CN214252164U - Shunting device with adjustable shunting proportion and liquid chromatograph using same - Google Patents
Shunting device with adjustable shunting proportion and liquid chromatograph using same Download PDFInfo
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- CN214252164U CN214252164U CN202023284770.3U CN202023284770U CN214252164U CN 214252164 U CN214252164 U CN 214252164U CN 202023284770 U CN202023284770 U CN 202023284770U CN 214252164 U CN214252164 U CN 214252164U
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Abstract
The utility model discloses a flow dividing device with adjustable flow dividing proportion and a liquid chromatograph using the same, wherein the flow dividing device with adjustable flow dividing proportion comprises a three-way adapter, a flow dividing pump and a controller; the three-way adapter is provided with a liquid inlet suitable for being connected with liquid, a first liquid outlet which is communicated with the liquid inlet and is suitable for discharging the liquid, and a second liquid outlet which is communicated with the liquid inlet and is suitable for discharging the liquid; the flow dividing pump is connected with the first liquid outlet and is suitable for pumping the liquid flowing out of the first liquid outlet; the controller is in control connection with the flow dividing pump and is suitable for controlling the rotating speed of the flow dividing pump so as to control the liquid flow of the first liquid outlet. The utility model discloses can be with liquid reposition of redundant personnel and can freely adjust reposition of redundant personnel proportion, convenient to use.
Description
Technical Field
The utility model relates to a reposition of redundant personnel device of reposition of redundant personnel proportion adjustable and use its liquid chromatograph.
Background
At present, preparative liquid chromatography belongs to a branch of the technical field of liquid chromatography, and is different from traditional High Performance Liquid Chromatography (HPLC), the main purpose of preparative liquid chromatography is not to qualitatively or quantitatively analyze the content of each component in a sample, but to remove impurities from the sample, and finally obtain a target product meeting the purity requirement. Therefore, in the preparative liquid chromatography technology, users pay more attention to technical indexes such as sample loading amount, purity and recovery rate of target products, separation efficiency, consumption cost and the like.
In liquid chromatography, ultraviolet-visible absorption detection and evaporative light scattering detection are most commonly used. The ultraviolet and visible light absorption detection requires that a molecular structure of a sample has a specific group capable of absorbing energy of a light source of a detector, such as a conjugated double bond structure with strong absorption in an ultraviolet light region. For samples lacking the above specific groups in the molecular structure, the uv-vis absorption detection can only be used for on-line monitoring when the sample is separated or collected. The evaporative light scattering detection is a good supplement to ultraviolet and visible light absorption detection, no specific structural requirements are provided for sample molecules, the sample molecules can be atomized and evaporated in the evaporative light scattering detector only by meeting the requirement that the volatility of the sample molecules is higher than that of mobile phase molecules, the atomized sample molecules are irradiated by incident light, and then the generated scattered light is detected, so that the detection signals of the sample molecules can be obtained.
Conventional preparative liquid chromatographs are equipped with an ultraviolet-visible light detector and an evaporative light scattering detector, wherein after a sample is split by a splitting device, a portion of the sample flows into the ultraviolet-visible light detector and the other portion flows into the evaporative light scattering detector. Since the uv-vis detector is equipped with a flow cell for on-line monitoring of the flowing liquid, it is a non-destructive detector, i.e. the sample in the system line can be collected nondestructively into a designated collection vessel, which is particularly important for collecting the target product, directly related to the recovery of the target product. In contrast, the evaporative light scattering detector is a destructive detector, i.e. a sample entering the detector is discharged as an exhaust gas and cannot be collected, so that the problem of the proportion of the sample shunted to the evaporative light scattering detector needs to be considered, and if the shunting proportion is too high, the more samples are discarded, and the lower the recovery rate of the target product is; if the split ratio is too low, the sample may not be detected due to sensitivity problems of the evaporative light scattering detector.
Traditional diverging device is a fixed proportion three-way valve, and fixed proportion three-way valve is because of the fixed unable regulation of reposition of redundant personnel proportion, uses inconveniently. In a preparative liquid chromatograph using a three-way valve with a fixed proportion as a flow dividing device, too few samples are divided at a low flow rate and enter the evaporative light scattering detector, and the sensitivity requirement of the detector can not be met, so that the samples cannot be detected; for high flow rates, too much sample is diverted into the evaporative light scattering detector, causing detector signal overflow and loss of a large amount of sample.
Disclosure of Invention
The utility model aims to solve the technical problem that overcome prior art's defect, provide a reposition of redundant personnel device of reposition of redundant personnel proportion adjustable, it can be with liquid reposition of redundant personnel and can freely adjust reposition of redundant personnel proportion, convenient to use.
In order to solve the technical problem, the technical scheme of the utility model is that: a flow dividing device with adjustable flow dividing proportion comprises a three-way adapter, a flow dividing pump and a controller; wherein the content of the first and second substances,
the three-way adapter is provided with a liquid inlet suitable for accessing liquid, a first liquid outlet which is communicated with the liquid inlet and is suitable for discharging the liquid, and a second liquid outlet which is communicated with the liquid inlet and is suitable for discharging the liquid;
the flow dividing pump is connected with the first liquid outlet and is suitable for pumping the liquid flowing out of the first liquid outlet;
the controller is in control connection with the flow dividing pump and is suitable for controlling the rotating speed of the flow dividing pump so as to control the liquid flow of the first liquid outlet.
Furthermore, a liquid inlet of the three-way adapter is connected with an outlet of the chromatographic column.
Further, an inlet of the shunting pump is connected with the first liquid outlet, and an outlet of the shunting pump is connected with the evaporative light scattering detector.
Further, the second liquid outlet is connected with an ultraviolet-visible light detector.
The utility model also provides a liquid chromatograph, which comprises a chromatographic column, an evaporative light scattering detector, an ultraviolet visible light detector and the shunting device with adjustable shunting proportion; wherein the content of the first and second substances,
the chromatographic column is filled with a sample and is used for accessing mobile phase liquid;
the liquid inlet of the three-way adapter is connected with the outlet of the chromatographic column and is suitable for being connected into mobile phase liquid carrying sample components in the chromatographic column;
the inlet of the shunting pump is connected with the first liquid outlet, and the outlet of the shunting pump is connected with the evaporative light scattering detector;
the second liquid outlet is connected with the ultraviolet and visible light detector.
Further to add a mobile phase liquid to the chromatography column, the liquid chromatograph further comprises:
a solvent vessel storing a mobile phase liquid;
a transfer pump connected to the solvent container and the chromatography column respectively and adapted to pump the mobile phase liquid from the solvent container into the chromatography column.
Further, the liquid chromatograph further comprises a three-way valve, a waste liquid container and a component collecting container; wherein the content of the first and second substances,
an inlet of the three-way valve is connected with the ultraviolet-visible light detector so as to be connected into the mobile phase liquid carrying the sample components in the ultraviolet-visible light detector;
one outlet of the three-way valve is communicated with the waste liquid container;
the other outlet of the three-way valve is communicated with the component collecting container.
Further, for controlling the action of the three-way valve, the input end of the controller is respectively connected with the evaporative light scattering detector and the ultraviolet-visible light detector and is suitable for receiving sample response signals detected by the evaporative light scattering detector and the ultraviolet-visible light detector;
the controller is in control connection with the three-way valve and is suitable for controlling the switching action of the three-way valve according to the sample response signal.
After the technical scheme is adopted, when the rotating speed of the flow dividing pump is increased, the flow of the first liquid outlet is increased, and the flow of the corresponding second liquid outlet is reduced; on the contrary, when the rotating speed of the flow dividing pump is reduced, the flow of the first liquid outlet is reduced, and the flow of the corresponding second liquid outlet is increased; therefore, the flow dividing ratio of the first liquid outlet and the second liquid outlet can be continuously adjusted by controlling the rotating speed of the flow dividing pump, namely, the flow dividing ratio can be freely and continuously adjusted, and the flow dividing pump is automatically adjusted without manual operation, so that the introduction of human errors is avoided, the automation of the operation process is realized, and the use is convenient.
Specifically, the flow rate of the sample entering the evaporative light scattering detector can be adjusted by adjusting the flow splitting ratio of the first liquid outlet and the second liquid outlet, so that on one hand, too few samples split into the evaporative light scattering detector can be avoided, and the minimum requirement required by sensitivity can be met by the sample flow rate flowing into the evaporative light scattering detector; on the other hand, on the premise of meeting the sensitivity requirement of the evaporative light scattering detector, the sample shunted to the evaporative light scattering detector can be reduced as much as possible, so that the loss of the sample can be reduced, and the target product in the sample can be efficiently separated and collected.
Drawings
Fig. 1 is the structure diagram of the flow divider with adjustable flow dividing ratio and the liquid chromatograph using the same of the present invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.
Example one
As shown in fig. 1, a flow divider with adjustable flow dividing ratio comprises a three-way adapter 1, a flow dividing pump 2 and a controller 3; wherein the content of the first and second substances,
the three-way adapter 1 is provided with a liquid inlet 4 suitable for being connected with liquid, a first liquid outlet 5 which is communicated with the liquid inlet 4 and is suitable for discharging the liquid, and a second liquid outlet 6 which is communicated with the liquid inlet 4 and is suitable for discharging the liquid;
the diversion pump 2 is connected with the first liquid outlet 5 and is suitable for pumping the liquid flowing out of the first liquid outlet 5;
the controller 3 is in control connection with the diversion pump 2 and is suitable for controlling the rotating speed of the diversion pump 2 so as to control the liquid flow of the first liquid outlet 5; specifically, when the rotation speed of the split flow pump 2 is increased, the flow rate of the first liquid outlet 5 is increased, and the flow rate of the corresponding second liquid outlet 6 is decreased, whereas when the rotation speed of the split flow pump 2 is decreased, the flow rate of the first liquid outlet 5 is decreased, and the flow rate of the corresponding second liquid outlet 6 is increased; therefore, the flow dividing proportion of the first liquid outlet 5 and the second liquid outlet 6 can be continuously adjusted by controlling the rotating speed of the flow dividing pump 2, namely, the flow dividing proportion can be freely and continuously adjusted, and the flow dividing proportion is automatically adjusted without manual operation, so that the introduction of human errors is avoided, the automation of the operation process is realized, and the use is convenient. More specifically, the split ratio of the second liquid outlet 6 to the first liquid outlet 5 can be any ratio, and is generally 200:1, 100:1 and 20: 1. In this embodiment, the controller 3 may be, but is not limited to, a PLC control board, and the specific structure thereof is the prior art well known to those skilled in the art, and is not described in detail in this embodiment; the three-way adapter 1 can be a three-way joint, and the flow dividing pump 2 can be a metering pump.
As shown in fig. 1, the liquid inlet 4 of the three-way adapter 1 may be connected to an outlet of a chromatographic column 7, an inlet of the splitter pump 2 may be connected to the first liquid outlet 5, an outlet of the splitter pump 2 may be connected to an evaporative light scattering detector 8, and the second liquid outlet 6 may be connected to an ultraviolet-visible light detector 9; specifically, the specific structures of the chromatographic column 7, the evaporative light scattering detector 8 and the ultraviolet-visible light detector 9 are all well known in the art, and are not described in detail in this embodiment.
Example two
As shown in fig. 1, a liquid chromatograph includes a chromatographic column 7, an evaporative light scattering detector 8, an ultraviolet-visible light detector 9, and a split device with adjustable split ratio according to the first embodiment; wherein the content of the first and second substances,
the chromatographic column 7 is filled with a sample, and the chromatographic column 7 is used for accessing mobile phase liquid;
the liquid inlet 4 of the three-way adapter 1 is connected with the outlet of the chromatographic column 7 and is suitable for being connected with the mobile phase liquid carrying the sample components in the chromatographic column 7;
the inlet of the splitter pump 2 is connected with the first liquid outlet 5, and the outlet of the splitter pump 2 is connected with the evaporative light scattering detector 8;
the second liquid outlet 6 is connected with the ultraviolet and visible light detector 9; most of the mobile phase liquid carrying the sample components flows through the three-way adapter 1 and then enters the ultraviolet-visible light detector 9, and a small part of the mobile phase liquid is pumped to the evaporative light scattering detector 8 by the shunt pump 2.
Specifically, the controller 3 controls the rotation speed of the shunt pump 2, so that the shunt proportion of the three-way adapter 1 can be controlled, and the flow rate of the sample entering the evaporative light scattering detector 8 can be adjusted, on one hand, too few samples shunted to the evaporative light scattering detector 8 can be avoided, and the minimum requirement required by sensitivity can be met by the sample flow rate flowing into the evaporative light scattering detector 8; on the other hand, on the premise of meeting the sensitivity requirement of the evaporative light scattering detector 8, the sample shunted to the evaporative light scattering detector 8 can be reduced as much as possible, so that the loss of the sample can be reduced, and the target product in the sample can be efficiently separated and collected.
As shown in fig. 1, the liquid chromatograph may further include:
a solvent container 10 storing a mobile phase liquid;
a transfer pump 11 connected to the solvent container 10 and the chromatography column 7, respectively, and adapted to pump the mobile phase liquid in the solvent container 10 into the chromatography column 7; in particular, when the mobile phase liquid flows through the chromatography column 7, different components in the sample have different interactions with the stationary phase in the chromatography column 7, and thus the different components are eluted from the chromatography column 7 by the mobile phase liquid at different time points to form the mobile phase liquid carrying the sample components.
As shown in fig. 1, the liquid chromatograph may further include a three-way valve 12, a waste liquid container 13, and a component collection container 14; wherein the content of the first and second substances,
the inlet of the three-way valve 12 is connected with the ultraviolet-visible light detector 9 so as to access the mobile phase liquid carrying the sample components in the ultraviolet-visible light detector 9;
an outlet of the three-way valve 12 is communicated with the waste liquid container 13;
the other outlet of the three-way valve 12 is communicated with the component collecting container 14; specifically, the three-way valve 12 is used to control whether the mobile phase liquid carrying the sample component flows into the waste liquid container 13 or the component collection container 14; in this embodiment, the three-way valve 12 may be a solenoid valve.
As shown in fig. 1, the input end of the controller 3 is connected to the evaporative light scattering detector 8 and the ultraviolet-visible light detector 9 respectively, and is adapted to receive the sample response signals detected by the evaporative light scattering detector 8 and the ultraviolet-visible light detector 9;
the controller 3 is in control connection with the three-way valve 12 and is adapted to control the switching action of the three-way valve 12 in dependence of the sample response signal.
In particular, the split-flow device with adjustable split-flow proportion can also be used for split-flow control of other liquid chromatography detectors, such as but not limited to refractive index detectors, fluorescence detectors, and the like.
The working principle of the utility model is as follows:
when the rotating speed of the flow dividing pump 2 is increased, the flow rate of the first liquid outlet 5 is increased, and the flow rate of the corresponding second liquid outlet 6 is reduced; on the contrary, when the rotating speed of the splitter pump 2 is reduced, the flow rate of the first liquid outlet 5 is reduced, and the flow rate of the corresponding second liquid outlet 6 is increased; therefore, the flow dividing proportion of the first liquid outlet 5 and the second liquid outlet 6 can be continuously adjusted by controlling the rotating speed of the flow dividing pump 2, namely, the flow dividing proportion can be freely and continuously adjusted, and the flow dividing proportion is automatically adjusted without manual operation, so that the introduction of human errors is avoided, the automation of the operation process is realized, and the use is convenient.
Specifically, by adjusting the split ratio of the first liquid outlet 5 and the second liquid outlet 6, the flow rate of the sample entering the evaporative light scattering detector 8 can be adjusted, so that on one hand, too little sample split to the evaporative light scattering detector 8 can be avoided, and the minimum requirement required by sensitivity can be met by the sample flow rate flowing into the evaporative light scattering detector 8; on the other hand, on the premise of meeting the sensitivity requirement of the evaporative light scattering detector 8, the sample shunted to the evaporative light scattering detector 8 can be reduced as much as possible, so that the loss of the sample can be reduced, and the target product in the sample can be efficiently separated and collected.
The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the present disclosure, unless otherwise expressly stated or limited, the first feature may comprise both the first and second features directly contacting each other, and also may comprise the first and second features not being directly contacting each other but being in contact with each other by means of further features between them. Also, the first feature being above, on or above the second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the first feature is at a higher level than the second feature. A first feature that underlies, and underlies a second feature includes a first feature that is directly under and obliquely under a second feature, or simply means that the first feature is at a lesser level than the second feature.
Claims (8)
1. The flow dividing device with the adjustable flow dividing proportion is characterized by comprising a three-way adapter (1), a flow dividing pump (2) and a controller (3); wherein the content of the first and second substances,
the three-way adapter (1) is provided with a liquid inlet (4) suitable for being connected with liquid, a first liquid outlet (5) communicated with the liquid inlet (4) and suitable for discharging the liquid, and a second liquid outlet (6) communicated with the liquid inlet (4) and suitable for discharging the liquid;
the flow dividing pump (2) is connected with the first liquid outlet (5) and is suitable for pumping the liquid flowing out of the first liquid outlet (5);
the controller (3) is in control connection with the flow dividing pump (2) and is suitable for controlling the rotating speed of the flow dividing pump (2) so as to control the liquid flow of the first liquid outlet (5).
2. The split-ratio adjustable split-flow device according to claim 1, wherein the liquid inlet (4) of the three-way adapter (1) is connected with the outlet of the chromatographic column (7).
3. The adjustable splitting ratio splitting device according to claim 1, wherein an inlet of the splitting pump (2) is connected to the first liquid outlet (5), and an outlet of the splitting pump (2) is connected to the evaporative light scattering detector (8).
4. The split ratio adjustable split device according to claim 1, wherein the second liquid outlet (6) is connected to a uv-vis detector (9).
5. A liquid chromatograph, characterized in that it comprises a chromatographic column (7), an evaporative light scattering detector (8), an ultraviolet-visible light detector (9) and a split device with adjustable split ratio according to any one of claims 1 to 4; wherein the content of the first and second substances,
the chromatographic column (7) is filled with a sample, and the chromatographic column (7) is used for accessing mobile phase liquid;
the liquid inlet (4) of the three-way adapter (1) is connected with the outlet of the chromatographic column (7) and is suitable for being connected into the mobile phase liquid carrying the sample components in the chromatographic column (7);
the inlet of the shunting pump (2) is connected with the first liquid outlet (5), and the outlet of the shunting pump (2) is connected with the evaporative light scattering detector (8);
the second liquid outlet (6) is connected with the ultraviolet and visible light detector (9).
6. The liquid chromatograph of claim 5, further comprising:
a solvent container (10) storing a mobile phase liquid;
a transfer pump (11) connected to the solvent container (10) and the chromatography column (7) respectively and adapted to pump mobile phase liquid from the solvent container (10) into the chromatography column (7).
7. The liquid chromatograph according to claim 5, characterized in that it further comprises a three-way valve (12), a waste liquid container (13) and a component collection container (14); wherein the content of the first and second substances,
the inlet of the three-way valve (12) is connected with the ultraviolet-visible light detector (9) so as to be connected into the mobile phase liquid carrying the sample components in the ultraviolet-visible light detector (9);
an outlet of the three-way valve (12) is communicated with the waste liquid container (13);
the other outlet of the three-way valve (12) is communicated with the component collecting container (14).
8. Liquid chromatograph according to claim 7, characterized in that said controller (3) has inputs connected to said evaporative light scattering detector (8) and to said ultraviolet-visible light detector (9), respectively, and is adapted to receive sample response signals detected by said evaporative light scattering detector (8) and by said ultraviolet-visible light detector (9);
the controller (3) is in control connection with the three-way valve (12) and is adapted to control the switching action of the three-way valve (12) in dependence on the sample response signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023284770.3U CN214252164U (en) | 2020-12-30 | 2020-12-30 | Shunting device with adjustable shunting proportion and liquid chromatograph using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023284770.3U CN214252164U (en) | 2020-12-30 | 2020-12-30 | Shunting device with adjustable shunting proportion and liquid chromatograph using same |
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| CN214252164U true CN214252164U (en) | 2021-09-21 |
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| CN202023284770.3U Active CN214252164U (en) | 2020-12-30 | 2020-12-30 | Shunting device with adjustable shunting proportion and liquid chromatograph using same |
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