62 results about "Silver chloride electrode" patented technology

The invention provides a copper-nickel alloy catalytic electrode and a preparation method and application thereof. The copper-nickel alloy catalytic electrode comprises a foamed nickel substrate and a copper-nickel alloy vertically loaded on the surface of the foamed nickel substrate, the molecular formula of the copper-nickel alloy is Cu < 0.81 > Ni < 0.19 >, and the copper-nickel alloy is of a dendritic nanostructure. The preparation method comprises the following steps: adding copper sulfate, nickel sulfate and ammonium sulfate into water, and uniformly stirring to obtain an electrolyte; taking a foamed nickel substrate as a working electrode, taking a saturated silver-silver chloride electrode as a reference electrode, taking a platinum sheet or a graphite rod electrode as a counter electrode, and applying constant current density to the working electrode to obtain a preset electrode; and alternately cleaning the preset electrode by using ethanol and distilled water, and carrying out vacuum drying to obtain the copper-nickel alloy catalytic electrode. According to the prepared copper-nickel alloy catalytic electrode, the copper-nickel alloy is in a dendritic morphology, has abundant active sites and a high specific surface area, and has excellent catalytic activity and stability in hydrogen preparation by coupling hydrogen evolution reaction for synthesizing adipic acid through electro-catalysis of cyclohexanone.

The present invention is a treatment method for an alloy, the method being used for the purpose of obtaining a solution that contains nickel and / or cobalt from an alloy that contains nickel and / or cobalt and copper. This treatment method for an alloy comprises a leaching step in which the alloy is subjected to a leaching treatment by adding an acid solution to the alloy in the coexistence of a sulfurizing agent, thereby obtaining a leachate and a leaching residue; and in the leaching step, the leaching treatment is carried out while maintaining the copper concentration in the reaction solution within the range of 0.5 g / L to 15 g / L by adding a divalent copper ion source thereto. Moreover, in the leaching step, the leaching treatment is carried out while maintaining the redox potential of the reaction solution at 50 mV or more, using a silver / silver chloride electrode as a reference electrode.

The utility model discloses an anti-corrosion sensor for monitoring corrosion of an in-service FPS0 ballast tank, which comprises a sensor shell, a waterproof cable extending into an inner cavity is arranged on the sensor shell, a silver chloride electrode is arranged at the bottom of the sensor shell, one end of the silver chloride electrode extends into the inner cavity and is electrically connected with the waterproof cable in the inner cavity, and the other end of the silver chloride electrode extends downwards. A flange plate used for sealing the inner cavity is arranged at the top end of the sensor shell, a connecting hole allowing the waterproof cable to extend out is formed in the flange plate, a first connecting part used for sealing and fixing the waterproof cable is arranged on the flange plate, and a second connecting part used for sealing and fixing the silver chloride electrode is arranged at the bottom end of the sensor shell. And the surface of the sensor shell is provided with a fixed connecting device for quickly installing the sensor shell and a rib plate on the inner wall of the ballast tank. Installation can be achieved in the offshore FPSO operation period, damage to a ship body is avoided, thermal treatment is not needed, and rapid installation and replacement can be achieved.

The invention discloses preparation and application of a gold electrode and an electrochemical detection device. The preparation method of the modified gold electrode comprises the following steps: activating a polished and ground bare gold electrode with nitric acid, and immersing the polished and ground bare gold electrode into a deoxidized cysteamine (Cyst) solution for 2 hours; washing with double distilled water and soaking for about 12 hours, and removing physically adsorbed Cyst to obtain a Cyst modified gold electrode; immersing the Cyst modified gold electrode into a nanogold solution for 18 hours, taking out and airing to obtain a colloidal gold-Cyst modified gold electrode; and finally, immersing the colloidal gold-Cyst modified gold electrode into Cyst for 2 hours, taking out and airing to obtain the target modified gold electrode. The modified gold electrode prepared by the method, a platinum wire electrode and a silver-silver chloride electrode form a three-electrode system. The modified gold electrode in the three-electrode system has a good electrochemical catalytic oxidation function on the uric acid, the peak current and the content of the uric acid are in a linear relation, and the system can be directly used for detecting the uric acid in the urine.

To provide a biological information measurement device capable of measuring biological information from the right ear and the left ear.SOLUTION: The biological information measurement device comprises: a first electrode for measuring biological information at a part of the right ear; a second electrode for measuring biological information at a part of the left ear; and a differential amplifier circuit for amplifying a measurement result measured from between the two electrodes of the first electrode and the second electrode. The first electrode or the second electrode is a dry electrode obtained by forming a conductive film using silver-silver chloride electrode outside the first electrode or the second electrode.SELECTED DRAWING: Figure 24

A hydrogen storage alloy-based all-solid-state pH sensor is disclosed, comprising a counter electrode, a working electrode, a reference electrode, and a flexible substrate. The counter electrode is a platinum electrode, the working electrode is a hydrogen storage alloy electrode, the reference electrode is a silver / silver chloride electrode, and the flexible substrate is PET. Using the hydrogen-storage titanium-iron alloy electrode as the working electrode and an Ag|AgCl electrode as the reference electrode, the potential of the test solution is measured, and the pH value of the test solution is obtained through a standard curve. This invention explored the optimal ratio of titanium and iron elements through a series of experiments, enabling the sensor to simultaneously achieve both accuracy and stability. While ensuring good hydrogen ion response, optimal stability is obtained by adjusting the titanium-iron element ratio, making it suitable for long-term real-time online in vivo pH detection.

The invention relates to the technical field of oxygen free radical detection, in particular to a manufacturing process of a portable and reliable oxygen free radical detector. Comprising the following steps: mixing superoxide dismutase, potassium ferricyanide, an isothiazolinone preservative, hexammine ruthenium chloride, polyethylene glycol octylphenol ether, trehalose and bovine serum albumin, and uniformly stirring to prepare an enzyme preparation; mixing an enzyme preparation with the high polymer material solution to form reagent layer slurry with viscosity; uniformly coating the reagent layer slurry on a substrate material, and drying; printing an electrode material on the substrate material to form a working electrode and a counter electrode; the silver electrode is placed in an electrolyte containing chloride ions, potential is applied, the silver surface is subjected to a chlorination reaction, and a silver / silver chloride electrode is formed; covering the reagent layer above the electrode, tightly combining the reagent layer with the electrode in a sticking or hot pressing manner, and cutting to obtain the test paper; the prepared portable oxygen free radical detector can be used for conveniently and efficiently detecting oxygen free radicals of a human body at low cost.

A single-use disposable potentiometric reference sensor includes an insulating base substrate; a reference electrode disposed on the insulating base substrate, wherein the reference electrode is a silver-silver chloride electrode; an inner layer disposed on the reference electrode, wherein the inner layer is an amorphous salt layer including an amorphous polysaccharide and a salt having equally-mobility cations and anions; and a semi-permeable cover membrane disposed over the inner layer, wherein the semi-permeable cover membrane has water vapor and ion permeability.

An electrode that includes: a substrate; a silver / silver chloride electrode section on at least a part of a surface of the substrate; and a film containing particles of a two-dimensional material including one layer or a plurality of layers on at least a part of a surface of the silver / silver chloride electrode section exposed to an external environment, wherein the one layer or the plurality of layers include a layer body represented by: MmXn, wherein M is one or more metals of Group 3, 4, 5, 6, and 7 and includes Ti, X is a carbon atom, a nitrogen atom, or a combination thereof, n is 1 to 4, and m is more than n but not more than 5; and a modifier or terminal T is present on a surface of the layer body.

The invention discloses a wearable molecular imprinting sensor and application thereof in cortisol detection, and belongs to the technical field of electrochemical analysis and detection. The molecular imprinting sensor sequentially comprises a sweat absorbing pad, a three-electrode system, an annular polydimethylsiloxane mold and a medical bonding patch from the skin contact surface to the outside, the front surface of the sweat-absorbent pad is in contact with the skin, and KCl and K3 [Fe (CN) 6] are adsorbed on the back surface of the sweat-absorbent pad; the three-electrode system takes an MIP / AuNWs / PET sensor as a working electrode, a platinum wire as a counter electrode and a silver / silver chloride electrode as a reference electrode; the annular polydimethylsiloxane mold and the medical adhesive patch form a sweat collection chamber. The molecular imprinting sensor based on in-situ growth of gold nanowires (AuNWs) on the porous PET film is used for rapidly detecting the cortisol level in human sweat in real time, natural receptor ligand interaction is simulated through the molecular imprinting technology, and high-specificity recognition of cortisol is achieved.

A sterilization system for sterilizing a biofilm formed on an object, the sterilization system being provided with: a sterilization composition containing an organic compound having a standard oxidation-reduction potential (pH7) of-0.7 V to-0.2 V and water; a bactericidal composition supply unit for holding the bactericidal composition; a nozzle for supplying the bactericidal composition held by the bactericidal composition supply unit to the biofilm; an electrode provided on the nozzle so as to be in contact with the bactericidal composition; and a control unit which is connected to the electrode and which applies, to the electrode, a potential that is greater than the lower limit value of the potential window and that is-0.4 V or less based on the silver / silver chloride electrode.

The invention discloses a modified electrode based on a cyclic peptide-enzyme composite material and application of the modified electrode in hydrogen peroxide detection. The cyclic peptide-enzyme composite material modified electrode has good reproducibility and selectivity on hydrogen peroxide detection, cyclic tryptophan dipeptide (c-WW) is utilized for self-assembly to form spherical nano-particles, and the spherical nano-particles are combined with horse radish peroxidase (HRP) to form the cyclic peptide-enzyme nano composite material. The cyclopeptide-enzyme composite material is fixed on the surface of a glassy carbon electrode by using a Nafion solution, and the modified glassy carbon electrode Nafion / HRP-(c-WW NPs) / GCE is used as a working electrode, a platinum wire electrode is used as a counter electrode and a silver-silver chloride (Ag / AgCl) electrode is used as a reference electrode to form a three-electrode system, so that high-sensitivity detection of hydrogen peroxide is realized. The detection method provided by the invention has the characteristics of quick response, high sensitivity, high selectivity, low detection limit, good biocompatibility and the like on detection of hydrogen peroxide, and has a very good application prospect.

A method is provided which enables selectively leaching nickel and / or cobalt from an alloy that contains copper and nickel and / or cobalt in a waste lithium ion battery.This alloy processing method involves obtaining a solution that contains nickel and / or cobalt from an alloy that contains copper and nickel and / or cobalt, wherein the alloy processing method involves a leaching step for adding an acid solution to the alloy in a state in which a sulfurizing agent is also present, and obtaining a leachate and a leaching residue by performing leaching processing while controlling the redox potential (the reference electrode being a silver / silver chloride electrode) to at least 100 mV and less than 250 mV. In the leaching processing in the leaching step, an operation is performed that temporarily decreases the redox potential to less than or equal to −100 mV.

An electrode having a substrate, a silver / silver chloride electrode part, and a film containing particles of a two-dimensional material, the particles of the two-dimensional material including one or more layers, the one or more layers including a layer body represented by the following formula, and a modification or terminal T present on a surface of the layer body, mmXn (in the formula, M is at least one type of group 3, 4, 5, 6, and 7 metal and contains Ti, X is a carbon atom, a nitrogen atom, or a combination thereof, n is 1 to 4, and m is greater than n and 5 or less) (T is at least one type selected from the group consisting of a hydroxyl group, a fluorine atom, a chlorine atom, an oxygen atom, and a hydrogen atom).

A single-use disposable potentiometric reference sensor includes an insulating base substrate, a reference electrode disposed on the insulating base substrate where the reference electrode is a silver-silver chloride electrode, an internal layer disposed on the reference electrode where the internal layer is an amorphous salt layer that includes an amorphous polysaccharide and a salt having equi-mobility cations and anions, and a semipermeable cover membrane disposed over the internal layer where the semipermeable cover membrane has water vapor and ion permeability.

The application provides a PolyA-mediated label-free electrochemical sensor and a preparation method and application thereof, and relates to the technical field of electrochemical biosensing. The sensor adopts a three-electrode system as a whole working system, the three-electrode system comprises a working electrode, a reference electrode and an auxiliary electrode; the working electrode is a PolyA-mediated label-free electrochemical aptamer sensor, an AFB1 aptamer is used as a biological recognition element, the biological recognition element is paired with a DNA segment containing a PolyA sequence in a complementary manner, and then is fixed on the surface of a gold electrode by the specific affinity between PolyA and gold; the reference electrode is a silver chloride electrode, and the auxiliary electrode is a platinum wire electrode. The PolyA-mediated label-free electrochemical sensor has the advantages of high detection sensitivity, strong specificity, simple operation, fast detection speed and low cost.

A method for forming an Ag / AgCl coated electrode includes providing a polymeric electrode substrate made of Acrylonitrile Butadiene Styrene (ABS). A layer of silver (Ag) is deposited on the polymeric electrode substrate using physical vapor deposition (PVD) to form an Ag coated electrode. The layer of Ag is deposited to a first thickness by sputtering an Ag target onto the polymeric electrode substrate. The Ag coated electrode is then converted to a layer of silver / silver chloride (Ag / AgCl) by dipping it into a conversion solution. The resulting Ag / AgCl coated surface electrode provides improved performance and stability for various applications.

The present invention belongs to the field of medical electrophysiology, and provides an electrode, an electrode clip, and a preparation method for in vitro electrocardiogram monitoring. The present invention uses carbon foam as the substrate of the electrode, adopts an electrochemical deposition method to deposit nanosilver on the carbon foam, and then performs an electrochemical chlorination method to obtain silver chloride. Finally, polyvinyl alcohol hydrogel is poured to prepare a polyvinyl alcohol hydrogel-carbon foam-silver / silver chloride electrode. The electrode prepared by the present invention has the advantages of excellent electrical conductivity, long service life, not easy to fall off, good softness, etc. The polyvinyl alcohol hydrogel-carbon foam-silver / silver chloride electrode prepared by the present invention is further improved to prepare a polyvinyl alcohol hydrogel-carbon foam-silver / silver chloride electrode clip that can be used for electrocardiogram monitoring, achieving the purpose of in vitro detection with non-invasive, excellent conductivity, high sensitivity, good stability, and long service life. The electrode clip of the present invention will replace traditional acupuncture to detect electrocardiogram changes in mice, and provide a meaningful exploration for in vitro non-invasive electrocardiogram detection.

This invention relates to the field of pollutant detection technology, and discloses a method for preparing bimetallic selenides and its non-enzymatic electrochemical sensor and applications. The reference electrode of the non-enzymatic electrochemical sensor is a silver / silver chloride electrode, the auxiliary electrode is a platinum wire electrode, and the working electrode is a glassy carbon composite electrode containing a bimetallic selenide coating. The bimetallic selenide is CuInSe2, which exhibits sensitivity in identifying parathion. This improves the accuracy and ease of operation in detecting parathion and reduces the detection cost. The method for preparing the bimetallic selenide proposed in this invention uses ethylamine and N,N-dimethylformamide as solvents, and through a solvothermal reaction, reacts cuprous chloride, indium chloride, and selenium powder to generate CuInSe2, which has the advantages of high reaction efficiency and low manufacturing cost.

A vital signs monitoring patch (VSM) with an integrated display includes a user access layer for accessing a display portion and a first printed silver-silver chloride (Ag-AgCl) electrode. A polyethylene foam layer includes a battery and a plunger cutout. A printed circuit board assembly (PCBA) layer includes a vital signs monitoring sensor and a battery and is connected to the first and second printed Ag-AgCl electrodes. The polyethylene foam layer is bonded to the user access layer and the PCBA layer. The sensor layer includes a reflective oximeter assembly and a second printed Ag-AgCl electrode. A hydrogel conductive adhesive is used to interact between the user's skin and the second printed Ag-AgCl electrode. A medical tape layer is bonded to the user's skin and the sensor layer. The plunger is connected to the PCBA layer and is configured to power the VSM, wherein user access to the first printed Ag-AgCl electrode completes a circuit with the second printed Ag-AgCl electrode.

The invention discloses a fast-activation silver chloride electrode and a preparation method thereof, and belongs to the technical field of electrochemical electrode materials, under the condition of red light, (1) welding a silver or copper guide lug on a silver foil or a copper foil substrate plated with a silver layer with enough thickness; (2) putting a silver foil with a guide lug or a copper foil plated with a silver layer with enough thickness into a positive electrode clamp, putting the positive electrode clamp into a formation tank, and respectively putting an auxiliary electrode into clamping grooves on two sides; (3) adding a formation solution to completely submerge the positive electrode clamp; (4) connecting the anode of a direct-current power supply with a guide lug, connecting the cathode with an auxiliary electrode wire, and performing electrochemical oxidation; (5) carrying out pre-discharge treatment on the prepared silver chloride electrode through an electronic load; and (6) washing the prepared silver chloride electrode with deionized water, drying or naturally airing, and storing in a dark place. The problem of voltage lag of the silver chloride electrode at the initial stage of discharge is solved, and the activation time of the water activated battery used as the ignition battery is remarkably shortened.

The invention provides an online monitoring device and method, electronic equipment, a storage medium and a chip, and relates to the technical field of oilfield produced water multi-index monitoring. The reference electrode is connected with the sealed metal shell; the aluminum alloy electrode is connected with the reference electrode; the silver chloride electrode is connected with the reference electrode; a conductivity sensor; a corrosion rate sensor; the data acquisition core plate is connected with the sealed metal shell, the reference electrode, the aluminum alloy electrode, the silver chloride electrode, the conductivity sensor and the corrosion rate sensor, and the data acquisition core plate determines the pipeline potential through the sealed metal shell and the reference electrode; the data acquisition core plate determines a first calculation parameter of a pH value through the aluminum alloy electrode and the reference electrode, determines a second calculation parameter of a chloride ion content value through the silver chloride electrode and the reference electrode, determines a conductivity parameter through the conductivity sensor, and determines a corrosion rate through the corrosion rate sensor.

The invention relates to the technical field of pollutant detection, and discloses a preparation method of bimetallic selenide and a non-enzymatic electrochemical sensor and application of the non-enzymatic electrochemical sensor, a reference electrode of the non-enzymatic electrochemical sensor is a silver / silver chloride electrode, an auxiliary electrode is a platinum wire electrode, and a working electrode is a glassy carbon composite electrode containing a bimetallic selenide coating. The bimetallic selenide is CuInSe2, and the CuInSe2 contained in the bimetallic selenide has the sensitivity of identifying parathion. The parathion detection accuracy and operation convenience can be improved, and the parathion detection cost is reduced. According to the preparation method of the bimetallic selenide, ethylamine and N, N-dimethylformamide serve as solvents, cuprous chloride, indium chloride and selenium powder react to generate CuInSe2 through solvothermal reaction, and the preparation method has the advantages of being high in reaction efficiency and low in manufacturing cost.

A method for forming an Ag / AgCl coated electrode includes providing a polymeric electrode substrate made of Acrylonitrile Butadiene Styrene (ABS). A layer of silver (Ag) is deposited on the polymeric electrode substrate using physical vapor deposition (PVD) to form an Ag coated electrode. The layer of Ag is deposited to a first thickness by sputtering an Ag target onto the polymeric electrode substrate. The Ag coated electrode is then converted to a layer of silver / silver chloride (Ag / AgCl) by dipping it into a conversion solution. The resulting Ag / AgCl coated surface electrode provides improved performance and stability for various applications.

The subject of the invention is a method for determination of thymoquinone by square wave voltammetry (SWV), characterized by the steps of preparing the supporting electrolyte (2), preparing the sample solution for analysis, where the medium (M) in which the sample is dissolved is oil or water or a water-soluble solvent, then an electrochemical cell (1) is prepared, which is placed with the supporting electrolyte (2) and a magnetic stirrer (6), a platinum electrode (3) as an auxiliary electrode, a saturated silver chloride electrode (4) as a reference electrode and a working electrode (5) are introduced successively, where the electrode reaction of thymoquinone reduction takes place at the working electrode surface (5), then the electrodes are connected to the potentiostat (7), each to a dedicated connection, and then the supporting electrolyte solution (2) is deoxidized with argon from the gas cylinder (8) constituting a gas source connected to the electrochemical cell (1) with a supply tube (9), then standard and sample voltammograms are recorded at the potential range and parameters of the SWV technique. Bibliography [1] Al Foudah, et al., Phytochem Anal 33(2) (2022) 184-193 [2] R. Ahmad, et al., Food Chem 309 (2020) 125740 [3] M. Iqbal, et al., Open Access Scientific Reports (2) (2013) 655 [4] RM Soliman, et al., Acta Pharm 70(3) (2020) 325-342 [5] GM Hadad, et al., J Chromatogr Sci 52(7) (2014) 617-23 [6] OA Ghosheh, et al., J Pharm Biomed Anal 19(5) (1999) 757-62 [7] E. Shawky, et al., J Chromatogr B Analyt Technol Biomed Life Sci 1087-1088 (2018) 108-117; [8] RM Velho-Pereira, et al., Phytochem Anal 22(4) (2011) 367-73 [9] A. Michelitsch, et al., Phytochem Anal 14(4) (2003) 224-7 [10] Ahmad, et al., J Chromatogr Sci 58(7) (2020) 629-635; [11] A. Ahmad, et al., Acta Chromatographica 27(3) (2015) 435-448 [12] HM Marzouk, et al., Microchemical Journal 159 (2020) 105472 [13] GM Hadad, et al., J AOAC Int 95(4) (2012) 1043-7) [14] M. Iqbal, et al., Open Access Scientific Reports (2) (2013) 655 [15] M. Alkharfy, et al., J Chromatogr Sci 58(7) (2020) 629-635 [16] RM Soliman, et al., Acta Pharm 70(3) (2020) 325-342 [17] GM Hadad, et al., J Chromatogr Sci 52(7) (2014) 617-23 [18] OA Ghosheh, et al., J Pharm Biomed Anal 19(5) (1999) 757-62 [19] A. Ahmad, at al., Acta Chromatographica 27(3) (2015) 435-448 [20] HM Marzouk, et al., Microchemical Journal 159 (2020) 105472 [21] R. Ahmad, et al., Food Chem 309 (2020) 125740 [22] GM Hadad, et al., J AOAC Int 95(4) (2012) 1043-7 [23] Al Foudah, et al., Phytochem Anal 33(2) (2022) 184-193 [24] E. Shawky, et al., J Chromatogr B Analyt Technol Biomed Life Sci 1087-1088 (2018) 108-117 [25] RM Velho-Pereira, et al., Phytochem Anal 22(4) (2011) 367-73 [26] A. Michelitsch, A. Rittmannsberger, A simple differential pulse polarographic method for the determination of thymoquinone in black seed oil, Phytochem Anal, 14 (2003) 224-227 .

A single-use disposable potentiometer reference sensor includes: an insulating bottom substrate; the reference electrode is arranged on the insulating bottom substrate, and the reference electrode is a silver-silver chloride electrode; an inner layer disposed on the reference electrode, where the inner layer is an amorphous salt layer comprising an amorphous polysaccharide and a salt having an equal mobility cation and anion; and a semi-permeable cover film disposed over the inner layer, where the semi-permeable cover film has water vapor and ion permeability.

To provide a single-use potentiometric reference sensor that is dependable by providing a stable potential and is not susceptible to environmental factors.SOLUTION: A single-use disposable potentiometric reference sensor includes an insulating base substrate 20, a reference electrode 70 disposed on the insulating base substrate, where the reference electrode is a silver-silver chloride electrode, a potentiometric reference electrode reagent matrix 60 disposed on the reference electrode, where the potentiometric reference electrode reagent matrix is an amorphous salt layer that includes an amorphous polysaccharide and a salt having equi-mobility cations and anions, and a semipermeable cover membrane disposed over the potentiometric reference electrode reagent matrix, where the semipermeable cover membrane has water vapor and ion permeability.SELECTED DRAWING: Figure 5

A sterilization method for bacteria contained in a biofilm, including: preparing a composition containing an organic compound having the standard oxidation-reduction potential (pH 7) of -0.7 V to -0.2 V, and water; bringing the composition into contact with the biofilm and a conductor; and applying a potential that is higher than the lower limit value of the potential window and that is -0.4 V or lower with respect to a silver / silver chloride electrode to the conductor.

The invention discloses an electrochemical detection method for doxorubicin concentration in body fluid, which adopts a Cu-Co bimetallic Prussian blue derivative Cu-Co PBA-VCN modified gold electrode with carbon and nitrogen vacancies as a working electrode, a silver / silver chloride electrode as a reference electrode and a platinum wire as a counter electrode, and the doxorubicin titer is detected through cyclic voltammetry. And nano impact electrochemistry is utilized, and amplified electrochemical signals are obtained through a chronoamperometry. The preparation method of the working electrode comprises the following steps: (1) dissolving sodium citrate and copper nitrate in deionized water, stirring, dropwise adding a K3Co (CN) 6 solution, standing the solution for 24 hours, collecting precipitate, and drying to obtain a Cu-Co PBA precursor; (2) activating the Cu-Co PBA precursor by using H2 plasma, so as to obtain Cu-Co PBA-VCN; (3) adding the Cu-Co PBA-VCN and the MWCNTs into the deionized water, and carrying out ultrasonic dispersion; and (4) dropping the dispersion liquid onto a gold electrode, and drying at 4 DEG C to obtain the working electrode. The detection method has the advantages of low detection limit, wide detection range, high sensitivity, high reliability and the like.

The invention relates to the technical field of oxygen free radical detection, and in particular to a manufacturing process of a portable oxygen free radical detector. The method comprises the following steps: mixing superoxide dismutase, potassium ferricyanide, an isothiazolinone preservative, hexaammineruthenium chloride, polyethylene glycol octylphenyl ether, trehalose and bovine serum albumin, stirring and mixing to obtain an enzyme preparation; mixing the enzyme preparation with a polymer material solution to form a reagent layer slurry with viscosity; uniformly coating the reagent layer slurry on a base material, and drying; printing an electrode material on the base material to form a working electrode and a counter electrode; placing a silver electrode in an electrolyte containing chloride ions, applying a potential to cause a chlorination reaction on the silver surface, and forming a silver / silver chloride electrode; covering the electrode with a reagent layer, bonding them tightly by gluing or hot pressing, and then cutting to obtain a test paper. The portable oxygen free radical detector thus obtained can detect oxygen free radicals in the human body conveniently, efficiently and at low cost.