CN113624905B - Online ion chromatograph automatic cleaning online measurement calibration sample injector - Google Patents
Online ion chromatograph automatic cleaning online measurement calibration sample injector Download PDFInfo
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- CN113624905B CN113624905B CN202110058314.7A CN202110058314A CN113624905B CN 113624905 B CN113624905 B CN 113624905B CN 202110058314 A CN202110058314 A CN 202110058314A CN 113624905 B CN113624905 B CN 113624905B
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- 238000005259 measurement Methods 0.000 title claims abstract description 21
- 238000004140 cleaning Methods 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 248
- 238000002347 injection Methods 0.000 claims abstract description 60
- 239000007924 injection Substances 0.000 claims abstract description 60
- 238000004255 ion exchange chromatography Methods 0.000 claims abstract description 17
- 239000002699 waste material Substances 0.000 claims abstract description 14
- 229910021642 ultra pure water Inorganic materials 0.000 claims abstract description 3
- 239000012498 ultrapure water Substances 0.000 claims abstract description 3
- 239000000523 sample Substances 0.000 claims description 90
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 239000012452 mother liquor Substances 0.000 claims description 22
- 238000004458 analytical method Methods 0.000 claims description 9
- 238000010790 dilution Methods 0.000 claims description 9
- 239000012895 dilution Substances 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 7
- 239000012470 diluted sample Substances 0.000 claims description 6
- 238000005070 sampling Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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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
- G01N30/96—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 using ion-exchange
-
- 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
-
- 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
- G01N30/16—Injection
- G01N30/20—Injection using a sampling valve
-
- 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
- G01N2030/042—Standards
-
- 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
- G01N30/16—Injection
- G01N30/20—Injection using a sampling valve
- G01N2030/201—Injection using a sampling valve multiport valves, i.e. having more than two ports
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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 relates to an online ion chromatography automatic cleaning online measurement calibration sample injector, wherein a syringe pump is connected with a six-way valve through a liquid storage ring, carrier liquid is communicated with the syringe pump, the carrier liquid is ultrapure water, a first port is communicated with a liquid mixing chamber, the first port is communicated with an upper port of the liquid mixing chamber through an exhaust valve, the other end of the exhaust valve is communicated with air, a liquid mixing valve is communicated with the liquid mixing chamber, the liquid mixing valve is also connected with a third port, one end of the liquid mixing valve is connected with a waste liquid collecting device, the fourth port is connected with a sample injection end, a fifth port is connected with high-concentration standard liquid mother liquid through a pipeline, the sixth port is connected with a liquid inlet valve, one end of the liquid inlet valve is connected with the waste liquid collecting device, the other end of the liquid inlet valve is connected with a precision filter, and the liquid is injected into ion chromatography after passing through the precision filter. The invention not only can realize on-line sampling and on-line calibration, but also can realize automatic cleaning, and can realize automatic calibration function by remotely controlling the high-concentration standard liquid mother liquid to be automatically diluted into the standard liquid with the calibrated concentration.
Description
Technical Field
The invention relates to the technical field of analytical instruments, in particular to an online ion chromatography automatic cleaning online measurement calibration sample injector.
Background
The ion chromatograph belongs to a pure analysis unit, and an analysis water sample is injected into the ion chromatograph by peripheral equipment or manual work, so that the ion chromatograph can analyze the sample. The ion chromatograph sample injector is only a disk sample injector, namely, a standard sample or an online water sample is required to be manually placed into a sample bottle of the sample injector, the water samples in the sample bottle are extracted one by one in a mechanical arm sampling mode, and then the water samples are injected into the ion chromatograph for analysis.
The existing ion chromatographic sample injector belongs to laboratory products and is not suitable for online measurement. The on-line sampling is not possible: because the sample can be sampled only by manually putting the water sample into the sampling bottle, the sample injector can not realize online continuous sample injection. The method can not be used for online calibration: the calibration needs 5-6 standard liquids with different concentrations of high, medium and low, and the low concentration standard liquid can not be stored for a long time and needs manual replacement in a short time, so the sample injector can not realize on-line calibration. Cannot be automatically cleaned: the sample injector needs to manually clean the sampling bottle, so that automatic cleaning cannot be realized.
Disclosure of Invention
The invention aims to provide an online ion chromatography automatic cleaning online measurement calibration sample injector so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the utility model provides an online ion chromatography self-cleaning on-line measurement calibration sampler, includes syringe pump, six-way valve, feed liquor valve, high concentration mark liquid mother liquor, mixes liquid valve, mixes liquid chamber and discharge valve, the syringe pump passes through the liquid storage ring and is connected with six-way valve, communicate the carrier fluid on the syringe pump, six-way valve includes first mouth, second mouth, third mouth, fourth mouth, fifth mouth and sixth mouth, first mouth and mixed liquid chamber intercommunication, first mouth passes through discharge valve and mixes liquid chamber upper mouth intercommunication, the discharge valve other end and air intercommunication, mix liquid valve and mixed liquid chamber intercommunication, mixed liquid valve still is connected with third mouth, mix liquid valve is kept away from the one end of mixed liquid chamber and is connected waste liquid collection device, the sample introduction end is connected to the fourth mouth, fifth mouth and high concentration mark liquid mother liquor pass through the pipeline connection, sixth mouth and feed liquor valve, the one end and the other end and the mixed liquid chamber of feed liquor valve are connected to the other end and the collection device, the accurate filter after the accurate injection chromatography is gone into in the accurate filter.
Preferably, when the low-concentration on-line measurement is performed, the on-line sample enters the liquid storage ring through a fourth port of the six-way valve and is reversely pushed by the injection pump, a water sample in the liquid storage ring is pumped out through a sixth port of the six-way valve, is injected into the ion chromatograph for analysis through a normally closed port of the liquid inlet valve, and the redundant sample is discharged through a normally open port of the liquid inlet valve.
Preferably, when high-concentration online measurement is performed, if the concentration of a water sample to be measured is too high, an automatic dilution flow is started, the water sample is pumped by a syringe pump, online samples enter a liquid storage ring through a fourth port of a six-way valve, the syringe pump is reversely pushed, the water sample in the liquid storage ring is pumped out through the third port of the six-way valve, the water sample enters a liquid storage ring through the liquid mixing valve, the carrier liquid is reversely pushed by the syringe pump, the carrier liquid in the liquid storage ring is pumped out through the third port of the six-way valve, the carrier liquid enters the liquid mixing chamber through the liquid mixing valve, mixed dilution is performed with the online samples, the syringe pump flow is controlled, the online samples and the carrier liquid are controlled, the sample injection amount reaches to be up to 1000 times or less, the diluted samples enter the liquid storage ring through the third port of the six-way valve, the syringe pump is reversely pushed, the water sample in the liquid storage ring is pumped out through the sixth port of the six-way valve, the carrier liquid enters the liquid sample in the liquid storage ring through the port of the liquid inlet valve, the normally-closed ion chromatograph is subjected to analysis, and the sample in the liquid storage ring is discharged through the normally-open port of the liquid sample inlet valve.
Preferably, when the standard is needed, the high-concentration standard liquid mother liquor is pumped by the injection pump, the standard liquid mother liquor enters the liquid storage ring through the fifth port of the six-way valve, the injection pump is pushed back, the standard liquid mother liquor in the liquid storage ring is pumped out through the third port of the six-way valve, enters the liquid mixing chamber through the liquid mixing valve, is pumped by the injection pump, the carrier liquid enters the liquid storage ring through the third port of the six-way valve, the injection pump is pushed back, the carrier liquid in the liquid storage ring is pumped out through the third port of the six-way valve, enters the liquid mixing chamber through the liquid mixing valve, is mixed and diluted with the standard liquid mother liquor, and the stroke of the injection pump is controlled, the sample injection amount of the standard liquid mother liquor and the carrier liquid is controlled to achieve the stepless concentration dilution within 1000 times, then the standard liquid with different concentrations is diluted into any part, standard liquids with different concentrations are prepared according to the requirement, diluted samples are pumped by an injection pump to enter a liquid storage ring through a third port of a six-way valve, the injection pump pushes back, a water sample in the liquid storage ring is injected out through a sixth port of the six-way valve, the water sample is injected into ion chromatograph for analysis through a normally closed port of the liquid inlet valve, redundant standard liquids are discharged through a normally open port of the liquid inlet valve, the process is repeated for fixed times, and the calibration is completed.
Preferably, when the sample injection pipeline needs to be cleaned, the carrier liquid is pumped into the liquid storage ring through the injection pump, and the ion chromatography sample injection pipe is cleaned through a sixth port of the six-way valve.
Preferably, when the liquid mixing chamber needs to be cleaned, the carrier liquid is pumped into the liquid storage ring through the injection pump, the liquid mixing chamber is cleaned through the third port of the six-way valve, after cleaning, the extracted air enters the liquid storage ring, the air is pumped into the liquid mixing chamber through the first port of the six-way valve, the waste liquid in the liquid mixing chamber is discharged through the liquid mixing valve, the waste liquid is directly discharged through the independent waste discharge port, and no more back-pumping pollutes the liquid storage ring and the sample injection pipeline.
Compared with the prior art, the invention has the beneficial effects that:
1. the high-concentration mother liquor can be stored for a long time.
2. The high-concentration standard liquid mother liquid is automatically diluted into the standard liquid with the calibrated concentration by remote control, so that the automatic calibration function is realized. Freeing up the labor, generally, the labor needs to make a calibration once in 6 hours, and the calibration needs to be made once in each month.
3. The liquid mixing chamber independently discharges waste liquid, and does not suck back a pollution sample injection pipeline.
4. The device can be independently used as a device, can be integrated in a large-scale device and can continuously supply liquid for ion chromatography.
5. The ion chromatograph detector of the laboratory instrument can be applied to the on-line measurement occasion through the device.
Drawings
FIG. 1 is a schematic diagram of an on-line ion chromatograph automatic cleaning on-line measurement calibration injector according to the present invention.
In the figure: 1. a syringe pump; 2. a six-way valve; 3. a liquid inlet valve; 4. high-concentration standard liquid mother liquor; 5. a liquid mixing valve; 6. a liquid mixing chamber; 7. an exhaust valve; 8. a liquid storage ring; 9. a first port; 10. a second port; 11. a third port; 12. a fourth port; 13. a fifth port; 14. a sixth port; 15. a precision filter.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, in the embodiment of the invention, an online ion chromatography automatic cleaning online measurement calibration sample injector comprises a syringe pump 1, a six-way valve 2, a liquid inlet valve 3, a high-concentration standard liquid mother liquid 4, a liquid mixing valve 5, a liquid mixing chamber 6 and an exhaust valve 7, wherein the syringe pump 1 is connected with the six-way valve 2 through a liquid storage ring 8, a carrier liquid is communicated with the syringe pump 1, the six-way valve 2 comprises a first port 9, a second port 10, a third port 11, a fourth port 12, a fifth port 13 and a sixth port 14, the first port 9 is communicated with the upper port of the liquid mixing chamber 6 through the exhaust valve 7, the other end of the exhaust valve 7 is communicated with air, the liquid mixing valve 5 is communicated with the liquid mixing chamber 6, the liquid mixing valve 5 is also connected with the third port 11, one end of the liquid mixing valve 5, which is far away from the liquid mixing chamber 6, is connected with a collecting device, the fourth port 12 is connected with a port, the fifth port 13 is connected with a precision filter, the other end of the liquid mixing valve is connected with the liquid inlet 3 through the high-concentration standard liquid mother liquid 3 through the high-concentration standard liquid inlet valve 15, and the other end of the liquid inlet valve is connected with the precise filter 15 through the precise filter 15. The online ion chromatography automatic cleaning online measurement calibration sample injector can realize online sampling and online calibration, can also realize automatic cleaning, remotely controls high-concentration standard liquid mother liquor to be automatically diluted into a calibration concentration standard liquid, and realizes an automatic calibration function. The device can be independently used as a device, can also be integrated in large-scale equipment, can continuously supply liquid for ion chromatography, and can be used for on-line measurement occasions by using the device.
When low-concentration on-line measurement is carried out, the on-line sample is pumped by the injection pump 1, enters the liquid storage ring 8 through the fourth port 12 of the six-way valve 2, the injection pump 1 pushes back, the water sample in the liquid storage ring 8 is pumped out through the sixth port 14 of the six-way valve 2, is injected into the ion chromatograph for analysis through the normally-closed port of the liquid inlet valve 3, and the redundant sample is discharged through the normally-open port of the liquid inlet valve 3.
When high-concentration online measurement is carried out, if the concentration of a measured water sample is too high, an automatic dilution flow is started, the water sample is pumped through the injection pump 1, an online sample enters the liquid storage ring 8 through the fourth port 12 of the six-way valve 2, the injection pump 1 is reversely pushed, the water sample in the liquid storage ring 8 is pumped through the third port 11 of the six-way valve 2, the water sample enters the liquid storage ring 8 through the mixed liquid valve 5, the injection pump 1 is reversely pushed, the carrier liquid in the liquid storage ring 8 is pumped through the third port 11 of the six-way valve 2, the carrier liquid is ultrapure water, the carrier liquid enters the liquid storage ring 6 through the mixed liquid valve 5, the mixed dilution is carried out with the online sample, the stroke of the injection pump 1 is controlled, the continuous concentration dilution within 1000 times is achieved, the diluted sample is pumped through the injection pump 1 and enters the liquid storage ring 8 through the third port 11 of the six-way valve 2, the carrier liquid in the liquid storage ring 8 is reversely pushed through the third port 11 of the six-way valve 2, the excessive sample in the carrier liquid is discharged through the normally-closed valve 14, and the excessive sample in the liquid sample is analyzed through the normally-open chromatographic valve.
When the standard is needed, the high-concentration standard liquid mother liquor 4 is pumped by the injection pump 1, the standard liquid mother liquor enters the liquid storage ring 8 through the fifth port 13 of the six-way valve 2, the injection pump 1 is reversely pushed, the standard liquid mother liquor in the liquid storage ring 8 is pumped out through the third port 11 of the six-way valve 2, enters the liquid mixing chamber 6 through the liquid mixing valve 5, is pumped by the injection pump 1, the carrier liquid enters the liquid storage ring 8 through the third port 11 of the six-way valve 2, the injection pump 1 is reversely pushed, the carrier liquid in the liquid storage ring 8 is pumped out through the third port 11 of the six-way valve 2, enters the liquid mixing chamber 6 through the liquid mixing valve 5, is mixed and diluted with the standard liquid mother liquor, the stroke of the injection pump 1 is controlled, the sample injection amount of the standard liquid mother liquor and the carrier liquid is controlled to achieve the dilution of the stepless concentration within 1000 times, then the standard liquid with different concentrations is diluted into any part of standard liquids with different concentrations, the standard liquids with different concentrations are configured according to the requirement, the diluted sample is pumped by the injection pump 1, enters the liquid storage ring 8 through the third port 11 of the six-way valve 2, the injection pump 1 is reversely pushed, the water sample in the liquid storage ring 8 is beaten out through the sixth port 14 of the six-way valve 2, is injected into the ion chromatograph for analysis through the normally closed port of the liquid inlet valve, the redundant standard liquid is discharged through the normally open port of the liquid inlet valve, and the process is repeated for the specified times, so that the calibration is completed.
When the sample injection pipeline needs to be cleaned, carrier liquid is pumped by the injection pump 1 to enter the liquid storage ring 8, and the ion chromatography sample injection pipe is cleaned by the sixth port 14 of the six-way valve 2.
When the mixed liquid chamber 6 needs to be cleaned, the injection pump 1 is used for pumping carrier liquid into the liquid storage ring 8, the mixed liquid chamber 6 is cleaned through the third port 11 of the six-way valve 2, after cleaning is finished, the pumping air enters the liquid storage ring 8, the air is pumped into the mixed liquid chamber 6 through the first port 9 of the six-way valve 2, the waste liquid in the mixed liquid chamber 6 is discharged through the mixed liquid valve 5, and the waste liquid is directly discharged through an independent waste discharge port, so that the liquid storage ring and a sample injection pipeline are not polluted by back pumping.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (3)
1. The on-line ion chromatography automatic cleaning on-line measurement calibration sample injector is characterized by comprising an injection pump, a six-way valve, a liquid inlet valve, a high-concentration standard liquid mother liquor, a liquid mixing valve, a liquid mixing chamber and an exhaust valve, wherein the injection pump is connected with the six-way valve through a liquid storage ring, the injection pump is communicated with carrier liquid, the six-way valve comprises a first port, a second port, a third port, a fourth port, a fifth port and a sixth port, the first port is communicated with an upper port of the liquid mixing chamber through the exhaust valve, the other end of the exhaust valve is communicated with air, the liquid mixing valve is communicated with the liquid mixing chamber, the liquid mixing valve is also connected with the third port, one end of the liquid mixing valve, far away from the liquid mixing chamber, is connected with a waste liquid collecting device, the fourth port is connected with a sample inlet, the fifth port is connected with the high-concentration standard liquid mother liquor through a pipeline, one end of the liquid inlet valve is connected with the liquid collecting device, the other end of the liquid inlet valve is connected with a precision filter, and the ion chromatography internal injection is performed after the ion chromatography filter;
when low-concentration online measurement is carried out, pumping is carried out through a syringe pump, an online sample enters a liquid storage ring through a fourth port of a six-way valve, the syringe pump pushes back, a water sample in the liquid storage ring is beaten out through the sixth port of the six-way valve, is injected into ion chromatograph through a normally closed port of a liquid inlet valve for analysis, and redundant sample is discharged through a normally open port of the liquid inlet valve;
when high-concentration online measurement is carried out, if the concentration of a detected water sample is too high, an automatic dilution flow is started, an injection pump is used for pumping, an online sample enters a liquid storage ring through a fourth port of a six-way valve, the injection pump is used for back-pushing, the water sample in the liquid storage ring is pumped out through the third port of the six-way valve, the water sample enters a liquid mixing chamber through the liquid mixing valve, and is pumped through the injection pump, carrier fluid enters the liquid storage ring through the third port of the six-way valve, wherein the carrier fluid is ultrapure water, the carrier fluid in the liquid storage ring is pumped out through the third port of the six-way valve, enters the liquid mixing chamber through the liquid mixing valve, is mixed and diluted with the online sample, the injection pump stroke is controlled, the sample and the carrier fluid are controlled to achieve stepless concentration dilution within 1000 times, the diluted sample is pumped into the liquid storage ring through the third port of the six-way valve, the injection pump is used for back-pushing, the water sample in the liquid storage ring is pumped out through the sixth port of the six-way valve, the carrier fluid sample is injected into the ion chromatograph, and is analyzed through the normally-open port of the liquid inlet valve, and the sample in the ion chromatograph is discharged through the pump;
when the calibration is needed, the high-concentration standard liquid mother liquor is pumped through the injection pump, the standard liquid mother liquor enters the liquid storage ring through the fifth port of the six-way valve, the injection pump is pushed back, the standard liquid in the liquid storage ring is pumped out through the third port of the six-way valve, the mixed liquid enters the liquid mixing chamber through the liquid mixing valve, the injection pump is used for pumping, the current carrying liquid enters the liquid storage ring through the third port of the six-way valve, the injection pump is pushed back, the current carrying liquid in the liquid storage ring is pumped out through the third port of the six-way valve, enters the liquid mixing chamber through the liquid mixing valve, is mixed and diluted with the standard liquid mother liquor, the injection pump stroke is controlled, the sample injection amount of the standard liquid mother liquor and the current carrying liquid is controlled, the standard liquid mother liquor is diluted to be less than 1000 times, then the standard liquid with different concentrations is optionally prepared, the standard liquid with different concentrations is pumped out through the injection pump, the diluted sample enters the liquid storage ring through the third port of the six-way valve, the water sample in the liquid storage ring is pumped out through the sixth port of the six-way valve, the normal-state ion sample is pumped out through the normal-state ion valve, the normal-state sample is pumped through the normal-state ion sample liquid is pumped through the normal state, the normal state sample liquid is discharged through the normal state sample liquid, and the normal state sample is repeatedly enters the normal state through the normal state sample through the valve, and the normal state sample liquid, and the normal state sample is subjected to the normal state to the sample condition and the sample condition.
2. The on-line ion chromatography automatic cleaning on-line measurement calibration sample injector according to claim 1, wherein when the sample injection pipeline is required to be cleaned, carrier fluid is pumped into the liquid storage ring by the injection pump, and the ion chromatography sample injection pipe is cleaned by a sixth port of the six-way valve.
3. The on-line ion chromatography automatic cleaning on-line measurement calibration sample injector according to claim 1, wherein when the mixing chamber needs to be cleaned, carrier fluid is pumped into the liquid storage ring through the injection pump, the mixing chamber is cleaned through the third port of the six-way valve, after cleaning is completed, air is pumped into the liquid storage ring, the air is pumped into the mixing chamber through the first port of the six-way valve, waste liquid in the mixing chamber is discharged through the mixing valve, the waste liquid is directly discharged through the independent waste discharge port, and no more pollution to the liquid storage ring and the sample injection pipeline is pumped back.
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| CN202110058314.7A CN113624905B (en) | 2021-05-24 | 2021-05-24 | Online ion chromatograph automatic cleaning online measurement calibration sample injector |
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| Title |
|---|
| 基于3D自动进样器的自动稀释系统设计;马兴录;周环宇;马维军;;计算机测量与控制(第08期);全文 * |
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| CN113624905A (en) | 2021-11-09 |
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