 and 43 are transmitted to the linear motion drive units 38 and 39, and the plungers 34 and 35 reciprocate by the reciprocating motion of the linear motion drive units.
- a ball screw is mentioned, for example.
- the moving direction of each plunger is determined by the rotation direction of the connected motor, and the moving distance of the plunger is recognized by the number of rotations of the motor. In particular, when a stepping motor is used, the moving distance of the plunger can be counted as the number of pulses.
- the positions of the plungers 34 and 35 are recognized by the control unit 44 using the detection plates 36 and 37 provided in the linear drive units 38 and 39 and the sensors 40 and 41 detecting by methods such as optics, capacitance, and magnetic lines of force. Ru. Unlike the detection method shown in the present embodiment, the position and the movement distance of the plunger can also be recognized by using a rotary encoder or the like.
- the pipe downstream of the second cylinder 32 is provided with a pressure sensor 33 that measures the pressure in the pipe, and the value of the pressure in the pipe measured by the pressure sensor 33 is sent to the control unit 44.
- the control unit 44 controls the number of rotations of each motor according to the value of pressure in the pipe and the flow rate of liquid feed, and adjusts the moving distance and moving speed of the plunger.
- FIG. 9 shows an example of a liquid feeding apparatus characterized in that the cylinders are connected in parallel, unlike the embodiment shown in FIG.
- the switching device 2 having the switching valves 7a to 7d upstream of the branch point 45 for supplying the solvent to the first cylinder 47 and the second cylinder 50 is used. It needs to be installed.
- each connected cylinder is characterized by having a suction, compression and discharge process of a solvent.
- the second cylinder 50 alone discharges to the downstream system, and the second cylinder 50 finishes the compression process of the suctioned solvent from the solvent suction Until the first cylinder 47 alone discharges to the downstream system.
- the control unit 62 adjusts the open / close time and timing of the open valves 7a to 7d, and changes the mixing ratio to change the composition ratio of the eluent.
- the pushing operation of the first plunger 53 is started and the generated fluid flow closes the inlet-side check valve 46 and the eluant in the first cylinder 47 is compressed. .
- the second cylinder 50 continuing the liquid delivery decelerates while compensating for the discharge of the first cylinder 47 so that the pressure fluctuation does not occur so that the delivery liquid flow rate becomes constant.
- the opening / closing operation of the on-off valves 7a to 7d is adjusted using the calculated S 1R and S 1offset .
- the discharge side check valve 51 of the second cylinder 50 is closed by the fluid flow generated by the discharge from the first cylinder 47, and the single discharge by the first cylinder 47 is shifted. Do. In the discharge section of the first cylinder 47, the second cylinder 50 performs suction of the solvent by the suction operation and compression to the pressure for sending the suctioned solvent.
- first cylinder 47 continuing the liquid feeding is decelerated while compensating for the discharge of the second cylinder 50 so that the pressure fluctuation does not occur so that the liquid feeding flow rate becomes constant.
- the compression ratio V2P of the second cylinder 50 is calculated as in the first cylinder.
- the on / off valve is controlled using the number of pulses of the plunger in each of the suction section, the pressure reduction section, and the actual suction section, but the application target of the present invention is not limited to this. For example, it is also possible to perform control based on time (sec) in consideration of the moving speed of the plunger.
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Abstract
Description
各シリンダの圧縮工程で制御ユニットより算出されるプランジャ移動距離lと、プランジャ移動距離lから算出される減圧区間と実吸引区間に基づいて各シリンダの吸引工程時の切換え弁の切換時間を調整することで本発明を適応することができる。
2 切換装置
3 送液装置
4 試料注入部
5 分離カラム
6 検出器
7 開閉弁
8、29、46、49 入口側逆止弁
9、30、47 第1シリンダ
10、31、48、51 吐出側逆止弁
11、32、50 第2シリンダ
12、33、52 圧力センサ
13、34、53 第1プランジャ
14、35、54 第2プランジャ
15、55 第1カム
16、56 第2カム
17、57 カムシャフト
18、58 ベルト
19、59 円板
20、60 センサ
21、61 モータ
22、44、62 制御ユニット(データ処理装置)
23 ポンプ部
24 入力部
25 演算部
26 記憶部
27 送液制御部
28 出力部
36、37 検知板
38 第1直動駆動部
39 第2直動駆動部
40 第1センサ
41 第2センサ
42 第1モータ
43 第2モータ
45 分岐部
Claims (14)
- 溶離液の吸入口と吐出口を有するシリンダと、前記シリンダ内を往復運動するプランジャと、を有し、前記溶離液の吸引、吐出を行う送液ポンプと、
前記送液ポンプが吸引する複数の溶離液の種類を開閉動作によって切り替える弁手段と、
前記送液ポンプの吐出口から吐出される溶離液の圧力を検出する圧力センサと、
当該吐出された溶離液の流路中に液体試料を注入するオートサンプラと、
当該注入された液体試料を成分ごとに分離するカラムと、
当該分離された各成分を成分ごとに検出する検出器と、
前記弁手段の開閉動作を制御する制御部と、を有する液体クロマトグラフ装置であって、
前記制御部は、
前記プランジャが当該複数の溶離液の吸引動作を開始したのち、前記溶離液の吸引が開始されるまでの減圧区間と、
前記減圧区間ののちに、前記溶離液が実際に吸引されている実吸引区間と、を求め、
前記弁手段の開閉動作が、当該求めた実吸引区間内において行われるように制御することを特徴とする液体クロマトグラフ装置。 - 請求項1に記載された液体クロマトグラフ装置において、
前記制御部は、前記プランジャが前記溶離液の圧縮動作を開始してから、当該吸引した溶離液を吐出するまでに要する前記プランジャの移動距離に基づいて、
前記プランジャが、前記減圧区間に要するパルス数と、前記実吸引区間に要するパルス数と、を求めることを特徴とする液体クロマトグラフ装置。 - 請求項1に記載された液体クロマトグラフ装置において、
前記制御部は、前記プランジャが前記溶離液の圧縮動作を開始してから、当該吸引した溶離液を吐出するまでに要する前記プランジャの移動距離に基づいて、
前記プランジャが、前記減圧区間に移動する距離と、前記実吸引区間に移動する距離と、を求めることを特徴とする液体クロマトグラフ装置。 - 請求項1に記載された液体クロマトグラフ装置において、
前記制御部は、
前記実吸引区間内において、当該吸引される溶離液の混合比を変化させるように、前記弁手段の開閉動作を制御することを特徴とする液体クロマトグラフ装置。 - 請求項1に記載された液体クロマトグラフ装置において、
前記シリンダ内の圧力を検出する圧力センサをさらに備え、
前記制御部は、
前記シリンダ内の圧力を検出する圧力センサから検出される第1の圧力値と、
前記ポンプの吐出口から吐出される溶離液の圧力を検出する圧力センサから検出される第2の圧力値と、に基づいて、
当該溶離液の送液を制御することを特徴とする液体クロマトグラフ。 - 請求項5に記載された液体クロマトグラフ装置において、
前記制御部は、
前記プランジャが前記溶離液の圧縮動作を開始してから、当該吸引した溶離液を吐出するまでに要する前記プランジャの移動距離に基づいて、
前記プランジャが、前記減圧区間に要するパルス数と、前記実吸引区間に要するパルス数と、を求めることを特徴とする液体クロマトグラフ装置。 - 請求項5に記載された液体クロマトグラフ装置において、
前記制御部は、
前記プランジャが前記溶離液の圧縮動作を開始してから、当該吸引した溶離液を吐出するまでに要する前記プランジャの移動距離に基づいて、
前記プランジャが、前記減圧区間に移動する距離と、前記実吸引区間に移動する距離と、を求めることを特徴とする液体クロマトグラフ装置。 - 溶離液の吸引口と吐出口を有するシリンダと、前記シリンダ内を往復運動するプランジャと、を有し、吸入口と吐出口を有するシリンダと、前記シリンダ内を往復運動するプランジャと、を有し、前記溶離液の吸引、吐出を行うポンプ部と、
前記ポンプ部が吸引する複数の溶離液の種類を開閉動作によって切り替える弁手段と、
前記ポンプ部の吐出口から吐出される溶離液の圧力を検出する圧力センサと、
前記弁手段の開閉動作を制御する制御部と、を有する送液装置であって、
前記制御部は、
当該複数の溶離液を吸引するときに前記プランジャが吸引動作を開始する吐出圧力から、前記溶離液が吸引され始めるまでの減圧区間と、
前記減圧区間ののちに、前記溶離液が実際に吸引されている実吸引区間と、を求め、
前記弁手段の開閉動作が、当該求めた実吸引区間内において行われるように制御することを特徴とする送液装置。 - 請求項8に記載された送液装置において、
前記制御部は、前記プランジャが前記溶離液の圧縮動作を開始してから、当該吸引した溶離液を吐出するまでに要する前記プランジャの移動距離に基づいて、
前記プランジャが、前記減圧区間に要するパルス数と、前記実吸引区間に要するパルス数と、を求めることを特徴とする送液装置。 - 請求項8に記載された送液装置において、
前記制御部は、前記プランジャが前記溶離液の圧縮動作を開始してから、当該吸引した溶離液を吐出するまでに要する前記プランジャの移動距離に基づいて、
前記プランジャが、前記減圧区間に移動する距離と、前記実吸引区間に移動する距離と、を求めることを特徴とする送液装置。 - 請求項8に記載された送液装置において、
前記制御部は、前記実吸引区間内において、当該吸引される溶離液の混合比を変化させるように、前記弁手段の開閉動作を制御することを特徴とする送液装置。 - 請求項8に記載された送液装置において、
前記シリンダ内の圧力を検出する圧力センサをさらに備え、
前記制御部は、
前記シリンダ内の圧力を検出する圧力センサから検出される第1の圧力値と、
前記ポンプ部の吐出口から吐出される溶離液の圧力を検出する圧力センサから検出される第2の圧力値と、に基づいて、
当該溶離液の送液を制御することを特徴とする送液装置。 - 請求項10に記載された送液装置において、
前記制御部は、
前記プランジャが前記溶離液の圧縮動作を開始してから、当該吸引した溶離液を吐出するまでに要する前記プランジャの移動距離に基づいて、
前記プランジャが、前記減圧区間に要するパルス数と、前記実吸引区間に要するパルス数と、を求めることを特徴とする送液装置。 - 請求項10に記載された液体クロマトグラフ装置において、
前記制御部は、
前記プランジャが前記溶離液の圧縮動作を開始してから、当該吸引した溶離液を吐出するまでに要する前記プランジャの移動距離に基づいて、
前記プランジャが、前記減圧区間に移動する距離と、前記実吸引区間に移動する距離と、を求めることを特徴とする送液装置。
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JP2014531560A JP5887412B2 (ja) | 2012-08-23 | 2013-07-29 | 液体クロマトグラフ装置及び送液装置 |
DE112013003747.5T DE112013003747T5 (de) | 2012-08-23 | 2013-07-29 | Flüssigkeitschromatographiegerät und Flüssigkeitsabgabegerät |
CN201380041151.5A CN104508478B (zh) | 2012-08-23 | 2013-07-29 | 液体色谱仪装置以及送液装置 |
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JP2019082437A (ja) * | 2017-10-31 | 2019-05-30 | アークレイ株式会社 | 送液方法 |
CN115166119A (zh) * | 2022-06-30 | 2022-10-11 | 鲲鹏仪器(大连)有限公司 | 一种高效液相色谱仪的高精度低压梯度方法 |
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CN107632057A (zh) * | 2017-10-31 | 2018-01-26 | 苏州市苏测检测技术有限公司 | 食品快速连续检测装置 |
CN108217913A (zh) * | 2018-02-05 | 2018-06-29 | 苏州思上环保科技有限公司 | 一种污水灭菌装置 |
JP7186113B2 (ja) * | 2019-03-01 | 2022-12-08 | 株式会社日立ハイテク | 送液ポンプ、液体クロマトグラフ装置 |
CN115190942A (zh) * | 2020-03-24 | 2022-10-14 | 株式会社日立高新技术 | 送液装置以及送液方法 |
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CN104508478B (zh) | 2016-08-24 |
DE112013003747T5 (de) | 2015-08-20 |
JP5887412B2 (ja) | 2016-03-16 |
JPWO2014030498A1 (ja) | 2016-07-28 |
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