CN1584575A - Electrochemical biological sensor and preparing method thereof - Google Patents
Electrochemical biological sensor and preparing method thereof Download PDFInfo
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- CN1584575A CN1584575A CN 200410038359 CN200410038359A CN1584575A CN 1584575 A CN1584575 A CN 1584575A CN 200410038359 CN200410038359 CN 200410038359 CN 200410038359 A CN200410038359 A CN 200410038359A CN 1584575 A CN1584575 A CN 1584575A
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Abstract
A transducer consists of electrode baseplate, double faced glue, hydrophilic coverplate, round operation electrode on baseplate, arc shaped reference electrode, combinated slot, combinated sampling channel, reacting reagent fixed at internal and external of arc shaped reference electrode. Its preparing method is also disclosed by the present invention.
Description
Technical field
The present invention relates to the electrochemical gaging blood analysis, is a kind of electrochemica biological sensor and manufacture method thereof concretely.
Background technology
Biology sensor is meant the combination of bioactive materials and physics transducer, and it can become the biological respinse information translation signals such as measurable light, electricity, thereby is used for the mensuration of sample concentration.Electrochemica biological sensor is bioactive materials to be fixed on electrode surface, biological respinse information are converted to measurable electric current or thereby current potential is used for the sensor systems that sample concentration is measured.Electrode and sampling channel are to be related to two key factors of electrochemica biological sensor to the measuring accuracy of measured object concentration, also are the essential distinctions of the biology sensor of different manufacturers.Electrode in the electrochemica biological sensor comprises working electrode and contrast electrode, and portioned product also comprises an auxiliary electrode.At present, the general application of electrochemica biological sensor is that reaction reagent is fixed on the electrode, so the shape of the structure of electrode, particularly electrode has influenced the precision of the stable and check of reagent.The formation of electrode is divided into two kinds: two square strip conductors that 1) are arranged in parallel are as working electrode and contrast electrode; 2) adopt three square strip conductors to make work electrode, contrast electrode and auxiliary electrode respectively; For disposable use electrochemica biological sensor strip, a kind of structure before general the employing.The effect of the sample intake passage of biology sensor be on the one hand for easy to operate, be convenient to sample collecting, be in order to control sampling quantity, to improve sample introduction precision and accuracy of measurement on the other hand.The difference of passage mainly is the groove shape on the double faced adhesive tape.Korea S All Medicus Co. Ltd. application the patent publication No. be: CN 1349610A, denomination of invention has disclosed a kind of electrochemica biological sensor in the patent document of " electrochemica biological sensor calibration tape, manufacture method and electrochemica biological sensor "; Fixing of electric machine structure and reagent, form a groove by impression or etching on first insulating substrate of this sensor, and adopt two square rails that are arranged in parallel as working electrode and contrast electrode, with in the groove of immobilization of reagents on the first insulation base and across parallel electrode; Sampling channel be one by the second insulation base and the first insulation base capillary space that the back forms by the second insulation base and groove on the first insulation base that bonds together.Though having solved, this patent is difficult to problems such as fixating reagent layer and electrode area be narrow in the conventional art, but this patent comes with some shortcomings: such as the parallel rectangular electrode can not guarantee that the reagent layer concentration on fixed thereon is even, the contact area of uncontrollable electrochemica biological sensor and measured object and the collection capacity of measured object, and measured object by kapillary enter in the groove with the first insulation base on electrode and reagent layer when reacting, the active electrode area of the conversion zone of measured object and electrode surface reagent layer and signals collecting is little, has influenced the accuracy of detection to measured object.
Summary of the invention
The object of the present invention is to provide a kind of electrochemica biological sensor and manufacture method thereof, more help reagent layer uniform spreading between working electrode and contrast electrode; And accurately controlled the contact area of strip and sample.
In order to realize the foregoing invention purpose, technical scheme of the present invention is
A kind of electrochemica biological sensor includes electrode plate (4), double faced adhesive tape (2) and hydrophilic cover (1), it is characterized in that:
(a) place circular working electrode (6) on the electrode plate;
(b) place circular arc contrast electrode (5) on the electrode plate;
(c) groove that has circular hole and slot to combine on the described double faced adhesive tape;
(d) be loaded with the double faced adhesive tape of described groove and described electrode plate and described hydrophilic cover and form sampling channel jointly.
(e) reaction reagent is fixed on the inside and the outside of described circular arc contrast electrode.
Described circular working electrode passes described circular arc contrast electrode by a rectangular guideway;
Described circular working electrode and described circular arc contrast electrode are made by serigraphy.
Described circular working electrode and described circular arc contrast electrode are made by magnetron sputtering.
Described circular working electrode and described circular arc contrast electrode are made by vacuum steaming degree.
The material of described circular working electrode and described circular arc contrast electrode can be a kind of material in carbon, gold, silver, palladium, platinum, the tin indium oxide.
The material of described electrode plate can be a kind of material among PVC (Polyvinylchloride), PET (polypropylene), the PP (polyester).
Contain an insulation course between described double faced adhesive tape and described electrode base
Described insulation course is an insullac.
A kind of method of making electrochemica biological sensor, described method comprise the following steps: to go up making circular working electrode (6) and circular arc contrast electrode (5) at electrode plate (4),
On described electrode plate, cover a layer insulating;
Reaction reagent layer is fixed on the inside and the outside of described circular arc contrast electrode;
After the described reaction reagent layer drying, above insulation course, paste one deck double faced adhesive tape (2), have the groove that forms by circular hole (7) and slot (8) on the described double faced adhesive tape;
On described double faced adhesive tape, cover one deck hydrophilic cover (1);
Be loaded with the double faced adhesive tape of described groove and described electrode plate and described hydrophilic cover and form sampling channel jointly;
Described circular working electrode passes described circular arc contrast electrode by a rectangular guideway.
Described circular working electrode and described circular arc contrast electrode can be made by a kind of mode in serigraphy, magnetron sputtering, the vacuum evaporation.
The material of described circular working electrode and described circular arc contrast electrode can be a kind of material in carbon, gold, silver, palladium, platinum, the tin indium oxide.
The material of described electrode plate can be a kind of material among PVC, PET, the PP.
Described insulation course is an insullac.
Beneficial effect of the present invention is that circular working electrode compares with square-shaped electrode of the prior art system, forms the reagent layer spot of symmetry, homogeneous, helps the stable operating voltage that is applied on the working electrode simultaneously, thereby improves the response reappearance of sensor.The groove that combines by circular hole and slot; Guarantee sample introduction quick and precisely and enlarged measured object and the conversion zone of electrode surface reagent layer and, response signal is strengthened as the active electrode area of signals collecting.
Description of drawings
Figure 1 shows that the making step synoptic diagram of electrochemica biological sensor of the present invention;
Figure 2 shows that the cut-open view of electrochemica biological sensor of the present invention;
Figure 3 shows that the blood sugar strip is to the response of glucose solution in the specific embodiments of the invention.
Embodiment
Describe the present invention in detail below in conjunction with accompanying drawing.
Be illustrated in figure 1 as the making step synoptic diagram of electrochemica biological sensor of the present invention;
As shown in Figure 2, the effect after electrochemica biological sensor of the present invention is implemented.
The circular working electrode 6 and the circular arc contrast electrode 5 that are indicated on a plastic plate 4, making as accompanying drawing 1, circular working electrode 6 is centered on by circular arc contrast electrode 5, and circular working electrode 6 passes through circular arc contrast electrode 5 by a guide rail.Used plastic plate 4 can be PVC plate, PET plate or PP plate; The generation of circular working electrode 6 and circular arc contrast electrode 5 can realize that electrode material can be carbon, gold, silver, palladium, platinum, tin indium oxide (ITO) etc. by technology such as screen printing technique, magnetron sputtering technique, vacuum evaporations.
Make after working electrode 6 and the contrast electrode 5, the employing screen printing technique covers the layer insulating 3 as being indicated in the accompanying drawing 1 on plastic plate 4.When covering insulation course 3, expose circular arc contrast electrode 5 with interior and peripheral a little zone to be used for the fixing and biological respinse of reagent, reagent layer symmetry, homogeneous; Expose the other end of circular working electrode 6 and circular arc contrast electrode 5 so that be connected with the signals collecting instrument.
At circular arc contrast electrode 5 with interior and peripheral a little regional fixation reaction reagent.Reaction reagent is made up of enzyme, electronic medium, buffer reagent, cellulose.Fix different enzymes according to the material that will detect is different, as the detection that is used for glucose then fixing glucose oxidase, the detection then fixedly cholesterin dehydrogenase and the cholesterol oxidase that are used for cholesterol.Electronic medium impels the biochemical reaction product at electrode surface generation electrochemical redox reaction, can be the potassium ferricyanide, ferrocene, tris (bipyridine) ruthenium etc.Reaction reagent can directly drip at circular arc contrast electrode 5 with inner region, or is added to this zone by means such as machine injections.Reaction reagent forms reagent layer through drying or toasting drying.
After the reagent layer drying, paste the double faced adhesive tape that is indicated as in the accompanying drawing 1.The groove that is combined by circular hole 7 and slot 8 is arranged on the double faced adhesive tape, and in the zone that the electrode reaction end exposes, the width of slot 8 is less than the diameter of circular hole 7 when covering insulation course 3 for the size of circular hole 7 and position, and slot 8 is connected with circular hole 7 and communicates.
On double faced adhesive tape, cover one deck hydrophilic plastic cover plate 1.
Electrode plate, double faced adhesive tape and hydrophilic cover constitute sample intake passage.
Use the method for this biology sensor to be: at first biology sensor is connected with the signals collecting instrument, the enabling signal detector, testing sample is incorporated into circular reaction zone automatically through square sample holes, the automatic detection of biological reaction signal of signal detecting and measuring apparatus.
Blood sugar strip with glucose in the detection blood is an example.
With the conductive carbon paste is electrode material, serigraphy is indicated in making as accompanying drawing 1 on the thick PP plate of 0.5mm circular working electrode 6 and circular arc contrast electrode 5.The diameter of working electrode 6 circular portions is 1.5mm, and the interior diameter of circular arc contrast electrode 5 is that 2.5mm, overall diameter are 3.5mm, and the electrode total length is 32mm.Behind the pole drying, the employing screen printing technique covers the layer insulating 3 as being indicated in the accompanying drawing 2 on plastic plate 4.
Drip 2 μ l and contain 20mg/ml K
3Fe (CN)
6, 100U/ml glucose oxidase, 1% cellulosic reaction reagent be in circular working electrode 6 surfaces, room temperature is dried the back and is constituted reaction reagent layer.
To be affixed on the electrode surface that contains reagent layer by thick double faced adhesive tape 2 as the 0.125mm that is indicated in the accompanying drawing 1.The diameter of circular hole 7 is 4mm on the double faced adhesive tape 2, and the width of the square opening that communicates with circular hole 7 is that 1.5mm, length are 6mm.
A thick PET plate of 0.2mm is covered on the double faced adhesive tape 2, obtain can be used for the electrochemica biological sensor-blood sugar strip of glucose concentration determination in the blood.
For using the measurement result of blood sugar strip to glucose solution, the blood sugar strip is 4 0mg/dl-600mg/dl to the linear response range of glucose solution, linearly dependent coefficient R as shown in Figure 3
2Greater than 0.99, show good linear relationship.
Embodiment of the present invention only is used to the present invention is described and non-limiting the present invention.
Claims (15)
1. an electrochemica biological sensor includes electrode plate (4), double faced adhesive tape (2) and hydrophilic cover (1), it is characterized in that:
(a) place circular working electrode (6) on the electrode plate;
(b) place circular arc contrast electrode (5) on the electrode plate;
(c) groove that has circular hole and slot to combine on the described double faced adhesive tape;
(d) be loaded with the double faced adhesive tape of described groove and described electrode plate and described hydrophilic cover and form sampling channel jointly;
(e) reaction reagent layer is fixed on the inside and the outside of described circular arc contrast electrode.
2. a kind of electrochemica biological sensor according to claim 1 is characterized in that, described circular working electrode passes described circular arc contrast electrode by a rectangular guideway.
3. a kind of electrochemica biological sensor according to claim 1 is characterized in that, described circular working electrode and described circular arc contrast electrode can be made by a kind of mode in serigraphy, magnetron sputtering, the vacuum evaporation.
4. a kind of electrochemica biological sensor according to claim 1 is characterized in that, the material of described circular working electrode and described circular arc contrast electrode can be a kind of material in carbon, gold, silver, palladium, platinum, the tin indium oxide.
5. a kind of electrochemica biological sensor according to claim 1 is characterized in that, the material of described electrode plate can be a kind of material among PVC, PET, the PP.
6. a kind of electrochemica biological sensor according to claim 1 is characterized in that, contains an insulation course between described double faced adhesive tape and described electrode base.
7. a kind of electrochemica biological sensor according to claim 6 is characterized in that described insulation course is an insullac.
8. method of making electrochemica biological sensor, described method comprise the following steps: to go up at electrode plate (4) makes circular working electrode (6) and circular arc contrast electrode (5),
On described electrode plate, cover a layer insulating;
Reaction reagent layer is fixed on the inside and the outside of described circular arc contrast electrode;
After the described reaction reagent layer drying, above insulation course, paste one deck double faced adhesive tape (2), have the groove that forms by circular hole (7) and slot (8) on the described double faced adhesive tape;
On described double faced adhesive tape, cover one deck hydrophilic cover (1);
Be loaded with the double faced adhesive tape of described groove and described electrode plate and described hydrophilic cover and form sampling channel jointly.
9. described according to Claim 8 method is characterized in that described circular working electrode passes described circular arc contrast electrode by a rectangular guideway.
10. method according to claim 8 is characterized in that, described circular working electrode and described circular arc contrast electrode are made by serigraphy.
11. method according to claim 8 is characterized in that, described circular working electrode and described circular arc contrast electrode are made by magnetron sputtering.
12. method according to claim 8 is characterized in that, described circular working electrode and described circular arc contrast electrode are made by vacuum evaporation.
13. method according to claim 8 is characterized in that, the material of described circular working electrode and described circular arc contrast electrode can be a kind of material in carbon, gold, silver, palladium, platinum, the tin indium oxide.
14. method according to claim 8 is characterized in that, the material of described electrode plate can be a kind of material among PVC, PET, the PP.
15. method according to claim 8 is characterized in that, described insulation course is an insullac.
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| CN 200410038359 CN1584575A (en) | 2004-05-24 | 2004-05-24 | Electrochemical biological sensor and preparing method thereof |
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| CN 200410038359 CN1584575A (en) | 2004-05-24 | 2004-05-24 | Electrochemical biological sensor and preparing method thereof |
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| CN101929977A (en) * | 2010-08-31 | 2010-12-29 | 刘丹 | Enzyme bioelectrochemical sensing chip and preparation and using methods thereof |
| CN101680753B (en) * | 2007-05-02 | 2012-07-18 | 弗莱克斯克工业有限公司 | Sensor device to monitor deformation in structural members, such as solid structures |
| CN102770756A (en) * | 2010-02-24 | 2012-11-07 | 导电技术股份有限公司 | Laminated electrochemical sensor with controlled variation of working electrode |
| CN103913501A (en) * | 2012-12-31 | 2014-07-09 | 北京师范大学 | Copper rapid determination method based on differential pulse voltammetry and three-electrode sensor |
| CN103913502A (en) * | 2012-12-31 | 2014-07-09 | 北京师范大学 | Copper rapid determination method based on square-wave stripping voltammetry and three-electrode sensor |
| CN103913489A (en) * | 2013-01-09 | 2014-07-09 | 北京怡成生物电子技术有限公司 | Micro biochip for real-time detection of substances in body fluids |
| WO2014108087A1 (en) * | 2013-01-09 | 2014-07-17 | 北京怡成生物电子技术有限公司 | Portable monitoring system for dynamically and continuously measuring analyte in body liquid |
| CN103932718A (en) * | 2013-01-17 | 2014-07-23 | 北京怡成生物电子技术有限公司 | Portable monitoring system for dynamically and continuously measuring analyte in body fluid |
| CN104122386A (en) * | 2014-08-14 | 2014-10-29 | 深圳市国赛生物技术有限公司 | Sensor array chip |
| CN107917942A (en) * | 2016-10-11 | 2018-04-17 | 广州好芝生物科技有限公司 | A kind of electrode system and strip and instrument containing the electrode system |
| WO2018068378A1 (en) * | 2016-10-11 | 2018-04-19 | 广州好芝生物科技有限公司 | Electrode system, and test strip and instrument comprising same |
| CN108732211A (en) * | 2017-04-18 | 2018-11-02 | 中山大学 | Solution property sensor and method for manufacturing the same |
| CN108802127A (en) * | 2018-05-03 | 2018-11-13 | 佛山科学技术学院 | A kind of removable electrochemical sensor |
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| CN113820375A (en) * | 2021-08-30 | 2021-12-21 | 杭州微策生物技术股份有限公司 | Electrochemical sensor for measuring selected characteristic substances in body fluid and preparation method |
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| CN101680753B (en) * | 2007-05-02 | 2012-07-18 | 弗莱克斯克工业有限公司 | Sensor device to monitor deformation in structural members, such as solid structures |
| CN102770756A (en) * | 2010-02-24 | 2012-11-07 | 导电技术股份有限公司 | Laminated electrochemical sensor with controlled variation of working electrode |
| CN102770756B (en) * | 2010-02-24 | 2014-08-20 | 导电技术股份有限公司 | Laminated electrochemical sensor with controlled variation of working electrode |
| CN101929977A (en) * | 2010-08-31 | 2010-12-29 | 刘丹 | Enzyme bioelectrochemical sensing chip and preparation and using methods thereof |
| CN103913501A (en) * | 2012-12-31 | 2014-07-09 | 北京师范大学 | Copper rapid determination method based on differential pulse voltammetry and three-electrode sensor |
| CN103913502A (en) * | 2012-12-31 | 2014-07-09 | 北京师范大学 | Copper rapid determination method based on square-wave stripping voltammetry and three-electrode sensor |
| CN103913501B (en) * | 2012-12-31 | 2018-01-26 | 北京师范大学 | A method for rapid determination of copper based on differential pulse voltammetry and three-electrode sensor |
| CN103913502B (en) * | 2012-12-31 | 2017-12-26 | 北京师范大学 | The method for quickly determining copper based on square wave stripping voltammetry and three electrode sensors |
| CN103913489A (en) * | 2013-01-09 | 2014-07-09 | 北京怡成生物电子技术有限公司 | Micro biochip for real-time detection of substances in body fluids |
| WO2014108082A1 (en) * | 2013-01-09 | 2014-07-17 | 北京怡成生物电子技术有限公司 | Micro biochip for real time measurement of matters in body fluid |
| WO2014108087A1 (en) * | 2013-01-09 | 2014-07-17 | 北京怡成生物电子技术有限公司 | Portable monitoring system for dynamically and continuously measuring analyte in body liquid |
| CN103913489B (en) * | 2013-01-09 | 2015-06-10 | 北京怡成生物电子技术股份有限公司 | Micro biochip for real-time detection of substances in body fluids |
| CN103932718B (en) * | 2013-01-17 | 2015-12-02 | 北京怡成生物电子技术股份有限公司 | The portable monitoring system of thing is analyzed in dynamic METHOD FOR CONTINUOUS DETERMINATION body fluid |
| CN103932718A (en) * | 2013-01-17 | 2014-07-23 | 北京怡成生物电子技术有限公司 | Portable monitoring system for dynamically and continuously measuring analyte in body fluid |
| CN104122386A (en) * | 2014-08-14 | 2014-10-29 | 深圳市国赛生物技术有限公司 | Sensor array chip |
| CN107917942A (en) * | 2016-10-11 | 2018-04-17 | 广州好芝生物科技有限公司 | A kind of electrode system and strip and instrument containing the electrode system |
| WO2018068378A1 (en) * | 2016-10-11 | 2018-04-19 | 广州好芝生物科技有限公司 | Electrode system, and test strip and instrument comprising same |
| CN108732211A (en) * | 2017-04-18 | 2018-11-02 | 中山大学 | Solution property sensor and method for manufacturing the same |
| CN108802127A (en) * | 2018-05-03 | 2018-11-13 | 佛山科学技术学院 | A kind of removable electrochemical sensor |
| CN108802127B (en) * | 2018-05-03 | 2020-07-07 | 佛山科学技术学院 | A detachable electrochemical sensor |
| CN109655507A (en) * | 2019-01-16 | 2019-04-19 | 威海纽普生物技术有限公司 | Detect the electrochemical detecting reagent box and preparation method thereof of cardiac muscle troponin I |
| CN109655507B (en) * | 2019-01-16 | 2020-11-24 | 威海纽普生物技术有限公司 | Electrochemical detection kit for detecting cardiac troponin I and preparation method thereof |
| CN113820375A (en) * | 2021-08-30 | 2021-12-21 | 杭州微策生物技术股份有限公司 | Electrochemical sensor for measuring selected characteristic substances in body fluid and preparation method |
| CN113820375B (en) * | 2021-08-30 | 2024-06-25 | 杭州微策生物技术股份有限公司 | Electrochemical sensor for measuring selected characteristic substances in body fluid and preparation method thereof |
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