CN208537538U - A kind of micro-fluidic chip - Google Patents
A kind of micro-fluidic chip Download PDFInfo
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- CN208537538U CN208537538U CN201821301796.4U CN201821301796U CN208537538U CN 208537538 U CN208537538 U CN 208537538U CN 201821301796 U CN201821301796 U CN 201821301796U CN 208537538 U CN208537538 U CN 208537538U
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Abstract
The utility model relates to monitoring water quality on line field more particularly to a kind of micro-fluidic chips.A kind of micro-fluidic chip, including glass-chip ontology；The glass-chip is set inside the body chip runner；The chip runner includes along the sequentially connected liquid input section in fluid conveying direction, mixing section and liquid section out；Wave tube side is equipped in the mixing section；The liquid input section includes main feed liquor tube side, and the clear water tube side, standard liquid tube side, water sample tube side and the reagent tube side that communicate with main feed liquor tube side；The standard liquid tube side, water sample tube side and reagent tube side and the joint of main feed liquor tube side are set gradually along fluid conveying direction；The joint of the clear water tube side and main feed liquor tube side is not at the joint downstream of standard liquid tube side Yu main feed liquor tube side.The micro-fluidic chip have the characteristics that compact structure and portable can carry, reagent loss rate is small and analysis it is fireballing.
Description
Technical field
The utility model relates to monitoring water quality on line field more particularly to a kind of micro-fluidic chips.
Background technique
Water quality indicator be to evaluate water sample characteristic and its functional important parameter, can be to water according to water quality indicator
Weight is classified, estimated risk and reasonable sanding.The water quality indicator in China has been formed than more complete body at present
System, including the multiple fields such as surface water, underground water, urban drainage, industrial wastewater, to environmental protection, hydraulic engineering, biological treatment
Equal fields are significant.Water quality indicator mainly includes physical index and chemical index, and wherein chemical index reflects the negative of environment
Lotus state, such as COD, ammonia nitrogen, total phosphorus, therefore online and portable monitoring demand is very big.Currently, Organic substance in water, ion, micro-
The detection of amount ingredient, element relies primarily on instrument analysis means, using colorimetric method as representative.Colorimetric method is to generate colored compound
Based on chromogenic reaction, by comparing or coloring matter solution colour depth is measured to determine constituent content to be measured, measurement index
More, process is simple and easy.For example, reagent colorimetric method measurement ammonia nitrogen, alkaline chitinase resolution ultraviolet spectrophotometry are surveyed
Measure total nitrogen, ammonium molybdate spectrophotometric method measurement total phosphorus, o-tolidine colorimetric method measurement chlorine residue etc..
The detection in laboratory for water sample micro constitutent, part ion mainly uses UV-Vis spectrophotometry light at present
Degree meter, while being widely used, there is also some disadvantages and problems.The portability of one side instrument is bad or portable light
Degree meter performance is not high (for example lack ultra-violet (UV) band etc.), needs to take fully enough water samples when detecting field water and saves encapsulation, then takes back reality
Room is tested to be further analyzed；On the other hand, colorimetric method operating process is relatively complicated, and the starting and preheating of equipment (refer mainly to
Spectrophotometer) half-hour period is needed, affect the efficiency of experimental analysis；Finally, the medicament of consumption is also relatively more, primary
It can measure an index, efficiency is relatively low etc..
Microfluidic chip technology (Micro fluidics) is biological, chemical, medical analysis process sample preparation, instead
It the basic operation units such as answers, separate, detecting be integrated on the chip of one piece of micro-meter scale, being automatically performed analysis overall process, have
Wide applicability and application prospect.
Summary of the invention
To solve the above-mentioned problems, the purpose of this utility model is to provide a kind of micro-fluidic chips, have compact structure
And portable can carry, reagent loss rate is small and the fireballing feature of analysis.
In order to achieve the above purpose, the utility model uses technical solution below:
A kind of micro-fluidic chip, including glass-chip ontology；It is characterized by: the glass-chip is set inside the body
Chip runner；The chip runner includes along the sequentially connected liquid input section in fluid conveying direction, mixing section and liquid section out；It is described mixed
It closes and is equipped with wave tube side in section；The liquid input section includes main feed liquor tube side, and the clear water tube side, the mark that communicate with main feed liquor tube side
Liquid pipe journey, water sample tube side and reagent tube side；The joint of the standard liquid tube side, water sample tube side and reagent tube side and main feed liquor tube side
It is set gradually along fluid conveying direction；The joint of the clear water tube side and main feed liquor tube side is not at standard liquid tube side and main feed liquor
The joint downstream of tube side.
Preferably, the reagent tube side includes the first reagent tube side and the second reagent tube side；First reagent tube side, second
Reagent tube side is intersected in same point with main feed liquor tube side.
Preferably, the mixing section includes a plurality of wave tube side for being arranged side by side and being sequentially connected.
Preferably, the aperture of the chip runner is 0.5mm.
By adopting the above technical scheme, which is related to a kind of micro-fluidic chip to the utility model, the micro-fluidic chip
In, clear water tube side is placed in the port of entire flow path most started, and makes the beginning of test and terminates the cleaning process of state conveniently
Thoroughly；Standard liquid tube side is placed in front of water sample tube side, and makes standard specimen and water sample physical isolation by cleaning process, prevent its mutually it
Between cross contamination.First reagent tube side and the second reagent tube side import position are overlapped, and purpose makes reagent one and the same stepping of reagent two
Sample, synchronized mixes.The subsequent mixing section for having installed relatively long distance additional, mixing section are wave tube side, and main function is to make reagent one, examination
It is sufficiently mixed between agent two and water sample three, enters in the logical detection cell of further microfluidic after mixing and detected.The utility model
By adopting the above technical scheme, using microfluidic chip technology as core, has the characteristics that compact structure and can portable carrying.Meanwhile by
In using microfluidic technology, reagent consumption is small, and about 100 microlitres of amount of reagent, conventional instrument consumption is 1mL, about ten/
One or so.Reagent consumption is small, and cost reduces, and pollution reduces.And chip can be automatically performed survey within the several seconds to tens of seconds time
It is fixed, separation or other more complicated operations.Analysis and separating rate are often higher than one or two order of magnitude of macroscopic analysis method.With ammonia
For nitrogen test, the conventional on-line monitoring ammonia nitrogen instrument test time usually requires 20min, and In Microfluidic Analytical Systems can be 2
Detection can be completed within minute.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of ammonia nitrogen on-line computing model in situ.
Fig. 2 is the structural schematic diagram of micro-fluidic chip.
Fig. 3 is the structural schematic diagram one (no upper cover) of NH 3 device.
Fig. 4 is the structural schematic diagram two (having upper cover) of NH 3 device.
Fig. 5 is the structural schematic diagram of flow cell.
Specific embodiment
With reference to the accompanying drawing, the preferred embodiment of the utility model is described in further detail.
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.
In the description of the present invention, it should be understood that term " on ", "lower", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as "top", "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation；Therefore it should not be understood as limiting the present invention.Also, term " on
Trip " and " downstream " are on the basis of the flow direction of fluid in entire line monitor.
One kind as shown in Fig. 1~5 be based on microflow control technique original position ammonia nitrogen on-line computing model, including transfusion system 1 and
It is connected to the micro-fluidic chip 2 in 1 downstream of transfusion system, and is connected to the NH 3 device 3 in 2 downstream of micro-fluidic chip.It should
Technical solution is related to one kind based on microflow control technique original position ammonia nitrogen on-line computing model, and the on-line computing model is with 2 skill of micro-fluidic chip
Art is core, constructs a set of micro-full analytical system and is automatically monitored on-line to Water quality ammonia nitrogen.With reach miniaturization, it is miniature
Change, facilitation, micro-sampling and the purpose quickly detected.Specifically, below for defeated in ammonia nitrogen on-line computing model in situ
Liquid system 1, micro-fluidic chip 2 and NH 3 device 3 are described in detail.
Transfusion system
The transfusion system 1 includes clear water pipeline 11, standard liquid pipeline 12, water sample pipeline 13, the first reagent cartridge 14 and the
Two reagent cartridges 15.Also, the clear water pipeline 11, standard liquid pipeline 12, water sample pipeline 13, the first reagent cartridge 14 and the second examination
Agent pipeline 15 is both connected on gas flow control device 16.As shown in fig. 1, clear water pipeline 11, standard liquid pipeline 12, water sample pipe
Road 13, the first reagent cartridge 14 and the second reagent cartridge 15 respectively by fresh water container 111, standard liquid container 121, water sample container 131,
First reagent container 141 and the second reagent container 151 are drawn, after gas flow control device 16 introduces air into said vesse,
Corresponding Pipeline transport liquid is driven by atmospheric pressure.The program pushes water sample sample introduction by Pneumatic constant pressure, and realization is micro, even
It is continuous, stablize, few the advantages that pumping few valve.Use a pneumatic supply, connect four groups of partial pressure valves and switch valve, directly with rear end air pressure
Reagent, water sample ejected wash water of driving etc. are connected, and reduce a large amount of triple valve, multi-way valve structure demand.
Micro-fluidic chip 2
The micro-fluidic chip 2 includes glass-chip ontology 21.The inside of the glass-chip ontology 21 is equipped with chip stream
Road.The chip runner includes along the sequentially connected liquid input section in fluid conveying direction, mixing section and liquid section 28 out.The liquid input section
Including main feed liquor tube side 22, and the clear water tube side 23, standard liquid tube side 24, water sample tube side 25 and the examination that are communicated with main feed liquor tube side 22
Agent tube side.The joint of the standard liquid tube side 24, water sample tube side 25 and reagent tube side and main feed liquor tube side 22 is along fluid conveying side
To setting gradually.The joint of the clear water tube side 23 and main feed liquor tube side 22 is not at standard liquid tube side 24 and main feed liquor tube side 22
Joint downstream.The reagent tube side includes the first reagent tube side 26 and the second reagent tube side 29.First reagent tube side 26,
Two reagent tube sides 29 are intersected in same point with main feed liquor tube side 22.Wave tube side 27 is equipped in the mixing section, further
Specifically in embodiment, mixing section includes a plurality of wave tube side 27 for being arranged side by side and being sequentially connected.Above-mentioned micro-fluidic chip 2
The aperture of chip runner be 0.5mm, including liquid input section, mixing section and liquid section 28 out.The transfusion system 1 is including respectively and clearly
The clear water pipeline that water pipe journey 23, standard liquid tube side 24, water sample tube side 25, the first reagent tube side 26 are connected with the second reagent tube side 29
11, standard liquid pipeline 12, water sample pipeline 13, the first reagent cartridge 14 and the second reagent cartridge 15.
In the micro-fluidic chip 2, clear water tube side 23 is placed in the port of entire flow path most started, make test beginning and
The cleaning process of end state is easily and thoroughly.Standard liquid tube side 24 is placed in front of water sample tube side 25, and makes standard specimen by cleaning process
With water sample physical isolation, its cross contamination from each other is prevented.29 import position of first reagent tube side 26 and the second reagent tube side
It is overlapped, purpose makes the sample introduction synchronous with reagent two of reagent one, synchronized mixes.The subsequent mixing section for having installed relatively long distance additional, mixing section
For wave tube side 27, main function is to make to be sufficiently mixed between reagent one, reagent two and water sample three, is entered after mixing subsequent
It is detected in micro- circulation detecting pool.The utility model by adopting the above technical scheme, with micro-fluidic chip 2 have compact structure and
It can portable carrying feature.Simultaneously as reagent consumption is small using microfluidic technology, and about 100 microlitres of amount of reagent, conventional instrument
Device consumption is 1mL, about 1/10th or so.Reagent consumption is small, and cost reduces, and pollution reduces.And chip can the several seconds extremely
Measurement, separation or other more complicated operations are automatically performed in tens of seconds times.Analysis and separating rate are often higher than macroscopic analysis
One or two order of magnitude of method.By taking ammonia nitrogen is tested as an example, the conventional on-line monitoring ammonia nitrogen instrument test time usually requires 20min,
And detection can be completed in In Microfluidic Analytical Systems within 2 minutes.
NH 3 device 3
The NH 3 device 3 include pedestal 31, and be arranged on pedestal 31 flow cell 32, inlet pipeline 33,
Outlet pipeline 34, LED lamp source 35 and photoelectric detection component 36.
Wherein, the flow cell 32 includes the main body 321 being made of the opaque organic glass of black.In the main body 321
Portion is equipped with runner, and runner includes input section 322, detection section 323 and deferent segment 324.The input section 322, detection section 323 and defeated
The both ends of section 324 are provided on 321 side wall of main body out, the terminal part of input section 322 and the top portion difference of deferent segment 324
It is connected with the both ends of detection section 323, and 321 side wall of main body for being connected to position is closed by transparent glass sheet 325.The inspection
The linear setting of section 323 is surveyed, the angle that input section 322, deferent segment 324 and detection section 323 are constituted is acute angle；Wherein one
In kind specific embodiment, the main body 321 of the flow cell 32 is the cuboid of 10mm*10mm*20mm, the input section of runner
322, it detects section 323 and deferent segment 324 is in the same plane.The both ends of detection section 323 are provided with two lateral walls respectively
At center, the top portion of input section 322 and the terminal part of deferent segment 324 are provided at the center of other two opposite side walls；Detection
The length of section 323 is 10mm, and the runner internal diameter including input section 322, detection section 323 and deferent segment 324 is 0.5mm.It is above-mentioned
Flow cell 32 in scheme includes the main body 321 being made of the opaque organic glass of black, black acrylic (PMMA) shading
Effect is good.Runner is equipped with inside main body 321, the light that optical fiber issues when detection can only pass through runner section light transmission, according to bright Bobi
You determine rate, and the length of light path can meet high-precision ammonia nitrogen concentration detection demand.The runner includes input section 322, detection section
323 and deferent segment 324, and the linear setting of section 323 is detected, what input section 322, deferent segment 324 and detection section 323 were constituted
Angle is acute angle.Using the circulation sample introduction design of unique Z-type, compared to conventional orthogonal runner, detection cell master can be effectively prevented
Access end positions are detained bubble, influence to test signal, and strengthen the cleaning effect of flow cell 32, reduce the memory of test
Effect.And the transparent glass sheet 325 on 321 side wall of main body can guarantee light transmission rate and high stability.Quartz material is stablized, no
Deformation discoloration, ensure that flow cell 32 can with stable operation for a long time there is a situation where leakage or failure.
Two pipe fitting fixing seats 37 and two fiber fixed seats 38 are additionally provided on the pedestal 31 of 32 surrounding of flow cell,
Inlet pipeline 33 and outlet pipeline 34 are fixed by pipe fitting fixing seat 37, and LED lamp source 35 and photoelectric detection component 36 pass through light
Fine fixing seat 38 is fixed.The NH 3 device 3 further includes upper cover 39, and the upper cover 39 is covered on flow cell 32, pipe fitting
38 top of fixing seat 37 and fiber fixed seat.Wherein, the beginning of the inlet pipeline 33 is connected to the output end of micro-fluidic chip 2
On, end is connected in 322 top portion of input section of flow cell 32, and outlet pipeline 34 is connected to the terminal part of deferent segment 324.Institute
It states LED lamp source 35 and photoelectric detection component 36 corresponds respectively to the both ends of detection section 323, and the projection side of LED lamp source 35
Photoelectric detection component 36 is directed toward to along detection section 323.It is related to a kind of NH 3 device 3, the NH 3 in the technical solution
Inlet pipeline 33 in device 3 introduces detection liquid, and cocurrent enters in the runner of flow cell 32, and outlet pipeline 34 is useless for drawing
Liquid.The light that LED lamp source 35 issues can be calculated by the detection section 323 of runner, and after receiving via photoelectric detection component 36
Absorbance, must be discharged in ammonia nitrogen concentration.
The analysis flow path workflow of ammonia nitrogen on-line computing model in situ
1) water sample is replaced: water sample sample introduction, remaining mouthful of position is closed, and flow path control replaces 1min in 200 μ L/min, water sample.Make
Water sample is full of microchip, and detects blank signal in micro- flow cell 32 in real-time online at this time.
2) color developing detection: water sample sample introduction, one sample introduction of reagent, two sample introduction of reagent, remaining mouthful of position are closed；Every flow path of flow path is equal
Control is in 50 μ L/min；After replacing 20s, the color signal in the micro- flow cell 32 of real-time in-line testing.By color signal value and
Absorbance is calculated in blank signal value, must be discharged in ammonia nitrogen concentration.
3) it cleans: after detecting color signal, opening ejected wash water implication pump, other mouthful of position is closed；Ejected wash water sample introduction is pushed,
Ejected wash water flow path is controlled in 200 μ L/min；Ejected wash water cleans entire chip and further microfluidic leads to pond 32, and rinsing 1min can be into
Sample.
Above-mentioned steps 2) in colour developing tested using conventional salicylic acid method, agent prescription is following (to prepare mark with 1L amount
It is quasi-):
Reagent one
According to 130g/L, (weight readings are accurate to ± 2g) weighs sodium salicylate and trisodium citrate respectively, pours into 1L's
In beaker, the water of beaker ull-scale value about 80% is added, is then stirred with glass bar, until being completely dissolved.It adds
(weight is accurate to ± 0.02g to the sodium nitroprussiate of 1.0g/L, since sodium nitroprussiate is hard solid, when weighing, should control the big of fragment
It is small；) dissolution when, stirred on one side using glass bar in beaker center, on one side slightly smash sodium nitroprussiate solid to pieces, until beaker bottom is seen
Less than the tiny particles content and then addition distilled water that can be glistened to ull-scale value, after finally being stirred three minutes with glass bar again,
It stands, for use.
Reagent two
32g/L is weighed, the sodium hydroxide of (weight degree is accurate to ± 0.2g) is poured slowly into the beaker of 1L, is slowly added
The distilled water for entering beaker ull-scale value 50%, is constantly stirred with glass bar, until sodium hydroxide be completely dissolved (sodium hydroxide if any
Caking phenomenon can slightly be smashed to pieces with glass bar, accelerate dissolution).After dissolution, solution is waited to be cooled to room temperature, then added again
2.0g/L sodium dichloro cyanurate (weight readings essence is added in the distilled water for entering about 30% beaker ull-scale value while stirring
Really to ± 0.1g).Until completely dissolved, then plus distilled water to beaker ull-scale value at.Stirring three minutes is stood, for use.
Standard solution
(returned using pan paper by the way of claiming, actual weight is the difference of front and back weight twice) using weight reduction, weigh in
(reading precisely to ± 0.005g), pours into ammonium chloride (NH4CL, standard items) 3.8190g/L of 100~105 DEG C of dryings 2 hours
In 1000mL volumetric flask, after the water that addition accounts for about 80% volume of volumetric flask is completely dissolved, it is settled to graduation mark with water, is shaken up, it is quiet
It sets, for use.
The entire testing process of above-mentioned original position ammonia nitrogen on-line computing model is less than 4min.Better than conventional method for testing ammonia nitrogen
The testing time of 20min is 100 microlitres to one reagent of reagent, two consumption, much smaller than conventional method for testing ammonia nitrogen quantitative loop into
1000 microlitres of each sample volumes of sample；Ejected wash water consumption is that 2mL is each, again smaller than conventional ammonia nitrogen ejected wash water consumption.
The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not
It is confined to this, anyone skilled in the art is within the technical scope disclosed by the utility model, practical according to this
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (4)
1. a kind of micro-fluidic chip, including glass-chip ontology；It is characterized by: the glass-chip is set inside the body core
Piece runner；The chip runner includes along the sequentially connected liquid input section in fluid conveying direction, mixing section and liquid section out；The mixing
Wave tube side is equipped in section；The liquid input section includes main feed liquor tube side, and communicated with main feed liquor tube side clear water tube side, standard liquid
Tube side, water sample tube side and reagent tube side；The joint edge of the standard liquid tube side, water sample tube side and reagent tube side and main feed liquor tube side
Fluid conveying direction is set gradually；The joint of the clear water tube side and main feed liquor tube side is not at standard liquid tube side and main inlet tube
The joint downstream of journey.
2. a kind of micro-fluidic chip according to claim 1, it is characterised in that: the reagent tube side includes the first Reagent Tube
Journey and the second reagent tube side；First reagent tube side, the second reagent tube side are intersected in same point with main feed liquor tube side.
3. a kind of micro-fluidic chip according to claim 1, it is characterised in that: the mixing section includes a plurality of is arranged side by side
And the wave tube side being sequentially connected.
4. a kind of micro-fluidic chip described in any one of claim 1 to 3, it is characterised in that: the chip runner
Aperture is 0.5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821301796.4U CN208537538U (en) | 2018-08-14 | 2018-08-14 | A kind of micro-fluidic chip |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821301796.4U CN208537538U (en) | 2018-08-14 | 2018-08-14 | A kind of micro-fluidic chip |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024007482A1 (en) * | 2022-07-06 | 2024-01-11 | 清华大学 | Solid reagent for detection of ammonia nitrogen and detection method therefor |
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- 2018-08-14 CN CN201821301796.4U patent/CN208537538U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024007482A1 (en) * | 2022-07-06 | 2024-01-11 | 清华大学 | Solid reagent for detection of ammonia nitrogen and detection method therefor |
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