WO2020166762A1 - 소변을 이용하여 검출 가능한 바이오 전자센서 - Google Patents
소변을 이용하여 검출 가능한 바이오 전자센서 Download PDFInfo
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- WO2020166762A1 WO2020166762A1 PCT/KR2019/006304 KR2019006304W WO2020166762A1 WO 2020166762 A1 WO2020166762 A1 WO 2020166762A1 KR 2019006304 W KR2019006304 W KR 2019006304W WO 2020166762 A1 WO2020166762 A1 WO 2020166762A1
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- urine
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- enzyme layer
- enzyme
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
- A61B5/1486—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using enzyme electrodes, e.g. with immobilised oxidase
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/0045—Devices for taking samples of body liquids
- A61B10/007—Devices for taking samples of body liquids for taking urine samples
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
- A61B2562/12—Manufacturing methods specially adapted for producing sensors for in-vivo measurements
Definitions
- the present invention is a bio-electronic sensor using urine that can be quantitatively analyzed through an electrochemical analysis method using urine to relieve the inconvenience of blood collection, a bio-electronic sensor that measures sugar using urine, and a ketone body using urine. It relates to a bioelectronic sensor that measures.
- Diabetes is a disease characterized by high blood sugar due to abnormal insulin action, and the number of diabetic patients in Korea is on the rise recently and is one of the chronic diseases. Diabetes patients are not only difficult to cure, but also a typical disease that causes acute complications or complications related to damage to human tissues. Diabetes patients need constant blood sugar management to prevent various complications, and the amount of glucose should be measured periodically. In particular, when hypoglycemia occurs, cardiovascular disease occurs due to shock or decreased consciousness in severe cases, which can lead to death. This requires considerable attention even in daily life.
- Blood glucose levels that indicate blood glucose information can be largely classified into invasive and colorimetric methods.
- the invasive method consists of a blood sugar device, a test strip on which blood is placed, and a blood collection device used to collect blood. In general, a small amount of blood is collected from the capillaries of the fingertips, and blood is buried on the test strip for measurement.
- the test strip is a method of detecting blood sugar by placing an enzyme that reacts with blood sugar in the blood to cause an electrochemical reaction.
- the colorimetric method uses a urine strip, and the blood sugar can be determined by the color that changes after urine is buried on a urine strip.
- ketone bodies are used in cells other than liver and red blood cells as a fuel to replace glucose by breaking down fat when glucose cannot be used as energy or when the glucose concentration in the body is extremely reduced.
- the invasive blood sugar device can be used for a long time, but since the test strip and the blood collection device are disposable, diabetics suffer from economic difficulties in managing blood sugar.
- the blood sampler used at this time measures blood sugar by collecting blood from a part of the body with a tool such as a small lancet. Blood collection is a pain for the patient, and there is a risk of infection medically.
- the colorimetric method using a urine strip is difficult to qualitatively and quantitatively represent the color change due to inaccuracies such as pretreatment, color development time, urine amount and reaction time.
- bioelectronics that can quantitatively measure urine sugar and ketone bodies using an electrochemical analysis method to measure urine sugar and ketone bodies without pain of blood collection, and to compensate for inaccuracy and difficulty in quantitative analysis of urine strips. Research on the sensor is needed.
- An object of the present invention is to provide a bioelectronic sensor using urine. More specifically, it is to provide a sensor capable of quantitative measurement by an electrochemical method by generating an electrode part using an enzyme.
- Another object of the present invention is to provide a bioelectronic sensor capable of measuring sugar using urine.
- it relates to quantitative measurement of glucose components in urine, and provides a sensor that measures glucose multiple times without affecting interfering substances contained other than glucose components in urine.
- Another object of the present invention is to provide a bioelectronic sensor capable of measuring ketone bodies using urine.
- it relates to quantitative measurement of ketone bodies in urine, and provides a sensor that measures multiple times by using a ketone body as one sensor without affecting interfering substances contained other than the ketone body component in urine.
- a bioelectronic sensor using urine includes a substrate; An electrode portion disposed on the substrate; And a connection part for applying current and voltage to the electrode part, wherein the electrode part comprises: an electrode layer including a metal electrode attached to the substrate; A first enzyme layer fixed on the electrode layer; And a second enzyme layer fixed on the first enzyme layer.
- the substrate is a printed circuit board (PCB).
- PCB printed circuit board
- the metal electrode is composed of a working electrode, a counter electrode, and a reference electrode.
- the metal electrode includes platinum (Pt), gold (Au), cadmium (Cd), silver (Ag), lead (Pb), and nickel (Ni).
- the bioelectronic sensor using urine can be measured by an electrochemical method.
- a bioelectronic sensor for measuring sugar using urine includes: a substrate; An electrode portion disposed on the substrate; And a connection part for applying current and voltage to the electrode part, wherein the electrode part comprises: an electrode layer including a metal electrode attached to the substrate; A first enzyme layer fixed on the electrode layer; And a second enzyme layer immobilized on the first enzyme layer, wherein the first enzyme layer includes glucose oxidase, and the second enzyme layer includes ascorbate oxidase.
- the substrate is a PCB.
- the metal electrode is composed of a working electrode, a counter electrode, and a reference electrode.
- the metal electrode includes platinum (Pt), gold (Au), cadmium (Cd), silver (Ag), lead (Pb), and nickel (Ni).
- the bioelectronic sensor for measuring sugar using urine can be measured by an electrochemical method.
- a method of manufacturing a bioelectronic sensor for measuring sugar using urine includes: preparing a substrate; Preparing a metal electrode; Attaching a metal electrode on the substrate; Fixing a first enzyme layer on the metal electrode; Drying the first enzyme layer; Fixing a second enzyme layer on the first enzyme layer; And drying the second enzyme layer, wherein the first enzyme layer contains glucose oxidase, and the second enzyme layer contains ascorbate oxidase.
- the substrate is a PCB.
- the metal electrode is composed of a working electrode, a counter electrode, and a reference electrode.
- the metal electrode includes platinum (Pt), gold (Au), cadmium (Cd), silver (Ag), lead (Pb), and nickel (Ni).
- Fixing the first enzyme layer on the metal electrode includes coating a mixed solution containing glucose oxidase and GA (Glutaldehyde) on the metal electrode.
- Drying the first enzyme layer includes a step of including a drying time of 30 minutes or more at a temperature of 35°C to 40°C.
- the step of fixing the second enzyme layer on the metal electrode includes coating a mixed solution containing ascorbate oxidase and GA on the first enzyme layer.
- Drying the second enzyme layer includes a step of including a drying time of 30 minutes or more at a temperature of 35°C to 40°C.
- a bio-electronic sensor for measuring ketone bodies using urine includes: a substrate; An electrode portion disposed on the substrate; And a connection part for applying current and voltage to the electrode part, wherein the electrode part comprises: an electrode layer including a metal electrode attached to the substrate; A first enzyme layer fixed on the electrode layer; And a second enzyme layer immobilized on the first enzyme layer, wherein the first enzyme layer includes an enzyme HBDH (D-beta-hydroxybutyrate dehydrogenase) and a coenzyme NAD (Nicotinamide Adenine Dinucleotide), and the second The enzyme layer contains the enzyme HBDH and the coenzyme NADH (Nicotinamide Adenine Dinucleotide).
- the substrate is a PCB.
- the metal electrode is composed of a working electrode, a counter electrode, and a reference electrode.
- the metal electrode includes platinum (Pt), gold (Au), cadmium (Cd), silver (Ag), lead (Pb), and nickel (Ni).
- the bioelectronic sensor for measuring ketone bodies using urine can be measured by an electrochemical method
- a method of manufacturing a bioelectronic sensor for measuring ketone bodies using urine includes: preparing a substrate; Preparing a metal electrode; Attaching a metal electrode on the substrate; Fixing a first enzyme layer on the metal electrode; Drying the first enzyme layer; Fixing a second enzyme layer on the first enzyme layer; And drying the second enzyme layer, wherein the first enzyme layer includes the enzyme HBDH and the coenzyme NAD, and the second enzyme layer includes the enzyme HBDH and the coenzyme NADH.
- the substrate is a PCB.
- the metal electrode is composed of a working electrode, a counter electrode, and a reference electrode.
- the metal electrode includes platinum (Pt), gold (Au), cadmium (Cd), silver (Ag), lead (Pb), and nickel (Ni).
- the step of fixing the first enzyme layer includes coating a mixed solution containing the enzyme HBDH, coenzymes NAD, and GA on the metal electrode.
- Drying the first enzyme layer includes a step of including a drying time of 30 minutes or more at a temperature of 35°C to 40°C.
- the step of fixing the second enzyme layer includes coating a mixed solution containing the enzyme HBDH, coenzymes NADH, and GA on the first enzyme layer.
- Drying the second enzyme layer includes a step of including a drying time of 30 minutes or more at a temperature of 35°C to 40°C.
- the present invention provides a bioelectronic sensor using urine, so that it can be measured simply using urine without pain of blood collection compared to the prior art, and it is possible to measure multiple times without affecting interfering substances included in addition to glucose and ketone components in urine.
- FIG. 1 is a diagram schematically illustrating the structure of a bioelectronic sensor using urine of the present invention.
- FIG. 2 is a schematic diagram of a metal electrode of an electrode part of a bioelectronic sensor using urine of the present invention.
- FIG. 3 is a diagram schematically illustrating the structure of an electrode part of a bioelectronic sensor measuring sugar using urine of the present invention.
- FIG. 4 is a flow chart of a method of manufacturing a bio-electronic sensor for measuring sugar and a bio-electronic sensor for measuring a ketone body using urine of the present invention.
- FIG. 5 is a diagram schematically illustrating the structure of an electrode part of a bioelectronic sensor measuring ketone bodies using urine of the present invention.
- FIG. 6 is a diagram showing a result of measuring glucose by concentration using a bioelectronic sensor measuring sugar using urine of the present invention.
- FIG. 7 is a diagram showing a result of the effect of an interfering substance of an electrode using a bioelectronic sensor measuring sugar using urine of the present invention.
- FIG. 8 is a view showing the result of the change in current flow according to the ACAC (Acetoacetate) concentration using the bioelectronic sensor for measuring ketone bodies using urine of the present invention.
- FIG. 9 is a view showing the result of comparing the correlation between the current and ACAC concentration measured using the bioelectronic sensor for measuring ketone bodies using urine of the present invention.
- a bioelectronic sensor using urine includes: a substrate; An electrode portion disposed on the substrate; And a connection part for applying current and voltage to the electrode part, wherein the electrode part comprises: an electrode layer including a metal electrode attached to the substrate; A first enzyme layer fixed on the electrode layer; And a second enzyme layer immobilized on the first enzyme layer.
- FIG. 1 shows a schematic diagram of the structure of a bioelectronic sensor using urine of the present invention.
- the substrate of the bioelectronic sensor using urine is a PCB, and another substrate capable of passing current may be used.
- FIG. 2 shows a schematic view of a metal electrode of an electrode part of a bioelectronic sensor using urine of the present invention.
- the metal electrode is composed of a working electrode, a counter electrode, and a reference electrode, and the metal electrode is platinum (Pt), gold (Au), cadmium (Cd), silver (Ag), lead (Pb), nickel ( In general, a material containing Ni) and capable of flowing electric current and exchanging electrons with molecules can be used, and platinum (Pt) is preferred.
- the bioelectronic sensor using urine can be measured by an electrochemical method.
- a bioelectronic sensor for measuring sugar using urine includes: a substrate; An electrode portion disposed on the substrate; And a connection part for applying current and voltage to the electrode part, wherein the electrode part comprises: an electrode layer including a metal electrode attached to the substrate; A first enzyme layer fixed on the electrode layer; And a second enzyme layer immobilized on the first enzyme layer, wherein the first enzyme layer includes glucose oxidase, and the second enzyme layer includes ascorbate oxidase.
- FIG. 3 is a diagram illustrating a structure of an electrode part of a bioelectronic sensor that measures sugar using urine.
- the substrate is a PCB, and another substrate capable of passing current may be used.
- the metal electrode consists of a working electrode, a counter electrode, and a reference electrode, and the metal electrode contains platinum (Pt), gold (Au), cadmium (Cd), silver (Ag), lead (Pb), and nickel (Ni).
- platinum (Pt) is preferred.
- the electrode part two layers of enzyme multilayers are created on the electrode layer, so that sugar can be measured using urine without being disturbed by interfering substances in urine.
- glucose oxidase was used as an example to measure glucose, which is urine glucose.
- glucose oxidase in urine reacts with glucose oxidase to become gluconic acid and release electrons.
- Glucose can be detected by measuring the emitted electrons with an electrode.
- the second enzyme layer includes uric acid, ascorbic acid, and acetaminophen, which are representative interfering substances in urine.
- ascorbate oxidase is used as an example. Was used.
- ascorbic acid is oxidized to dehydroascorbic acid by ascorbate oxidase, which cannot be oxidized on the electrode surface, and electrode activation is lost, so that glucose reaction is not disturbed.
- a glucose oxidase layer on an electrode having a simple structure and an ascorbate oxidase layer on the glucose oxidase layer are prepared to measure sugar using urine, and an electrode that does not react with interfering substances can be prepared.
- the bioelectronic sensor for measuring sugar using urine can be measured by an electrochemical method.
- a method of manufacturing a bioelectronic sensor for measuring sugar using urine includes: preparing a substrate; Preparing a metal electrode; Attaching a metal electrode on the substrate; Fixing a first enzyme layer on the metal electrode; Drying the first enzyme layer; Fixing a second enzyme layer on the first enzyme layer; And drying the second enzyme layer, wherein the first enzyme layer contains glucose oxidase, and the second enzyme layer contains ascorbate oxidase.
- Figure 4 shows a flow chart of a method of manufacturing a bio-electronic sensor for measuring sugar using urine and a bio-electronic sensor for measuring a ketone body using urine of the present invention.
- preparing a substrate (S310), preparing a metal electrode (S320), attaching a metal electrode on the substrate (S330), fixing a first enzyme layer on the metal electrode Step (S340), drying the first enzyme layer (S350), fixing a second enzyme layer on the first enzyme layer (S360), and drying the second enzyme layer (S370) Includes.
- step S 310 a substrate is prepared.
- the substrate is a PCB, and another substrate capable of passing current may be used.
- a metal electrode is prepared.
- the metal electrode consists of a working electrode, a counter electrode, and a reference electrode.
- the working electrode is circular and its diameter is about 1.3mm, and the counter electrode and the reference electrode each surround the working electrode. There are no restrictions on the shape and size of the working electrode, counter electrode, and reference electrode.
- the metal electrode includes platinum (Pt), gold (Au), cadmium (Cd), silver (Ag), lead (Pb), nickel (Ni), and generally allows current to flow and provides electron exchange with molecules. Materials that can be received are available, and platinum (Pt) is preferred.
- step S 310 and step S 320 are irrelevant to each other and may be performed at the same time.
- step S330 a metal electrode is attached to the substrate.
- the first enzyme layer is fixed on the metal electrode.
- the first enzyme layer used glucose oxidase as an example for measuring glucose, which is urine glucose in urine. Glucose in urine reacts with glucose oxidase to become gluconic acid and release electrons. Glucose can be detected by measuring the emitted electrons with an electrode.
- Glucose oxidase and GA were mixed to fix the metal electrode and the first enzyme layer.
- the mixture is coated on a metal electrode.
- step S 350 the first enzyme layer is dried. Dry sufficiently for 30 minutes or more at a temperature of 35°C to 40°C.
- the second enzyme layer is fixed on the first enzyme layer.
- the second enzyme layer is a layer for filtering uric acid, ascorbic acid, acetaminophen, etc., which are representative interfering substances in urine, and ascorbate oxidase is used as an example.
- ascorbic acid is oxidized to dihydrohascorbic acid by ascorbate oxidase, which cannot be oxidized on the electrode surface, and electrode activation is lost, so that glucose reaction is not disturbed.
- Ascorbate oxidase and GA were mixed to fix the first and second enzyme layers. The mixture is coated on the first enzyme layer.
- step S370 the second enzyme layer is dried. Dry sufficiently for 30 minutes or more at a temperature of 35°C to 40°C.
- a bio-electronic sensor for measuring ketone bodies using urine includes: a substrate; An electrode portion disposed on the substrate; And a connection part for applying current and voltage to the electrode part, wherein the electrode part comprises: an electrode layer including a metal electrode attached to the substrate; A first enzyme layer fixed on the electrode layer; And a second enzyme layer immobilized on the first enzyme layer, wherein the first enzyme layer includes enzymes HBDH and coenzyme NAD, and the second enzyme layer includes enzymes HBDH and coenzyme NADH.
- FIG. 5 shows a schematic diagram of the structure of an electrode part of a bioelectronic sensor for measuring ketone bodies using urine of the present invention.
- the substrate is a PCB, and another substrate capable of passing current may be used.
- the metal electrode consists of a working electrode, a counter electrode, and a reference electrode, and the metal electrode contains platinum (Pt), gold (Au), cadmium (Cd), silver (Ag), lead (Pb), and nickel (Ni).
- platinum (Pt) is preferred.
- the electrode part two layers of enzyme multilayers are created on the electrode layer, so that sugar can be measured using urine without being disturbed by interfering substances in urine.
- Ketone bodies in urination exist in the form of ACAC.
- ACAC combines with the coenzyme NADH and the enzyme HBDH to produce 3HB and NAD + .
- the reaction formula for the reaction is shown in Reaction Scheme 2 below.
- a layer of enzyme HBDH and coenzyme NAD on a simple structure electrode, and a layer of enzyme HBDH and coenzyme NADH on the enzyme HBDH and coenzyme NAD layer can be used to measure ketone bodies using urine. Can be produced.
- the bioelectronic sensor that measures ketone bodies using urine can be measured by an electrochemical method.
- a method of manufacturing a bioelectronic sensor for measuring ketone bodies using urine includes: preparing a substrate; Preparing a metal electrode; Attaching a metal electrode on the substrate; Fixing a first enzyme layer on the metal electrode; Drying the first enzyme layer; Fixing a second enzyme layer on the first enzyme layer; And drying the second enzyme layer, wherein the first enzyme layer includes the enzyme HBDH and the coenzyme NAD, and the second enzyme layer includes the enzyme HBDH and the coenzyme NADH.
- Figure 4 shows a flow chart of a method of manufacturing a bio-electronic sensor for measuring sugar using urine and a bio-electronic sensor for measuring a ketone body using urine of the present invention.
- preparing a substrate (S310), preparing a metal electrode (S320), attaching a metal electrode on the substrate (S330), fixing a first enzyme layer on the metal electrode Step (S340), drying the first enzyme layer (S350), fixing a second enzyme layer on the first enzyme layer (S360), and drying the second enzyme layer (S370) Includes.
- preparing a substrate (S310), preparing a metal electrode (S320), attaching a metal electrode on the substrate (S330), fixing a first enzyme layer on the metal electrode Step (S340), drying the first enzyme layer (S350), fixing a second enzyme layer on the first enzyme layer (S360), and drying the second enzyme layer (S370) Includes.
- step S 310 a substrate is prepared.
- the substrate is a PCB, and another substrate capable of passing current may be used.
- a metal electrode is prepared.
- the metal electrode consists of a working electrode, a counter electrode, and a reference electrode.
- the working electrode is circular and its diameter is about 1.3mm, and the counter electrode and the reference electrode each surround the working electrode. There are no restrictions on the shape and size of the working electrode, counter electrode, and reference electrode.
- the metal electrode includes platinum (Pt), gold (Au), cadmium (Cd), silver (Ag), lead (Pb), nickel (Ni), and generally allows current to flow and provides electron exchange with molecules. Materials that can be received are available, and platinum (Pt) is preferred.
- step S 310 and step S 320 are irrelevant to each other and may be performed at the same time.
- step S330 a metal electrode is attached to the substrate.
- the first enzyme layer is fixed on the metal electrode.
- the first enzyme layer used the enzyme HBDH and the coenzyme NAD as an example for measuring ACAC, which is a ketone in urine.
- ACAC is decomposed into 3HD and NAD + and reacts with the first enzyme layer to form ACAC and its product H + .
- the ketone body can be quantitatively measured.
- Enzymes HBDH, coenzymes NAD and GA are mixed to fix the metal electrode and the first enzyme layer.
- the mixture is coated on a metal electrode.
- step S 350 the first enzyme layer is dried. Dry sufficiently for 30 minutes or more at a temperature of 35°C to 40°C.
- the second enzyme layer is fixed on the first enzyme layer.
- the second enzyme layer is a layer that degrades ACAC, a ketone in urine, and as an example, the enzymes HBDH and the coenzyme NADH were used.
- ACAC meets the enzyme HBDH and the coenzyme NADH, ACAC is decomposed into 3HB and NAD + .
- Enzymes HBDH and coenzymes NADH and GA are mixed to immobilize the first and second enzyme layers.
- the mixture is coated on the first enzyme layer.
- step S370 the second enzyme layer is dried. Dry sufficiently for 30 minutes or more at a temperature of 35°C to 40°C.
- Bio-electronic sensor that measures sugar using urine
- each chip On each chip, three Pt electrodes are fabricated on a 6-inch quartz wafer using a common semiconductor manufacturing process. Each chip consists of a working electrode, a counter electrode, and a reference electrode. Each chip is connected by wire wires on a custom PCB board.
- the surface of the Pt electrode is washed with acetone solvent, isopropanol, and ethyl alcohol to remove dirt, organic substances, and inorganic substances present on the surface before the enzyme layer is coated. After washing the surface of the Pt electrode, the enzyme layer is immobilized on the surface.
- the chip is washed with oxygen plasma to prepare a Pt-GOx (Pt-glucose oxidase) electrode, and then treated with GA and bovine serum albumin (BSA) to form cross-links with enzymes.
- Pt-GOx Pt-glucose oxidase
- BSA bovine serum albumin
- Glucose oxidase 5mg/mL in PBS
- GA solution 0.5% GA in DW and 56.25mg/mL BSA in PBS
- the mixed glucose oxidase and GA solution was coated on the Pt electrode.
- the coated first enzyme layer crystallizes within 5 minutes. Leave it to stand for 30 minutes or more in an oven at 35°C to 40°C.
- ascorbate oxidase (1 mg/mL in PBS) was dissolved in a GA solution (0.5% GA in DW and 56.25 mg/mL BSA in PBS). Let it. The mixed ascorbate oxidase and GA solution were coated on the Pt electrode. The coated second enzyme layer crystallizes within 5 minutes. Leave it to stand for 30 minutes or more in an oven at 35°C to 40°C.
- FIG. 6 is a diagram showing a result of measuring glucose by concentration using a bio-electronic sensor measuring sugar using urine of the present invention.
- FIG. 7 shows a diagram showing the result of the effect of an interfering substance of an electrode using a bioelectronic sensor measuring sugar using urine of the present invention.
- the current values of the mixture of the interfering substance and the glucose concentration of 250 mg/dl and the Pt-GOx-AOx electrodes of glucose 250 mg/dl are similar. This means that the Pt-GOx-AOx electrode blocks interfering substances and only measures the concentration of glucose.
- Each chip consists of a working electrode, a counter electrode, and a reference electrode. Each chip is connected by wire wires on a custom PCB board.
- the surface of the electrode is washed with acetone solvent, isopropanol and ethyl alcohol to remove dirt, organic and inorganic substances present on the surface before the enzyme layer is coated. After washing the electrode surface, the enzyme layer is immobilized on the surface.
- a mixed solution of the enzyme HBDH and the coenzyme NAD is prepared to prepare a mixed layer of the enzyme HBDH and the coenzyme NAD on the electrode.
- NAD was prepared at a concentration of 0.32mg/mL in PBS and diluted to the same volume.
- An enzyme mixture solution was prepared by mixing the same volume of BSA (5.7mg/mL in PBS) with the diluted solution.
- the enzyme mixture solution and GA solution (0.5% GA in DW) were diluted to the same volume and coated on the Pt electrode.
- the coated first enzyme layer crystallizes within 5 minutes. Leave it to stand for 30 minutes or more in an oven at 35°C to 40°C.
- a mixed solution of the enzyme HBDH and the coenzyme NADH was prepared to prepare a mixed layer of the enzyme HBDH and the coenzyme NADH as the second enzyme layer on the prepared Pt-NAD+HBDH electrode.
- HBDH 0.02mg/mL in PBS and NADH 0.32mg/mL in PBS were prepared and diluted to the same volume.
- An enzyme mixture solution was prepared by mixing the same volume of BSA (5.7mg/mL in PBS) with the diluted solution.
- the enzyme mixture solution and GA solution (0.5% GA in DW) are diluted to the same volume and coated on the Pt-NAD+HBDH electrode.
- the coated second enzyme layer crystallizes within 5 minutes. Let stand for 30 minutes or longer in an oven at 35°C-40°C
- FIG. 8 is a view showing the result of the amount of change in the current flow according to the ACAC concentration using the bioelectronic sensor for measuring ketone bodies using urine of the present invention.
- the current value increases for each concentration, and it can be seen that the %CV value is in the range of 1% to 6% as a result of each measurement three times according to the concentration.
- ACAC concentration 0mg/dl, 6.25mg/dl, 12.5mg on Pt-NAD+HBDH-NADH+HBDH electrode designed to compare the correlation between ACAC concentration and current measured in Pt-NAD+HBDH-NADH+HBDH electrode
- the concentration of each ACAC sample was compared using the formula.
- FIG. 9 is a view showing the result of comparing the correlation between the current and ACAC concentration measured using the bio-electronic sensor for measuring ketone bodies using urine of the present invention.
- a value of the current-concentration ratio R2 of the converted Pt-NAD+HBDH-NADH+HBDH electrode can be very close to 1. This means that the Pt-NAD+HBDH-NADH+HBDH electrode blocks interfering substances and only measures the concentration of H + .
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Abstract
Description
Claims (31)
- 기판;상기 기판 상에 배치된 전극부; 및상기 전극부에 전류 및 전압을 인가하는 연결부를 포함하고,상기 전극부는,상기 기판 상에 부착된 금속 전극을 포함하는 전극 층;상기 전극층 상에 고정된 제1효소 층; 및상기 제1효소 층 상에 고정된 제2효소 층을 포함하는,소변을 이용한 바이오 전자센서.
- 제1항에 있어서,상기 기판은 PCB(Printed circuit board)인,소변을 이용한 바이오 전자센서.
- 제1항에 있어서,상기 금속 전극은 Working electrode, Counter electrode, Reference electrode로 구성된,소변을 이용한 바이오 전자센서.
- 제1항에 있어서,상기 금속 전극은 백금(Pt), 금(Au), 카드뮴(Cd), 은(Ag), 납(Pb), 니켈(Ni)을 포함하는,소변을 이용하는 바이오 전자센서.
- 제 1항에 있어서,상기 소변을 이용한 바이오 전자센서는 전기화학적 방식으로 측정가능한소변을 이용한 바이오 전자센서.
- 기판;상기 기판 상에 배치된 전극부; 및상기 전극부에 전류 및 전압을 인가하는 연결부를 포함하고,상기 전극부는,상기 기판 상에 부착된 금속 전극을 포함하는 전극 층;상기 전극층 상에 고정된 제1효소 층; 및상기 제1효소 층 상에 고정된 제2효소 층을 포함하고,상기 제1효소 층은 글루코스 산화효소를 포함하며,상기 제2효소 층은 아스코르베이트 산화효소를 포함하는,소변을 이용하여 당을 측정하는 바이오 전자센서.
- 제6항에 있어서,상기 기판은 PCB인,소변을 이용하여 당을 측정하는 바이오 전자센서.
- 제6항에 있어서,상기 금속 전극은 Working electrode, Counter electrode, Reference electrode로 구성된,소변을 이용하여 당을 측정하는 바이오 전자센서.
- 제6항에 있어서,상기 금속 전극은 백금(Pt), 금(Au), 카드뮴(Cd), 은(Ag), 납(Pb), 니켈(Ni)을 포함하는,소변을 이용하여 당을 측정하는 바이오 전자센서.
- 제 6항에 있어서,상기 소변을 이용하여 당을 측정하는 바이오 전자센서는 전기화학적 방식으로 측정가능한소변을 이용하여 당을 측정하는 바이오 전자센서.
- 기판을 준비하는 단계;금속 전극을 준비하는 단계;상기 기판 상에 금속 전극을 부착하는 단계;상기 금속 전극 상에 제1효소 층을 고정하는 단계;상기 제1효소 층을 건조하는 단계;상기 제1효소 층 상에 제2효소 층을 고정하는 단계; 및상기 제2효소 층을 건조하는 단계를 포함하고,상기 제1효소 층은 글루코스 산화효소를 포함하며,상기 제2효소 층은 아스코르베이트 산화효소를 포함하는,소변을 이용하여 당을 측정하는 바이오 전자센서를 제조하는 방법.
- 제11항에 있어서,상기 기판은 PCB인,소변을 이용하여 당을 측정하는 바이오 전자센서를 제조하는 방법.
- 제11항에 있어서,상기 금속 전극은 Working electrode, Counter electrode, Reference electrode로 구성된,소변을 이용하여 당을 측정하는 바이오 전자센서를 제조하는 방법.
- 제11항에 있어서,상기 금속 전극은 백금(Pt), 금(Au), 카드뮴(Cd), 은(Ag), 납(Pb), 니켈(Ni)을 포함하는,소변을 이용하여 당을 측정하는 바이오 전자센서를 제조하는 방법.
- 제11항에 있어서,상기 금속 전극 상에 제1효소 층을 고정하는 단계는,글루코스 산화효소와 GA(Glutaraldehyde)를 포함하는 혼합용액을 상기 금속 전극 상에 코팅하는 단계를 포함하는,소변을 이용하여 당을 측정하는 바이오 전자센서를 제조하는 방법.
- 제11항에 있어서,상기 제1효소 층을 건조하는 단계는,35℃ 내지 40℃의 온도에서 30분 이상의 건조시간을 포함하는 단계를 포함하는,소변을 이용하여 당을 측정하는 바이오 전자센서를 제조하는 방법.
- 제11항에 있어서,상기 금속 전극 상에 제2효소 층을 고정하는 단계는,아스코르베이트 산화효소와 GA를 포함하는 혼합 용액을 상기 제1효소 층 상에 코팅하는 단계를 포함하는,소변을 이용하여 당을 측정하는 바이오 전자센서를 제조하는 방법.
- 제11항에 있어서,상기 제2효소 층을 건조하는 단계는,35℃ 내지 40℃의 온도에서 30분 이상의 건조시간을 포함하는 단계를 포함하는,소변을 이용하여 당을 측정하는 바이오 전자센서를 제조하는 방법.
- 기판;상기 기판 상에 배치된 전극부; 및상기 전극부에 전류 및 전압을 인가하는 연결부를 포함하고,상기 전극부는,상기 기판 상에 부착된 금속 전극을 포함하는 전극 층;상기 전극층 상에 고정된 제1효소 층; 및상기 제1효소 층 상에 고정된 제2효소 층을 포함하고,상기 제1효소 층은 효소 HBDH(D-beta-hydroxybutyrate dehydrogenase) 및 보조효소 NAD(Nicotinamide Adenine Dinucleotide)를 포함하며,상기 제2효소 층은 효소 HBDH 및 보조효소 NADH(Nicotinamide Adenine Dinucleotide)를 포함하는,소변을 이용하여 케톤체을 측정하는 바이오 전자센서.
- 제19항에 있어서,상기 기판은 PCB인,소변을 이용하여 케톤체를 측정하는 바이오 전자센서.
- 제19항에 있어서,상기 금속 전극은 Working electrode, Counter electrode, Reference electrode로 구성된,소변을 이용하여 케톤체를 측정하는 바이오 전자센서.
- 제19항에 있어서,상기 금속 전극은 백금(Pt), 금(Au), 카드뮴(Cd), 은(Ag), 납(Pb), 니켈(Ni)을 포함하는,소변을 이용하여 케톤체를 측정하는 바이오 전자센서.
- 제19항에 있어서,상기 소변을 이용하여 케톤체을 측정하는 바이오 전자센서는 전기화학적 방식으로 측정가능한,소변을 이용하여 케톤체를 측정하는 바이오 센서.
- 기판을 준비하는 단계;금속 전극을 준비하는 단계;상기 기판 상에 금속 전극을 부착하는 단계;상기 금속 전극 상에 제1효소 층을 고정하는 단계;상기 제1효소 층을 건조하는 단계;상기 제1효소 층 상에 제2효소 층을 고정하는 단계; 및상기 제2효소 층을 건조하는 단계를 포함하고,상기 제1효소 층은 효소 HBDH 및 보조효소 NAD를 포함하며,상기 제2효소 층은 효소 HBDH 및 보조효소 NADH를 포함하는,소변을 이용하여 케톤체를 측정하는 바이오 전자센서를 제조하는 방법.
- 제24항에 있어서,상기 기판은 PCB인,소변을 이용하여 케톤체를 측정하는 바이오 전자센서를 제조하는 방법.
- 제24항에 있어서,상기 금속 전극은 Working electrode, Counter electrode, Reference electrode로 구성된,소변을 이용하여 당을 측정하는 바이오 전자센서를 제조하는 방법.
- 제24항에 있어서,상기 금속 전극은 백금(Pt), 금(Au), 카드뮴(Cd), 은(Ag), 납(Pb), 니켈(Ni)을 포함하는,소변을 이용하여 케톤체를 측정하는 바이오 전자센서를 제조하는 방법.
- 제24항에 있어서,상기 제1효소 층을 고정하는 단계는,효소 HBDH(D-beta-hydroxybutyrate dehydrogenase)와 보조효소 NAD(Nicotinamide Adenine Dinucleotide)와 GA를 포함하는 혼합용액을 상기 금속 전극 위에 코팅하는 단계를 포함하는,소변을 이용하여 케톤체를 측정하는 바이오 전자센서를 제조하는 방법.
- 제24항에 있어서,상기 제1효소 층을 건조하는 단계는,35℃ 내지 40℃의 온도에서 30분 이상의 건조시간을 포함하는 단계를 포함하는,소변을 이용하여 케톤체를 측정하는 바이오 전자센서를 제조하는 방법.
- 제24항에 있어서,상기 제2효소 층을 고정하는 단계는,효소 HBDH(D-beta-hydroxybutyrate dehydrogenase)와 보조효소 NADH(Nicotinamide Adenine Dinucleotide)와 GA를 포함하는 혼합용액을 상기 제1효소 층 위에 코팅하는 단계를 포함하는,소변을 이용하여 케톤체를 측정하는 바이오 전자센서를 제조하는 방법.
- 제24항에 있어서,상기 제2효소 층을 건조하는 단계는,35℃ 내지 40℃의 온도에서 30분 이상의 건조시간을 포함하는 단계를 포함하는,소변을 이용하여 케톤체를 측정하는 바이오 전자센서를 제조하는 방법.
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US20170333904A1 (en) * | 2016-05-20 | 2017-11-23 | Eli Lyons | Sensor system and method for disease detection |
KR20180072386A (ko) * | 2016-12-21 | 2018-06-29 | 주식회사 유엑스엔 | 연속 혈당 측정장치, 상기 장치를 포함한 연속 혈당 측정시스템 및 연속 혈당 측정방법 |
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KR20180072386A (ko) * | 2016-12-21 | 2018-06-29 | 주식회사 유엑스엔 | 연속 혈당 측정장치, 상기 장치를 포함한 연속 혈당 측정시스템 및 연속 혈당 측정방법 |
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