CN117031055A - Flow analysis system with bubble interval continuous flow and flow injection switchable - Google Patents
Flow analysis system with bubble interval continuous flow and flow injection switchable Download PDFInfo
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- CN117031055A CN117031055A CN202311078774.1A CN202311078774A CN117031055A CN 117031055 A CN117031055 A CN 117031055A CN 202311078774 A CN202311078774 A CN 202311078774A CN 117031055 A CN117031055 A CN 117031055A
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- 238000005206 flow analysis Methods 0.000 title claims abstract description 58
- 238000004401 flow injection analysis Methods 0.000 title claims abstract description 54
- 230000007246 mechanism Effects 0.000 claims abstract description 80
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 238000004458 analytical method Methods 0.000 claims abstract description 42
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims abstract description 27
- 238000001514 detection method Methods 0.000 claims abstract description 27
- 238000002347 injection Methods 0.000 claims abstract description 22
- 239000007924 injection Substances 0.000 claims abstract description 22
- 238000012545 processing Methods 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 5
- 238000005070 sampling Methods 0.000 claims description 31
- 239000003153 chemical reaction reagent Substances 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 238000012360 testing method Methods 0.000 claims description 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000010354 integration Effects 0.000 abstract description 3
- 239000000523 sample Substances 0.000 description 77
- 238000000034 method Methods 0.000 description 12
- 238000009954 braiding Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OWEGMIWEEQEYGQ-UHFFFAOYSA-N 100676-05-9 Natural products OC1C(O)C(O)C(CO)OC1OCC1C(O)C(O)C(O)C(OC2C(OC(O)C(O)C2O)CO)O1 OWEGMIWEEQEYGQ-UHFFFAOYSA-N 0.000 description 1
- 229930091371 Fructose Natural products 0.000 description 1
- RFSUNEUAIZKAJO-ARQDHWQXSA-N Fructose Chemical compound OC[C@H]1O[C@](O)(CO)[C@@H](O)[C@@H]1O RFSUNEUAIZKAJO-ARQDHWQXSA-N 0.000 description 1
- 239000005715 Fructose Substances 0.000 description 1
- GUBGYTABKSRVRQ-PICCSMPSSA-N Maltose Natural products O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@@H](CO)OC(O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-PICCSMPSSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- GUBGYTABKSRVRQ-QUYVBRFLSA-N beta-maltose Chemical compound OC[C@H]1O[C@H](O[C@H]2[C@H](O)[C@@H](O)[C@H](O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@@H]1O GUBGYTABKSRVRQ-QUYVBRFLSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002572 peristaltic effect Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000012488 sample solution Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 235000000346 sugar Nutrition 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/08—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor using a stream of discrete samples flowing along a tube system, e.g. flow injection analysis
- G01N35/085—Flow Injection Analysis
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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)
Abstract
The invention discloses a flow analysis system with switchable bubble interval continuous flow and flow injection, wherein a transmission part comprises an automatic sample injection mechanism, a liquid introduction mechanism and a shunt electromagnetic valve. The analysis unit includes a FIA flow analysis means, a SCFA flow path analysis means, a detection means, and a data processing unit. The FIA flow analysis mechanism is used for sequentially and quantitatively injecting a liquid sample to be analyzed into the FIA flow analysis mechanism, and the SCFA flow path analysis mechanism is provided with at least one bubble adding device and at least one bubble removing device. The detection mechanism is used for receiving the liquid samples processed by the FIA flow analysis mechanism and the SCFA flow path analysis mechanism, and obtaining the concentration of the substance to be detected through measuring the signal value. The data processing working unit is used for receiving the signal value transmitted by the detection mechanism and analyzing and processing the signal value. The invention realizes the continuous flow analysis or the flow injection of the bubble interval on the same flow analysis instrument, thereby adapting to the detection requirements under different conditions, having higher integration and improving the detection efficiency.
Description
Technical Field
The invention relates to the technical field of flow analysis systems, in particular to a flow analysis system with bubbles capable of continuously flowing at intervals and being switched in flow injection.
Background
Bubble-gap continuous flow analysis (Segmented Continuous Flow Analysis, SCFA), which was proposed by Skeggs, an engineer of Technicon corporation in the united states, was the first time to transfer an analysis sample and reagents into a tube from a conventional tube, beaker vessel, and the sample and reagents were physically mixed and chemically reacted in a continuous flow, late in the 50 th century. The analysis still maintains the concept that traditional operations eventually reach a physical and chemical equilibrium. The addition of bubbles to a liquid stream is also a steady-state flow analysis technique in order to create conditions for achieving two balances by utilizing the dual functions of stirring and barriers. In order to achieve an equilibrium state, this technique requires a long time for analysis, and is suitable for the reaction of a mixture having a difference in reaction kinetics, for example, the analysis of different types of reducing sugars, and it is necessary to wait for equilibrium and then measure the reaction rate of maltose, fructose, and the like.
The flow injection analysis technique (Flow Injection Analysis, FIA), named for the first time by Ruzicka and Hansen, a denmark scholars in 1975, uses a method of injecting a certain volume of sample into a flowing reagent (carrier) without bubble intervals, ensures high reproducibility of mixing process and reaction time, completes on-line processing and measurement of the sample with high efficiency in an unbalanced state, and is an unsteady flow analysis technique. The technology does not need to reach an equilibrium state, has high analysis speed, and is suitable for analyzing a single mixture or a mixture with small reaction kinetics difference.
Since the 21 st century, commercial flow analysis instruments are fully bloomed at home and abroad, the technical standards based on SCFA and FIA are also endless, the environmental protection department of China has proposed 8 FIA standards and 3 SCFA standards, 4 FIA standards and 4 SCFA standards are included in drinking water GB/T5750-2023 which is immediately started to be implemented, but the current commercial flow analysis instruments are based on the flow injection analysis technology or the bubble interval continuous flow analysis technology, and the flow injection technology has high analysis sensitivity and high analysis speed and is more suitable for analyzing clean water samples; the bubble interval continuous flow sensitivity is slightly poor, the analysis speed is slightly slow, and the method is more suitable for the analysis of sewage samples; therefore, in actual detection work, different water samples are often analyzed by using two different instruments, and the cost is high. There is a need to design an analysis system that integrates two flow analysis techniques.
Disclosure of Invention
The invention aims at the defects of the prior art and provides a flow analysis system with bubbles capable of continuously flowing at intervals and being switched between flow injection.
The invention solves the technical problems by the following technical means: a flow analysis system with bubble interval continuous flow and switchable flow injection comprises a transmission part and an analysis part;
the transmission part comprises an automatic sample injection mechanism, a liquid introduction mechanism and a shunt electromagnetic valve;
an autosampler mechanism for acquiring an upstream liquid sample to be analyzed;
the liquid introducing mechanism is used for collecting the liquid sample to be analyzed and the matched reaction reagent, and conveying the liquid sample to the shunt electromagnetic valve for shunt injection to the analysis part;
the shunt electromagnetic valve is provided with a switching mechanism for switching the liquid sample to be analyzed and the matched reaction reagent to shunt and is used for quantitatively conveying the liquid sample to be analyzed and the matched reaction reagent to the analysis part;
the analysis part comprises a FIA flow analysis mechanism, an SCFA flow path analysis mechanism, a detection mechanism and a data processing working unit;
the FIA flow analysis mechanism is connected with at least one electric multi-position valve, and each electric multi-position valve is internally provided with a sampling ring for sequentially and quantitatively injecting a liquid sample to be analyzed and a matched reaction reagent into the FIA flow analysis mechanism;
the SCFA flow path analysis mechanism is provided with at least one bubble adding device and at least one bubble removing device;
the detection mechanism is used for receiving the liquid sample after the reaction treatment of the FIA flow analysis mechanism and the SCFA flow path analysis mechanism, and obtaining the concentration of the substance to be detected through measuring the signal value;
the data processing working unit is used for receiving the signal value transmitted by the detection mechanism and analyzing and processing the signal value.
Further, the shunt solenoid valve controls the liquid feed amount so that the introduction of the shunt of the liquid sample to be analyzed is repeatedly performed until the liquid sample to be analyzed in the FIA flow analysis means and the SCFA flow path analysis means reaches a predetermined amount.
Further, the length of the flow capillary of the FIA flow analysis mechanism and the SCFA flow analysis mechanism is 0.01-50m, and the inner diameter is 0.1-3.0mm.
Further, the automatic sample injection mechanism comprises a sample injection arm, a sample injection needle, a sample tray, a sample test tube, a first motor, a second motor and a third motor; the sample tube is used for placing a liquid sample to be analyzed, the sampling needle is used for collecting the sample in the sample tube and conveying the collected sample to the liquid introducing mechanism through a pipeline; the sampling arm is used for fixing a sampling needle; the sample tray is used for placing a sample test tube; the first motor is used for moving the sampling arm up and down, and when the sampling arm moves downwards, the first motor is used for sucking a liquid sample to be analyzed placed in the sample test tube; stopping sucking when the sample injection arm moves upwards; the second motor is used for rotating the sample injection arm or moving the sample injection arm in the X direction; the third motor is used for rotating the sample tray or moving the sample injection arm in the Y direction.
Further, the liquid introducing mechanism is a pump for conveying.
Compared with the prior art, the invention has the advantages that: according to the flow analysis system with the switchable bubble interval continuous flow and flow injection, the bubble interval continuous flow analysis or the flow injection is realized on the same flow analysis instrument, so that the system is suitable for detection requirements under different conditions, the integration is higher, and the detection efficiency is improved.
Drawings
FIG. 1 is a schematic diagram of a bubble-gap continuous flow and flow injection switchable flow analysis system of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. 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.
The foregoing is merely illustrative of the structures of this invention and various modifications, additions and substitutions for those skilled in the art can be made to the described embodiments without departing from the scope of the invention or from the scope of the invention as defined in the accompanying claims.
As shown in fig. 1, the flow analysis system with switchable bubble interval continuous flow and flow injection according to the present invention comprises a transmission part and an analysis part. The transmission part comprises an automatic sample injection mechanism, a liquid introduction mechanism and a shunt electromagnetic valve, and the automatic sample injection mechanism is used for acquiring an upstream liquid sample to be analyzed. The liquid introducing mechanism is used for collecting a liquid sample to be analyzed and a matched reagent, and conveying the liquid sample and the matched reagent to the shunt electromagnetic valve for shunt injection to the analysis part. And the shunt electromagnetic valve is provided with a switching mechanism for automatically switching the liquid sample to be analyzed or the matched reagent to shunt. The analysis unit includes a FIA flow analysis means, a SCFA flow path analysis means, a detection means, and a data processing unit. The FIA flow analysis mechanism is connected with at least one electric multi-position valve, and a sampling ring is arranged in each electric multi-position valve and is used for sequentially and quantitatively injecting liquid samples to be analyzed into the FIA flow analysis mechanism. The SCFA flow path analysis means is provided with at least one bubble adding device and at least one bubble removing device. The detection mechanism is used for receiving the liquid sample processed by the FIA flow analysis mechanism and the SCFA flow path analysis mechanism, and obtaining the concentration of the substance to be detected by measuring the signal value, and specifically, the detection mechanism can be an optical detector, an electrochemical detector and the like. The data processing working unit is used for receiving the signal value of absorbance transmitted by the detection mechanism and analyzing and processing the signal value.
According to the flow analysis system with the switchable bubble interval continuous flow and flow injection, the bubble interval continuous flow analysis or the flow injection is realized on the same flow analysis instrument, so that the system is suitable for detection requirements under different conditions, the integration is higher, and the detection efficiency is improved.
During the implementation, the automatic sampling mechanism includes sampling arm, sampling needle, sample dish, sample test tube, first motor, second motor and third motor, sample test tube is used for placing the liquid sample that waits to analyze, the sampling needle is used for gathering the sample in the sample test tube, and carry the sample of gathering to liquid introduction mechanism through the pipeline, sampling arm is used for fixed sampling needle, the sample dish is used for placing sample test tube, first motor is used for sampling arm's up-and-down motion, sampling arm moves down time, be in order to absorb the liquid sample that waits to analyze of placing in the sample test tube, sampling arm moves up time, stop absorbing, the second motor is used for sampling arm's rotary motion or sampling arm X direction's motion, the third motor is used for sampling arm's rotary motion or sampling arm Y direction's motion.
In the specific implementation, the shunt electromagnetic valve controls the liquid feeding amount in a manner of repeatedly executing the shunt introduction of the liquid sample to be analyzed or the matched reagent until the liquid sample to be analyzed in the FIA flow analysis mechanism and the SCFA flow path analysis mechanism reaches a specified amount.
The length of the flow capillary of the FIA flow analysis mechanism and the SCFA flow analysis mechanism is 0.01-50m, and the inner diameter is 0.1-3.0mm. The FIA flow analysis mechanism also comprises a tee joint, two-way parts, a sample pretreatment module, a braiding reactor and the like, wherein the sample pretreatment module comprises a sample distillation module, a condensation module, an extraction module, a heating module, a digestion module and the like. The SCFA flow path analysis mechanism also comprises five-way, four-way, three-way, two-way, a sample pretreatment module, a braiding reactor and the like, wherein the sample pretreatment module comprises modules of sample distillation, condensation, extraction, heating, digestion and the like. The bubble adding means adds bubbles, which may be air or other gas, to the flow path rhythmically. And the bubble removing device can remove bubbles in the flow path before entering the specific pipeline, so that the influence on the measured value is avoided.
The liquid introducing mechanism can be a pump for conveying, and the pump can be a peristaltic pump, an injection pump, a plunger pump, a constant flow pump and the like.
In particular, when the dynamic analysis system is used for analysis, a clean sample is generally analyzed by a FIA method, and a dirty sample is analyzed by a SCFA method.
The sample solution is poured into a sample tube of the automatic sampling mechanism, the sampling needle descends to suck the sample, and the sample automatically enters the FIA flow path part or the SCFA flow path part through a shunt electromagnetic valve.
The sample 1 is conveyed by a pump and enters a FIA flow analysis mechanism, the FIA flow analysis mechanism comprises an electric valve with six interfaces, namely an interface A, an interface B, an interface C, an interface D, an interface E and an interface F, which are communicated with each other in pairs, and in a sample loading state, the interface A is communicated with the interface F, the interface C is communicated with the interface B, and the interface E is communicated with the interface D; a sampling ring is connected between an F interface and a C interface of the electric multi-position valve, and in a sample injection state, an A interface is communicated with a B interface, an F interface is communicated with an E interface, and a D interface is communicated with a C interface. The sample is conveyed by the pump and firstly enters the interface A of the electric multi-position valve to be connected, a sampling ring connected between the interface F and the interface C is filled, and the redundant sample flows to waste through the interface B. The electric multi-position valve is automatically switched to a sample injection state, a reagent is conveyed into an E interface of the electric multi-position valve through a pump, a sample in a sampling ring is pushed out, the sample is communicated with other flow path components of the FIA flow path part through a D interface, after a series of chemical reactions, the sample finally enters a flow path interface of a detection mechanism, and after detection, liquid is discharged through a flow path connecting pipe. The data processing working unit is connected with the detection mechanism to process the signal value detected by the detector.
The sample 2 is conveyed by a pump to enter an SCFA flow path analysis mechanism, the SCFA flow path analysis mechanism comprises a bubble adding device, after the sample or the reagent is mixed with bubbles, the sample or the reagent passes through flow path components such as a five-way flow path component, a four-way flow path component, a three-way flow path component, a two-way flow path component, a sample pretreatment module, a braiding reactor and the like, enters a bubble removing device after a series of chemical reactions, removes bubbles in a flow path, finally enters a flow path interface of a detection mechanism, and after detection, liquid is discharged through a flow path connecting pipe. The data processing working unit is connected with the detection mechanism to process the signal value detected by the detection mechanism.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (5)
1. A flow analysis system with bubble interval continuous flow and switchable flow injection, which is characterized by comprising a transmission part and an analysis part;
the transmission part comprises an automatic sample injection mechanism, a liquid introduction mechanism and a shunt electromagnetic valve;
an autosampler mechanism for acquiring an upstream liquid sample to be analyzed;
the liquid introducing mechanism is used for collecting the liquid sample to be analyzed and the matched reaction reagent, and conveying the liquid sample to the shunt electromagnetic valve for shunt injection to the analysis part;
the shunt electromagnetic valve is provided with a switching mechanism for switching the liquid sample to be analyzed and the matched reaction reagent to shunt and is used for quantitatively conveying the liquid sample to be analyzed and the matched reaction reagent to the analysis part;
the analysis part comprises a FIA flow analysis mechanism, an SCFA flow path analysis mechanism, a detection mechanism and a data processing working unit;
the FIA flow analysis mechanism is connected with at least one electric multi-position valve, and each electric multi-position valve is internally provided with a sampling ring for sequentially and quantitatively injecting a liquid sample to be analyzed and a matched reaction reagent into the FIA flow analysis mechanism;
the SCFA flow path analysis mechanism is provided with at least one bubble adding device and at least one bubble removing device;
the detection mechanism is used for receiving the liquid sample after the reaction treatment of the FIA flow analysis mechanism and the SCFA flow path analysis mechanism, and obtaining the concentration of the substance to be detected through measuring the signal value;
the data processing working unit is used for receiving the signal value transmitted by the detection mechanism and analyzing and processing the signal value.
2. The bubble-gap continuous flow and flow injection switchable flow analysis system according to claim 1, wherein the flow diversion solenoid valve is configured to control the amount of liquid feed in such a manner that the flow diversion of the liquid sample to be analyzed is repeatedly performed until the liquid sample to be analyzed in the FIA flow analysis means and SCFA flow path analysis means reaches a predetermined amount.
3. The bubble-gap continuous flow and flow injection switchable flow analysis system of claim 2, wherein the flow capillaries of the FIA flow analysis mechanism and the SCFA flow analysis mechanism have a length of 0.01-50m and an inner diameter of 0.1-3.0mm.
4. The bubble-gap continuous flow and flow injection switchable flow analysis system of claim 3, wherein the autosampler mechanism comprises a sample arm, a sample needle, a sample tray, a sample tube, a first motor, a second motor, and a third motor; the sample tube is used for placing a liquid sample to be analyzed, the sampling needle is used for collecting the sample in the sample tube and conveying the collected sample to the liquid introducing mechanism through a pipeline; the sampling arm is used for fixing a sampling needle; the sample tray is used for placing a sample test tube; the first motor is used for moving the sampling arm up and down, and when the sampling arm moves downwards, the first motor is used for sucking a liquid sample to be analyzed placed in the sample test tube; stopping sucking when the sample injection arm moves upwards; the second motor is used for rotating the sample injection arm or moving the sample injection arm in the X direction; the third motor is used for rotating the sample tray or moving the sample injection arm in the Y direction.
5. The bubble-gap continuous flow and flow injection switchable flow analysis system of claim 4, wherein the liquid introduction mechanism is a pump delivery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202311078774.1A CN117031055A (en) | 2023-08-25 | 2023-08-25 | Flow analysis system with bubble interval continuous flow and flow injection switchable |
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| CN202311078774.1A CN117031055A (en) | 2023-08-25 | 2023-08-25 | Flow analysis system with bubble interval continuous flow and flow injection switchable |
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