CN116242688A - Quick dilution device for online analysis - Google Patents
Quick dilution device for online analysis Download PDFInfo
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- CN116242688A CN116242688A CN202310129819.7A CN202310129819A CN116242688A CN 116242688 A CN116242688 A CN 116242688A CN 202310129819 A CN202310129819 A CN 202310129819A CN 116242688 A CN116242688 A CN 116242688A
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- electromagnetic valve
- way electromagnetic
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- dilution
- diluent
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- 238000010790 dilution Methods 0.000 title claims abstract description 58
- 239000012895 dilution Substances 0.000 title claims abstract description 58
- 239000003085 diluting agent Substances 0.000 claims abstract description 37
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 230000002572 peristaltic effect Effects 0.000 claims description 42
- 239000007788 liquid Substances 0.000 claims description 37
- 239000002699 waste material Substances 0.000 claims description 23
- 238000011084 recovery Methods 0.000 claims description 17
- 238000011002 quantification Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 3
- 238000007865 diluting Methods 0.000 description 3
- 238000003760 magnetic stirring Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/38—Diluting, dispersing or mixing samples
- G01N2001/386—Other diluting or mixing processes
- G01N2001/387—Other diluting or mixing processes mixing by blowing a gas, bubbling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Automatic Analysis And Handling Materials Therefor (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a rapid dilution device for online analysis, which comprises a three-way electromagnetic valve group, a dilution tank, a sample injection pipeline, a diluent pipeline and an air inlet pipeline, wherein the three-way electromagnetic valve group is arranged on the dilution tank; the three-way electromagnetic valve group comprises a first three-way electromagnetic valve, a second three-way electromagnetic valve and a third three-way electromagnetic valve; the common end of the first three-way electromagnetic valve is connected with the common end of the second three-way electromagnetic valve through a first quantitative pipe, and the normally open end of the second three-way electromagnetic valve is connected with the common end of the third three-way electromagnetic valve through a second quantitative pipe; the sample injection pipeline is connected with the normally closed end of the second three-way electromagnetic valve; the diluent pipeline is connected with the normally closed end of the third three-way electromagnetic valve; the air inlet pipeline is connected with the normally open end of the third three-way electromagnetic valve; the dilution tank is connected with the normally open end of the first three-way electromagnetic valve through a third metering tube. The dilution device provided by the invention has the advantages of controllable dilution ratio and high quantitative accuracy.
Description
Technical Field
The invention belongs to the technical field of online analysis, and particularly relates to a rapid dilution device for online analysis.
Background
In the prior art, an online analyzer has a certain detection range, and when the concentration of a substance to be detected exceeds the upper detection limit of the analyzer, a sample needs to be diluted, and the concentration of the sample is diluted to be within the detection range of the online analyzer and then detected.
Dilution operations often introduce systematic errors, requiring accurate quantification of both sample and diluent volumes as much as possible during dilution in order to obtain accurate test data. The dilution process of the on-line analyzers on the market is usually quantified in three ways: firstly, a peristaltic pump is used for quantifying, a sample and a diluent with certain proportion volumes are respectively added into a dilution tank according to the flow rate and the running time of a peristaltic pump for pumping liquid, and then the mixture is stirred uniformly. Since the pump tube deforms with the use time, the ratio of the sample to the diluent is changed in a longer term, so that the dilution accuracy is gradually deteriorated, and the peristaltic pump is required to be calibrated frequently for ensuring the dilution effect, and the operation and maintenance are complex. Secondly, the quantitative of the injection pump is more accurate and stable than that of the peristaltic pump, but the operation speed is low, the problem that the dilution accuracy is poor due to abrasion and air leakage of the piston of the injector is caused under long-term use, and in addition, the cost of the injection pump is often higher. And thirdly, the peristaltic pump is matched with the photoelectric sensor for quantification, the peristaltic pump is only used as a driving device for liquid flow, and the quantification is completed by the photoelectric sensor fixed at a specific position in a liquid flow path. The quantitative accuracy of the mode is higher, but the unit structure is relatively complex, the running speed is low, and for samples with higher chromaticity or turbidity, the photoelectric sensor can not identify or misjudge the liquid level, so that the reliability is lower for complex application scenes.
Based on the method, the rapid dilution device for online analysis is provided, and the three-way electromagnetic valve and the quantitative tube are adopted to dilute the sample, so that the interference factors are few, and the quantitative accuracy is realized.
Disclosure of Invention
The invention aims to provide a rapid dilution device for online analysis, which solves the technical problem that the conventional dilution device is used for quantifying by means of a peristaltic pump, and the dilution ratio accuracy is gradually deteriorated after long-time use.
The aim of the invention is realized by the following technical scheme:
a rapid dilution device for on-line analysis comprises a three-way electromagnetic valve group, a dilution tank, a sample injection pipeline, a diluent pipeline and an air inlet pipeline;
the three-way electromagnetic valve group comprises a first three-way electromagnetic valve, a second three-way electromagnetic valve and a third three-way electromagnetic valve; the common end of the first three-way electromagnetic valve is connected with the common end of the second three-way electromagnetic valve through a first quantitative pipe, and the normally open end of the second three-way electromagnetic valve is connected with the common end of the third three-way electromagnetic valve through a second quantitative pipe;
the sample injection pipeline is connected with the normally closed end of the second three-way electromagnetic valve; the diluent pipeline is connected with the normally closed end of the third three-way electromagnetic valve; the air inlet pipeline is connected with the normally open end of the third three-way electromagnetic valve; the dilution tank is connected with the normally open end of the first three-way electromagnetic valve through a third metering tube.
The invention may be modified in that the third metering tube is provided with a bubble sensor. The bubble sensor is matched with the air inlet pipeline and the diluent pipeline to push liquid, so that the quantitative accuracy is improved.
The invention can be further improved and further comprises a first waste liquid recovery pipeline which is connected with the dilution tank.
Further, the device also comprises a second waste liquid recovery pipeline, and the second waste liquid recovery pipeline is connected with the normally closed end of the first three-way electromagnetic valve.
In the invention, the sample injection pipeline is provided with a peristaltic pump, the diluent pipeline is provided with a peristaltic pump, and the air inlet pipeline is provided with a peristaltic pump.
Compared with the prior art, the invention has the following beneficial effects:
(1) The rapid dilution device for on-line analysis adopts the three-way electromagnetic valve and the quantitative tube for dilution, has simple structure, replaces peristaltic pump quantification in the prior art, has controllable dilution proportion, completely depends on the selection of the quantitative tube, does not depend on a sensor, and has high accuracy.
(2) The peristaltic pump is used for driving the liquid to flow, the bubble sensor (photoelectric sensor) is used for judging the liquid position, the peristaltic pump can drive the liquid to flow at a higher running speed, the quantification and the transfer of the sample and the diluent are rapidly and efficiently completed, and the peristaltic pump does not participate in the quantification and only drives the liquid to flow, so that the quantification precision is not influenced by the flow change of the pump pipe, and the device is stable for a long time.
(3) The dilution ratio of the invention depends on the choice of the metering tube, and the metering tube has various volume specifications which can be selected, so that the dilution ratio can be adjusted by replacing the metering tube with a different volume.
Drawings
FIG. 1 is a schematic diagram of the rapid dilution apparatus for on-line analysis of the present invention;
the reference numerals are as follows: 1-a first three-way electromagnetic valve, 2-a second three-way electromagnetic valve, 3-a third three-way electromagnetic valve, 4-a first quantitative pipe, 5-a second quantitative pipe, 6-a third quantitative pipe, 7-a sample injection pipeline, 8-a diluent pipeline, 9-an air inlet pipeline, 10-first peristaltic pump, 11-second peristaltic pump, 12-third peristaltic pump, 13-fourth peristaltic pump, 14-first waste liquid recovery pipeline, 15-second waste liquid recovery pipeline, 16-dilution tank, 17-bubble sensor, 18-waste liquid collecting vessel.
Detailed Description
The present invention is further described below in conjunction with specific embodiments to facilitate a better understanding and practice of the present invention.
Examples
The rapid dilution device for on-line analysis shown in fig. 1 comprises a three-way electromagnetic valve group, a dilution tank 16, a sample injection pipeline 7, a diluent pipeline 8 and an air inlet pipeline 9.
The three-way electromagnetic valve group comprises a first three-way electromagnetic valve 1, a second three-way electromagnetic valve 2 and a third three-way electromagnetic valve 3; the common end of the first three-way electromagnetic valve 1 is connected with the common end of the second three-way electromagnetic valve 2 through a first metering tube 4, and the normal open end of the second three-way electromagnetic valve 2 is connected with the common end of the third three-way electromagnetic valve 3 through a second metering tube 5.
The sample injection pipeline 7 is provided with a first peristaltic pump 10, one end of the sample injection pipeline 7 is connected with the sample, the other end of the sample injection pipeline 7 is connected with the normally closed end of the second three-way electromagnetic valve 2, and the sample can be conveyed to the three-way electromagnetic valve group when the first peristaltic pump 10 runs anticlockwise; the diluent pipeline 8 is provided with a second peristaltic pump 11, one end of the diluent pipeline 8 is connected with the diluent, the other end of the diluent pipeline 8 is connected with the normally closed end of the third three-way electromagnetic valve 3, and the diluent can be conveyed to the three-way electromagnetic valve group when the second peristaltic pump 11 runs anticlockwise; the air inlet pipeline 9 is provided with a third peristaltic pump 12, one end of the air inlet pipeline 9 is communicated with air, the other end of the air inlet pipeline is connected with the normally open end of the third three-way electromagnetic valve 3, and when the third peristaltic pump 12 runs anticlockwise, the air can be conveyed to the three-way electromagnetic valve group; the diluting tank 16 is provided with magnetic stirring, different liquids can be mixed evenly fast, the diluting tank is connected with the normally open end of the first three-way electromagnetic valve 1 through the third quantitative pipe 6, and the third quantitative pipe 6 is provided with a bubble sensor 17. The bubble sensor 17 is matched with the diluent pipeline 8 and the air inlet pipeline 9 to push liquid, so that the quantitative accuracy is improved. In the invention, the pipe diameters and the pipe lengths of the first metering pipe 4, the second metering pipe 5 and the third metering pipe 6 are determined according to the required quantitative volume, and the pipe diameters and the pipe lengths of all other pipes are variable within a certain range. Furthermore, the metering volume of the diluent which is to be determined is actually made up of two parts, a second metering tube 5 and a third metering tube 6, the first metering tube 4 being used for metering the sample. The internal volume ratio of the "second metering tube 5+third metering tube 6" and the "first metering tube 4" is the quantitative ratio of the diluent and the sample, i.e., the dilution ratio.
The rapid dilution device for on-line analysis of the present embodiment further includes a first waste liquid recovery line 14 and a second waste liquid recovery line 15. The first waste liquid recovery pipeline 14 is provided with a fourth peristaltic pump 13, one end of the first waste liquid recovery pipeline 14 is connected with the dilution tank 16, the other end of the first waste liquid recovery pipeline is connected with the waste liquid collecting barrel 18, and when the fourth peristaltic pump 13 runs clockwise, liquid in the dilution tank 16 can be emptied and conveyed into the waste liquid collecting barrel 18. One end of the second waste liquid recovery pipeline 15 is connected with the normally closed end of the first three-way electromagnetic valve 1, and the other end is connected with the waste liquid collecting barrel 18.
The method for diluting the sample by the rapid dilution device for online analysis comprises the following steps:
a. cleaning the pipeline and quantifying the diluent: the third three-way electromagnetic valve 3 is opened, the second peristaltic pump 11 rotates anticlockwise for a certain time (for example, 10 seconds), and the diluent sequentially passes through the diluent pipeline 8, the second peristaltic pump 11, the normally closed end of the third three-way electromagnetic valve 3, the common end of the third three-way electromagnetic valve 3, the second metering tube 5, the normally open end of the second three-way electromagnetic valve 2, the common end of the second three-way electromagnetic valve 2, the first metering tube 4, the common end of the first three-way electromagnetic valve 1, the normally open end of the first three-way electromagnetic valve 1 and the third metering tube 6, and enters the dilution tank 16. The liquid originally present in the above-mentioned pipeline is pushed into the dilution tank 16 by the diluent, and at the same time, the pipeline comprises a second metering tube 5 and a third metering tube 6, which are filled with the diluent, i.e. the diluent is metered at the same time. The third three-way solenoid valve 3 is then closed.
b. Emptying dilution tank 16: the fourth peristaltic pump 13 rotates clockwise for a certain time (e.g. 15 seconds), and the liquid in the dilution tank 16 passes through the first waste liquid recovery pipeline 14 and the fourth peristaltic pump 13 in sequence and enters the waste liquid collecting barrel 18. This step may also begin in synchronization with the previous step, but may end a few seconds later than the previous step to completely empty the dilution tank 16.
c. Quantitative samples: the first three-way electromagnetic valve 1 and the second three-way electromagnetic valve 2 are opened, the first peristaltic pump 10 rotates anticlockwise for a certain time (for example, 10 seconds), and a sample sequentially passes through the sample inlet pipeline 7, the first peristaltic pump 10, the normally closed end of the second three-way electromagnetic valve 2, the common end of the second three-way electromagnetic valve 2, the first metering tube 4, the common end of the first three-way electromagnetic valve 1, the normally closed end of the first three-way electromagnetic valve 1 and the second waste liquid recovery pipeline 15 and enters the waste liquid collecting barrel 18. The first three-way solenoid valve 1 and the second three-way solenoid valve 2 are then closed. At this point, the desired quantitative volume of sample has remained in the first metering tube 4.
e. Mixing evenly: two modes are optional.
In the first mode, the third peristaltic pump 12 rotates anticlockwise for a certain time (for example, 15 seconds), and air sequentially passes through the air inlet pipeline 9, the third peristaltic pump 12, the normal start end of the third three-way electromagnetic valve 3, the common end of the third three-way electromagnetic valve 3, the second metering pipe 5, the normal start end of the second three-way electromagnetic valve 2, the common end of the second three-way electromagnetic valve 2, the first metering pipe 4, the common end of the first three-way electromagnetic valve 1, the normal start end of the first three-way electromagnetic valve 1 and the third metering pipe 6, and enters the dilution tank 16. The sample present in the first metering tube 4 and the diluent present in the second metering tube 5 and the third metering tube 6 are both pushed into the dilution tank 16 by air and then stirred uniformly in the dilution tank 16 by electromagnetic stirring.
In the second mode, the third peristaltic pump 12 rotates anticlockwise for a certain time (for example, 2 seconds), air passes through the air inlet pipeline 9, the third peristaltic pump 12, the normal open end of the third three-way electromagnetic valve 3 and the common end of the third three-way electromagnetic valve 3 in sequence, at this time, a small section of air enters the second metering tube 5, and the diluent in the second metering tube 5 and the third metering tube 6, and the sample in the first metering tube 4 are pushed to the direction of the dilution pool 16 for a small distance. The third three-way solenoid valve 3 is then opened and the second peristaltic pump 11 is rotated counter-clockwise, while the bubble sensor 17 starts to monitor whether an air segment is present in the end of the third metering tube 6. The diluent sequentially passes through the diluent pipeline 8, the second peristaltic pump 11, the normally closed end of the third three-way electromagnetic valve 3, the common end of the third three-way electromagnetic valve 3, the second metering tube 5, the normally open end of the second three-way electromagnetic valve 2, the common end of the second three-way electromagnetic valve 2, the first metering tube 4, the common end of the first three-way electromagnetic valve 1, the normally open end of the first three-way electromagnetic valve 1 and the third metering tube 6, so that the diluent in the second metering tube 5 and the third metering tube 6, the sample in the first metering tube 4 and a small section of air brought by the previous action are pushed to the direction of the dilution tank 16. When the bubble sensor 17 detects the continued presence of an air segment at the end of the third metering tube 6 (for example for 1 second), the second peristaltic pump 11 is stopped. At this time, the diluents in the second metering tube 5 and the third metering tube 6 and the samples in the first metering tube 4 have all entered the dilution tank 16, and are then stirred uniformly under the action of magnetic stirring. Finally, the third three-way electromagnetic valve 3 is closed.
The first mode is pure air pushing, and the second mode is combined pushing of an air section and a diluent. The dilution accuracy is higher because the second mode drives the sample and diluent into the dilution tank 16 with a small air segment, rather than the first mode with a large air segment, with less tubing residue.
The foregoing examples illustrate the various embodiments of the present invention in detail, but the embodiments of the present invention are not limited thereto, and those skilled in the art can realize the objects of the present invention based on the disclosure of the present invention, and any modifications and variations based on the concept of the present invention fall within the scope of the present invention, which is defined in the claims.
Claims (5)
1. The rapid dilution device for on-line analysis is characterized by comprising a three-way electromagnetic valve group, a dilution tank (16), a sample injection pipeline (7), a diluent pipeline (8) and an air inlet pipeline (9);
the three-way electromagnetic valve group comprises a first three-way electromagnetic valve (1), a second three-way electromagnetic valve (2) and a third three-way electromagnetic valve (3); the common end of the first three-way electromagnetic valve (1) is connected with the common end of the second three-way electromagnetic valve (2) through a first metering tube (4), and the normally open end of the second three-way electromagnetic valve (2) is connected with the common end of the third three-way electromagnetic valve (3) through a second metering tube (5);
the sample injection pipeline (7) is connected with the normally closed end of the second three-way electromagnetic valve (2); the diluent pipeline (8) is connected with the normally closed end of the third three-way electromagnetic valve (3); the air inlet pipeline (9) is connected with the normally open end of the third three-way electromagnetic valve (3); the dilution tank (16) is connected with the normally open end of the first three-way electromagnetic valve (1) through a third metering tube (6).
2. Rapid dilution device for on-line analysis according to claim 1, characterized in that the third metering tube (6) is provided with a bubble sensor (17).
3. Rapid dilution device for on-line analysis according to claim 1 or 2, further comprising a first waste liquid recovery line (14), the first waste liquid recovery line (14) being connected to the dilution tank (16).
4. A rapid dilution apparatus for on-line analysis according to claim 3, further comprising a second waste liquid recovery line (15), the second waste liquid recovery line (15) being connected to the normally closed end of the first three-way solenoid valve (1).
5. The rapid dilution apparatus for online analysis according to claim 4, wherein the sample introduction conduit (7) is provided with a peristaltic pump, the diluent conduit (8) is provided with a peristaltic pump, and the air intake conduit (9) is provided with a peristaltic pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310129819.7A CN116242688A (en) | 2023-02-16 | 2023-02-16 | Quick dilution device for online analysis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310129819.7A CN116242688A (en) | 2023-02-16 | 2023-02-16 | Quick dilution device for online analysis |
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| Publication Number | Publication Date |
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| CN116242688A true CN116242688A (en) | 2023-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310129819.7A Pending CN116242688A (en) | 2023-02-16 | 2023-02-16 | Quick dilution device for online analysis |
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| CN201364291Y (en) * | 2008-12-18 | 2009-12-16 | 杭州鼎利环保科技有限公司 | On-line constant-volume diluter |
| CN102607932A (en) * | 2012-03-12 | 2012-07-25 | 同济大学 | Underwater in-situ sample introduction diluter |
| CN103398894A (en) * | 2013-06-17 | 2013-11-20 | 孙卫国 | Dilution device able to adjust ratio and dilution method |
| JP2015028452A (en) * | 2013-07-30 | 2015-02-12 | ジーエルサイエンス株式会社 | Sample introduction method and sample introduction device |
| CN105716933A (en) * | 2016-01-29 | 2016-06-29 | 南京捷发科技有限公司 | Device and method for achieving constant-volume proportional dilution |
| CN208366698U (en) * | 2018-07-09 | 2019-01-11 | 中国核动力研究设计院 | A kind of sample dilution device for core sampling system |
| CN111856054A (en) * | 2020-06-24 | 2020-10-30 | 江苏德林环保技术有限公司 | Multistage quantitative ring quantitative system |
| CN115266293A (en) * | 2022-08-03 | 2022-11-01 | 江苏莱蒙仪器科技有限公司 | Automatic online trace sample dilution mixing system and method |
-
2023
- 2023-02-16 CN CN202310129819.7A patent/CN116242688A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61260165A (en) * | 1985-05-15 | 1986-11-18 | Toshiba Corp | Sampling monitor for automatic chemical analyzer |
| US5744099A (en) * | 1995-09-15 | 1998-04-28 | Cytek Development Inc. | Apparatus for transfer of biological fluids |
| JP2009162536A (en) * | 2007-12-28 | 2009-07-23 | Yaskawa Electric Corp | Liquid sample dispenser and driving method |
| CN201364291Y (en) * | 2008-12-18 | 2009-12-16 | 杭州鼎利环保科技有限公司 | On-line constant-volume diluter |
| CN102607932A (en) * | 2012-03-12 | 2012-07-25 | 同济大学 | Underwater in-situ sample introduction diluter |
| CN103398894A (en) * | 2013-06-17 | 2013-11-20 | 孙卫国 | Dilution device able to adjust ratio and dilution method |
| JP2015028452A (en) * | 2013-07-30 | 2015-02-12 | ジーエルサイエンス株式会社 | Sample introduction method and sample introduction device |
| CN105716933A (en) * | 2016-01-29 | 2016-06-29 | 南京捷发科技有限公司 | Device and method for achieving constant-volume proportional dilution |
| CN208366698U (en) * | 2018-07-09 | 2019-01-11 | 中国核动力研究设计院 | A kind of sample dilution device for core sampling system |
| CN111856054A (en) * | 2020-06-24 | 2020-10-30 | 江苏德林环保技术有限公司 | Multistage quantitative ring quantitative system |
| CN115266293A (en) * | 2022-08-03 | 2022-11-01 | 江苏莱蒙仪器科技有限公司 | Automatic online trace sample dilution mixing system and method |
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