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78 results about "Chemically modified electrode" patented technology
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A chemically modified electrode is an electrical conductor (material that has the ability to transfer electricity) that has its surface modified for different electrochemical functions. Chemically modified electrodes are made using advanced approaches to electrode systems by adding a thin film or layer of certain chemicals to change properties of the conductor according to its targeted function.
Method for preparing graphene oxide/carbon nano tube/cellulose composite gel from ionic liquid
The invention discloses a method for preparing graphene oxide / carbon nano tube / cellulose composite gel from ionic liquid, relating to a preparation method of cellulose composite gel and aiming to solve the technical problems that the composite gel obtained by using the traditional method is polluted by a solvent and the gel is easy to deform in a solvent exchange process. The method comprises the following steps of dissolving cellulose into ionic liquid; then, adding graphene oxide and carbon nano tube dispersing liquid; pouring a mixed solution obtained after reacting under heating into a die; standing for cooling; then, replacing the ionic liquid by using water; next, drying to obtain the graphene oxide / carbon nano tube / cellulose composite gel. The graphene oxide / carbon nano tube / cellulose composite gel can be used for a sensor, an electromagnetic shielding material, a chemically modified electrode or a supercapacitor.
Owner:HEILONGJIANG UNIV
Electrochemistry detecting method and testing apparatus of saccharification hemoglobin content
InactiveCN101158691AEasy to combine with electrochemical analysisInexpensive combined with electrochemical analysisMaterial analysis by electric/magnetic meansBiological testingElectrochemical responseHEMOGLOBIN I
The present invention provides an electrochemical detection method for content of glycosylated hemoglobin in the blood, and is characterized in that: whole blood specimen is diluted by combined liquid ranging from 30 times to 70 times and passes through a glycosylated protein recognizer, electric activated small molecules are filled into the effluent liquid from the glycosylated protein recognizer, and electrochemical response of the liquid is detected by chemically modified electrodes after the filling, thereby obtaining the concentration of the blood glucose. The glycosylated protein recognizer is eluted by elute solvent, and the electrochemical response of the elute solvent is detected and the concentration of the glycosylated hemoglobin is obtained, thereby obtaining the content of the glycosylated hemoglobin of the sample after calculation. As the electrochemical detection is simple in operation, lower in cost and rapid in the analysis, the present invention is expected to realize the rapid determination of the clinical glycosylated hemoglobin and the rapid determination of the glycosylated hemoglobin after separation and elution.
Owner:SOUTHEAST UNIV
Electro-polymerizable chemically-modified electrode organic material and application of electrode organic material in ultra-trace TNT (Trinitrotoluene) detection
InactiveCN103435537AClear structureEasy to controlOrganic chemistryMaterial analysis by electric/magnetic meansMicro nanoBackbone chain
The invention relates to an electro-polymerizable chemically-modified electrode organic material and application of the electrode organic material in ultra-trace TNT (Trinitrotoluene) detection and belongs to the field of electrochemical sensing technologies. The structural formula of the organic material is shown in the specification, wherein the molecular main chain skeleton consists of an A and two side units B. The A can be pyrene, naphthalene, anthracene, an anthracene derivative, phenanthrene, dibenzo-quinoxaline or the like; each B can be benzene, biphenyl, phenylene vinylene, fluorene or the like; each unit C is an electro-active unit and can be furan, pyrrole, thiophene, carbazole, diphenylamine, triphenylamine or the like. A connecting chain R for the molecular main chain skeleton and electrochemically-polymerized groups can be an alkyl chain, alkoxy chain or oxy chain. Carbazolyl groups can be subjected to crosslinking during electrochemical polymerization, and molecules can form spherical micro-nano structures due to crosslinking, so that on one hand, the contact specific surface area between the molecules of the organic material and TNT molecules is increased, on the other hand, due to pore structures formed among the micro-nano structures, TNT molecule diffusion paths are increased, and electrical signal response is enhanced.
Owner:陕西金士盾防务技术有限公司
Catalyst for catalyzing methyl alcohol, preparation method and chemically modified electrode of catalyst
InactiveCN103212442AEasy to spreadHigh Catalytic Oxidation RateOrganic-compounds/hydrides/coordination-complexes catalystsCell electrodesChemically modified electrodeAlcohol
The invention discloses a catalyst for catalyzing methyl alcohol. The catalyst disclosed by the invention comprises graphene, a polyacrylic acid-ferrocene compound and metal nanoparticles, wherein the mass ratio of the grapheme to the polyacrylic acid-ferrocene compound and the metal nanoparticles is (20-50):(150-250):(1-15). The graphene is taken as a substrate material of the catalyst for catalyzing methyl alcohol disclosed by the invention; the polyacrylic acid-ferrocene compound can enter a layer structure of the graphene to inhibit the aggregation of the graphene; homogeneous nucleation of the metal nanoparticles is promoted by the polyacrylic acid, so that the loaded metal nanoparticles has a higher catalytic activity; due to a net structure of the polyacrylic acid, the graphene-polyacrylic acid-ferrocene has a multi-channel stereoscopic structure, the movement of the particles is buffered and the homogeneous growth of the metal nanoparticles is further promoted. Therefore, the catalyst for catalyzing methyl alcohol disclosed by the invention has the advantages of higher catalytic activity for methanol and higher capability of resisting the poisoning of an intermediate.
Owner:QINGDAO UNIV
Semiconductor sensor for virus detection as well as preparation method and application thereof
ActiveCN111965231ALarge specific surface areaRich in surface activityBiological material analysisBiological testingEngineeringField effect
The invention belongs to the technical field of biochemical sensing, and discloses a semiconductor sensor for virus detection as well as a preparation method and an application thereof. The preparation method comprises the steps of (1) preparing an oxide or chalcogenide colloid semiconductor nano-material; (2) coating the surface of the colloid semiconductor nano material with a virus specific antigen or antibody to obtain a sensitive material; and (3) based on the sensitive material, preparing the virus detection sensor by adopting device structures such as a chemically modified electrode ora field effect transistor. The virus specific antigen or antibody is introduced to the surface of the colloid semiconductor nano material, charge transfer caused by a specific binding reaction betweenthe virus antigen and antibody is converted into a sensor electric signal to be output through a semiconductor sensitive effect, and the real-time performance and convenience of a virus detection technology are improved.
Owner:HUAZHONG UNIV OF SCI & TECH +1
Timolol maleate potentiometric chemical sensor and preparation method thereof
ActiveCN101556258AEliminate internal reference solutionHigh selectivityMaterial electrochemical variablesDip-coatingMolecularly imprinted polymer
The invention relates to and belongs to a potentiometric chemical sensor, in particular to a timolol maleate potentiometric chemical sensor and a preparation method thereof. The preparation method comprises the following steps: (1) carrying out the chemical modification by the periodic scanning electro-polymerization method after pre-processing the surface of the matrix electrode to prepare the chemically modified electrode; (2) preparing a PVC-film sensitive solution by the conventional method with the solvent being tetrahydrofuran, and coating the modified electrode with the PVC sensitive film by the dip-coating method to prepare a chemical sensor (I); (3) preparing the molecularly imprinted polymer (Polymer A) of timolol maleate, and preparing the PVC film (Film II) containing Polymer A; and (4) compounding the Film II onto the PVC sensitive film of the chemical sensor I. The invention can effectively overcome the disadvantages of the existence of internal reference solution electrodes in the prior art, furthermore, the chemical sensor of the invention is significantly superior to the existing ion-selective electrodes in term of the selectivity of the drug (such as propranolol hydrochloride and the like) ions with the molecule with the structures, such as alcohol amine, imido and the like.
Owner:溧阳常大技术转移中心有限公司
Chemically modified electrode for sensitive detection of doxycycline as well as preparation method and application thereof
ActiveCN109115850AImprove accuracyGood and enrichment ability AccuracyMaterial electrochemical variablesHeterojunctionElectrochemical response
The invention discloses a chemically modified electrode for sensitive detection of doxycycline as well as a preparation method and application thereof. The modified electrode is a glassy carbon electrode with high electrical activity and modified by ZnIn2S4@In2O3@MXene nanocomposite. The invention relates to the field of electroanalytical chemistry and electrochemical sensors. The ZnIn2S4@In2O3@MXene graded tubular heterojunction nanocomposite disclosed by the invention has large specific surface area and high catalytic activity and can increase the enrichment amount of doxycycline in an electrochemical detection medium and improve the measurement sensitivity while effectively accelerating electron transfer and improve the electrochemical response signal; and the composite has the advantages of high selectivity, simplicity and convenience, low price and high stability and is suitable for field detection. The chemically modified electrode prepared by the invention is already successfully applied to the accurate detection of doxycycline in animal-derived food.
Owner:XINYANG NORMAL UNIVERSITY
Zn-MOFs/glassy carbon electrode, and production method and application thereof
ActiveCN106501332AIncrease the active siteImprove adsorption capacityMaterial electrochemical variablesChemically modified electrodeGlassy carbon electrode
The invention discloses a production method of a chemically modified electrode for detecting concentration of ascorbic acid. By electrochemical activity of a metal organic framework material Zn-MOFs, the Zn-MOFs / glassy carbon electrode is produced according to an electro-deposition method. The modified glassy carbon electrode can be applied to detection of the concentration of the ascorbic acid in samples.
Owner:GUILIN UNIVERSITY OF TECHNOLOGY
Electrochemiluminescence for detecting bisphenol A
ActiveCN110296979AImprove adsorption capacityHas a brightening effectChemiluminescene/bioluminescenceMaterial electrochemical variablesChemically modified electrodePlatinum
The invention provides a method for detecting bisphenol A, in particular to the field of electrochemiluminescence detection. The operation procedure comprises the following steps of (1) preparation ofcomposite materials of Ti-based MOFs(MIL-125) fixed terpyridine ruthenium (Ru(bpy)32+); (2) preparation of Ru(bpy)32+@MIL-125 modified on the surface of a glassy carbon (GC) electrode, that is, a chemically modified electrode of Ru(bpy)32+@MIL-125 / GC; and (3) detection of bisphenol A by electrochemiluminescence, wherein the Ru(bpy)32+@MIL-125 / GC electrode is used as a working electrode, the Ag / AgCl electrode is used as a reference electrode, and the platinum electrode is used as an auxiliary electrode, thereby forming a traditional three-electrode system. In the method, the detection range is1.0*10-11mol / L to 1.0*10-6mol / L, and the minimum detection limit is 1.8*10-12mol / L. The method provided by the invention has low cost, high sensitivity and simple operation for detecting bisphenol A.
Owner:CHANGZHOU UNIV
Graphene composite, application of graphene composite to catalytic methanol oxidation, chemically modified electrode and preparation method of graphene composite
ActiveCN103506161AEnhanced anti-toxicitySmall particle sizeCell electrodesOrganic-compounds/hydrides/coordination-complexes catalystsDesorptionCatalytic oxidation
The invention provides a graphene composite which comprises a graphene layer, a prussian blue layer arranged on the graphene layer and nano platinum particles arranged on the prussian blue layer. In the graphene composite, existence of prussian blue enables the nano platinum particles deposited on the prussian blue surface to have a small average particle size so as to give a larger active surface area to a catalyst; moreover, the characteristics of a prussian blue complex are also beneficial for enhancing interaction between Pt and graphene and reducing fall-off of the catalyst on the surface of an electrode so as to improve catalytic stability of the catalyst; furthermore, strong interaction exists between iron ions at the center of the prussian blue and CO, so that toxic adsorption of CO to the Pt catalyst can be reduced to a certain degree and the desorption oxidation process of CO is promoted, and thus, toxicity resistance of the catalyst is obviously improved. Therefore, the graphene composite provided by the invention has higher catalytic activity on catalytic oxidation on methanol and a stronger antitoxic effect.
Owner:QINGDAO UNIV
Application of graphite conductive adhesive to prepare electrode-detection binder
InactiveCN101851479AImprove conductivityGood adhesionNon-macromolecular adhesive additivesMaterial analysis by electric/magnetic meansEpoxyChemically modified electrode
The invention discloses application of graphite conductive adhesive to prepare a chemically modified electrode or biosensor electrode binder for electrochemical biological sensing detection, wherein, the graphite conductive adhesive comprises the following components by weight percent: 40-60% of an epoxy resin, 20-40% of graphite powder, 10-30% of a diluent and 1.5-3% of an amine curing agent. The graphite conductive adhesive has excellent electrical conductivity, excellent adhesiveness, wide and flat electrochemical window, convenient use, and excellent application prospect in electrochemical biological detection.
Owner:SHANDONG UNIV
Electrochemical sensor for detecting estradiol as well as preparation method and application of electrochemical sensor
ActiveCN107192751AImprove electrocatalytic activityLow detection limitMaterial electrochemical variablesChemically modified electrodeElectrochemical gas sensor
The invention relates to the technical field of electrochemical analysis, particularly discloses an electrochemical sensor for detecting estradiol as well as a preparation method and application of the electrochemical sensor. A chemically modified electrode of the electrochemical sensor for detecting the estradiol is a working electrode; the preparation method of the chemically modified electrode comprises the following steps: firstly, preparing a nitrogen-doped reductive graphene oxide; secondly, taking the nitrogen-doped reductive graphene oxide (N-RGO) and dispersing the nitrogen-doped reductive graphene oxide with water to obtain a solution I; dispersing PdC12 with water to obtain a solution II; taking NaBH4, and dissolving the NaBH4 with water to form a solution III; thirdly, dropwise adding the solution II and the solution III into the solution I respectively and then standing for 30 minutes or above; carrying out centrifugation and purification to obtain palladium-nitrogen-doped reductive graphene oxide (Pd / N-RGO); fourthly, modifying the surface of the working electrode with the palladium-nitrogen-doped reductive graphene oxide to obtain the chemically modified electrode for detecting the estradiol. The chemically modified electrode and the electrochemical sensor disclosed by the invention have lower detection limit and wider detection range.
Owner:HENGYANG NORMAL UNIV
Preparation method of copper oxidechemically modified electrode for detecting glucose
InactiveCN106896151ALarge particlesMany reaction sitesMaterial electrochemical variablesCopper oxideCopper salt
Provided is a preparation method of a copper oxidechemically modified electrode for detecting glucose. The method comprises the main steps that according to the mass ratio of copper ions to urea 3:2, a copper salt solution is slowly and dropwise added to the urea solution to generate a cupper ion complex having high coordination number; then, the complex is put in a hydrothermal reaction kettle to perform hydrothermal reaction, and a copper oxide precursor is prepared; the precursor is decomposed into rice-shaped copper oxide at high temperature; then the copper oxide is matched with a Nafion solution to obtain a rice-shaped copper oxide modifying solution; finally the solution is dropwise added to the surface of the solid electrode to obtain the rice-shaped copper oxidechemically modified electrode. The preparation method is simple in operation, a template agent and template are omitted, and the copper oxide having a unique rice-shaped structure can be obtained. The prepared chemically modified electrode has the good electrochemical responsiveness to glucose, low detection limit (0.000075 mM), a wide detection range (0.001-2.361mM) and high sensitivity (2.376Ma.mM-1.cm-2).
Owner:SOUTHWEST JIAOTONG UNIV
Rapid screening method for lead, arsenic and mercury in cosmetics
InactiveCN102507711AImprove stabilityImprove accuracyMaterial electrochemical variablesChemically modified electrodePeak current
The invention discloses a rapid screening method for lead, arsenic and mercury in cosmetics. The rapid screening method comprises the simultaneous and rapid screening of lead and mercury or the simultaneous and rapid screening of arsenic and mercury and comprises the following steps of: taking the cosmetics to be detected, dissolving the cosmetics in a HCl solution, and obtaining a sample solution; taking a chemical modified electrode as a working electrode, taking a Ag / AgCl electrode as a reference electrode, carrying out stripping voltammetry detection on the sample solution, and recording data; and judging whether the lead or the arsenic or the mercury in the cosmetics to be detected is overproof according to the spike potentials and the peak currents of the lead and the mercury or the arsenic and the mercury in the sample solution. The rapid screening method disclosed by the invention is high in accuracy and high in sensitivity, the detection limits of the lead, the arsenic and the mercury are respectively 100 ppb, 25 ppb and 2.5ppb, and thus, the technical requirements on on-site rapid screening can be ensured; and the rapid screening method is simple and convenient in operation, the time and the cost for supervision can be greatly saved, and the supervision efficiency is increased.
Owner:广东省药品检验所
Chemically modified electrode for detecting cefalexin and electrochemical measurement method for cefalexin
ActiveCN104880497AHigh sensitivityLow costMaterial electrochemical variablesCysteine thiolateHydrolysate
The invention relates to the technical field of electrochemical detection and discloses a chemically modified electrode for detecting cefalexin and an electrochemical measurement method for the cefalexin. The chemically modified electrode is prepared through steps that adding colloidal gold solution to a clean gold electrode surface, drying, soaking in hydrochloric acid solution with cysteine, self-assembling at 1 to 6 degrees centigrade, taking out, and using water to wash to clean. The electrochemical detection method includes steps that adding copper sulfate solution to sample solution to be measured, hydrolyzing to obtain hydrolysate, using the chemically modified electrode as a working electrode, and using a square wave voltammetry to measure the concentration of surplus copper ions in the hydrolysate to indirectly measure the content of the cefalexin in the sample. The chemically modified electrode is high in sensitivity, fast, convenient, low in cost and the like for measuring the cefalexin.
Owner:ZHONGKAI UNIV OF AGRI & ENG
Polymer composite material, preparation method thereof and chemically modified electrode
InactiveCN103212439AImprove catalytic performanceImprove electrocatalytic performanceOrganic-compounds/hydrides/coordination-complexes catalystsMaterial electrochemical variablesElectrochemistryElectron
The invention provides a preparation method of a polymer composite material. Graphene oxide, polyacrylic acid and a copper salt are taken as starting raw materials, and the polymer composite material comprises copper nano-particles, the polyacrylic acid and graphene; and the weight ratio of the copper nano-particles to the polyacrylic acid to the graphene oxide is (0.5-8): (1-10): (0.01-0.1). In the preparation method provided by the invention, the graphene oxide can be better dispersed under the action of bifunctional molecules of the polyacrylic acid, so that the agglomeration problem of a graphene solution can be solved; furthermore, more copper nano-particles can be riveted on the surface of the graphene, so that the catalytic action of the polymer composite material is improved; and in addition, the obtained graphene has higher electro-catalytic action and electron conduction performance, so that the polymer composite material provided by the invention has higher electro-catalytic performance, can be used as a modification layer to prepare a modified electrode, can be used for electro-chemical determination of glucose, and improves the sensitivity in detection of the glucose.
Owner:QINGDAO UNIV
High-sensitivity chemically modified electrode for detecting thiabendazole and preparation method of chemically modified electrode
ActiveCN107422017AHigh selectivityHigh sensitivityMaterial electrochemical variablesChemically modified electrodeCarbon paste electrode
The invention relates to the field of nano electrochemical sensors and particularly discloses a high-sensitivity chemically modified electrode for detecting thiabendazole and a preparation method of the chemically modified electrode. The modified electrode is an ionic liquid carbon paste electrode modified with a CuO@SiO2@Ag nano-composite. The modified electrode has high measurement sensitivity and good selectivity for thiabendazole and is convenient, cheap, good in stability and suitable for on-site detection. The modified electrode is the ionic liquid carbon paste electrode modified with the CuO@SiO2@Ag with high electrochemical activity. The prepared chemically modified electrode is successfully applied to accurate detection of thiabendazole in samples.
Owner:JIANGSU NOON CROP SCI CO LTD
Preparation method and application of copper-based-organic metal framework electrochemical sensor for determining zearalenone
ActiveCN112798665ALow costShort detection and analysis timeMaterial electrochemical variablesChemically modified electrodeMetal framework
The invention provides a preparation method and application of a copper-based-organic metal framework electrochemical sensor for determining zearalenone, which belongs to the technical field of analysis and detection. The preparation method and application of a copper-based-organic metal framework electrochemical sensor for determining zearalenone comprise the following steps of preparing a copper-based-organic metal framework material, preparing various chemically modified electrodes, testing the surface appearance of the modified material, researching the electrochemical performance, drawing a linear relation curve, analyzing an actual sample by a standard addition method and the like. The sensor formed with a composite modified electrode Cu-MOF / Fe3O4-GO / GCE prepared by the preparation method disclosed by the invention as a working electrode becomes a good electrochemical platform for quantitatively determining the zearalenone toxin. The effective area of the composite modified electrode is 3.9 times that of an unmodified glassy carbon electrode, so that the electro-catalysis capability on the zearalenone toxin is obviously enhanced, and the composite modified electrode also has obvious anti-interference capability and good repeatability and reproducibility.
Owner:JIANGXI AGRICULTURAL UNIVERSITY
Electrochemical sensor for detecting tyrosine as well as preparation method and application thereof
ActiveCN107153088AImprove electrocatalytic activityLow detection limitMaterial electrochemical variablesChemically modified electrodePlatinum
The invention relates to the technical field of electrochemical detection, and in particular relates to an electrochemical sensor for detecting tyrosine as well as a preparation method and application thereof. The electrochemical sensor adopts a chemically modified electrode for detecting the tyrosine as a working electrode, Ag-AgCl as a reference electrode, and a platinum wire electrode as an auxiliary electrode. An electrode test system is connected with an electrochemical working station to form the electrochemical sensor for detecting the tyrosine after the electrode test system is assembled by utilizing a three-electrode method. The chemically modified electrode or the electrochemical sensor for quantitatively detecting the tyrosine has extremely low detection limit and a wider detection range as well as good stability, anti-interference ability and reproducibility.
Owner:HENGYANG NORMAL UNIV
Electrochemiluminescence method for detecting catechol
ActiveCN110308141ARealize detectionSimple and fast operationChemiluminescene/bioluminescenceMaterial electrochemical variablesChemically modified electrodePlatinum
The invention provides an electrochemiluminescence method for detecting catechol, and belongs to the field of catechol detection. The operation process includes the following steps of: (1) preparing acopper-based metal organic framework (MOFs) HKUST-1 composite material doped with carbon dots (CDs); (2) preparing a CDs@HKUST-1 / GC chemically modified electrode; (3) forming a traditional three-electrode system by taking the CDs@HKUST-1 / GC modified electrode as a working electrode, taking an Ag / AgCl electrode as a reference electrode, and taking a platinum electrode as an auxiliary electrode, and detecting catechol by using the electrochemiluminescence method. The modified electrode CDs@HKUST-1 / GC has a simple preparation method, has high sensitivity to the detection of catechol, and realizes a wide linear range. According to the scheme of the invention, the detection range is 5.0*10-9mol / L to 2.5*10-5mol / L, and the minimum detection limit is 3.8*10-9mol / L.
Owner:CHANGZHOU UNIV
Chemically modified electrode, preparation thereof and method for rapid determination of acid value of plant oil
InactiveCN101893595AImprove stabilityGood repeatabilityMaterial electrochemical variablesPolypyrroleTurbidity
Owner:CHINA AGRI UNIV
Self-assembly preparation of organic/inorganic compound film by transient metal substitution of polyoxometallate and polyamide-amine
InactiveCN101386471AEasy to operateShort film forming timeChemically modified electrodeComposite film
This invention relates to a preparation method of an organic-inorganic composite film which is self-mounted from transitional metal substituted polyoxometallate and Polyamide (PI)-amine tree-form molecule and is provided with electrocatalysis activity. The technical proposal is: a glassy carbon electrode or conductive glass substrate is cleaned and then go through cationization to obtain a ready-for-use substrate filmed by the glassy carbon electrode or the conductive glass substrate; the ready-for-use substrate is alternatively immerged into the transitional metal substituted polyoxometallate solution and PAMAM tree-form molecule for circulating scanning, so as to complete the self mounting of the film. By repeating the above steps, the organic-inorganic composite film with different layer numbers can be prepared. The composite film prepared by the method of the invention has the advantages of simple operation, short filming time and good uniformity, and the composite film reserves various electrochemical properties of TMPS. In particular, by using the PAMAM tree form molecule as the organic cation, the composite film is provided with high stability and high permeability. The composite film is expected to be applied to chemically modified electrodes and environmental catalysis.
Owner:FUJIAN NORMAL UNIV
Novel method of measuring content of adenine in Maca
ActiveCN106706747AEasy to operateReduce testing costsPreparing sample for investigationMaterial electrochemical variablesPurineCarbon nanotube
The invention relates to the field of cyclic voltammetry analysis and chemically modified electrodes, and in particular relates to an electrode manufacturing and electrochemical analytical method for measuring the content of adenine in Maca. The method comprises the following step of an electrochemical sensor capable of being used for measuring the content of adenine in Maca by successively using o-phenylenediamine, beta-cyclodextrin and silver-carbon nano tube modified glassy carbon electrodes. The critical characteristic of the method provided by the invention is as follows: the method comprises the steps: adding a carbon nanotube into an AgNO3 solution; and then putting the modified glassy carbon electrode therein and scanning the same in an electrochemical condition. The result represents that the electrochemical effect of the modified electrode on adenine is obvious. The method is sensitive, simple and good in repeatability. By applying the method, the content of adenine in Maca can be accurately measured. Compared with a conventional method of measuring adenine, the method provided by the invention is simple to operate, low in measuring cost and easy to operate. The method also can be applied to measuring the content of active ingredients of other adenine drugs.
Owner:DALIAN UNIVERSITY
Chemically modified electrode for quantitative determination of folic acid and preparation method of electrochemical sensor
ActiveCN106568817AImprove electrocatalytic activityEasy to detectMaterial electrochemical variablesMultiwalled carbonChemical Modifier
The invention discloses a chemically modified electrode for quantitative determination of folic acid and a preparation method of an electrochemical sensor. The method comprises the following steps: S11, fetching multiwalled carbon nanotube, adding concentrated nitric acid and concentrated sulfuric acid and then carrying out ultrasonic treatment so as to obtain a suspension; S 12, adding ethanol into the above suspension, and carrying out centrifugal separation; adding water and carrying out centrifugal separation until pH value of a filtrate is 6-8, and drying sediment to obtain carboxylated multiwalled carbon nanotube; S13, fetching the carboxylated multiwalled carbon nanotube, adding water and carrying out uniform ultrasonic dispersion, and adding glucose to form a solution A; S14, adding silver nitrate into water and stirring and dissolving, dropwise adding concentrated NH3.H2O to form a solution B; S15, adding the solution B into the solution A, stirring, ageing, centrifuging and washing, and drying by a drying oven to obtain an Ag / MWCNTs composite material; and S16, dispersing the Ag / MWCNTs composite material in an organic solvent to obtain a dispersion liquid; and coating and fixing the dispersion liquid on the surface of a cleaned glassy carbon electrode so as to obtain the electrode. The chemically modified electrode prepared by the above method has low detection limit and good selectivity.
Owner:湖南中检博科检验检疫服务有限公司
Method for preparing graphene chemically modified electrode through in-situ growth
InactiveCN103529099AEasy to operateImprove production efficiencyMaterial electrochemical variablesOxygenMaterials science
Owner:SOUTHWEST JIAOTONG UNIV
Silver-Prussian-blue-loaded nitrogen-doped graphene composite material and preparation method and application thereof
ActiveCN110426433ASolve the costAddress operational complexityMaterial nanotechnologyMaterial electrochemical variablesWater bathsN dimethylformamide
The invention discloses a silver-Prussian-blue-loaded nitrogen-doped graphene composite material and a preparation method and application thereof. The preparation method comprises the following stepsof adding concentrated hydrochloric acid, deionized water and N-N-dimethylformamide into K3[Fe(CN)6] for a reaction in a reaction kettle to obtain Prussian blue; dispersing the Prussian blue in deionized water, adding glucose, and stirring the mixture to obtain a Prussian blue dispersion; adding a silver ammonia solution into the Prussian blue dispersion, heating the mixture through a water bath,and performing standing; separating and washing products to obtain a silver-Prussian blue material; adding the silver-Prussian blue material into N,N-dimethylformamide-dispersed nitrogen-doped graphene to obtain the silver-Prussian-blue-loaded nitrogen-doped graphene composite material. A chemically modified electrode prepared from the silver-Prussian-blue-loaded nitrogen-doped graphene compositematerial can be used for quickly detecting sodium nitrite in food and has the advantages of wide detection range, low detection limit, simple operation and the like.
Owner:湖南角山米业有限责任公司
Method for detecting mercury ions based on Silica/chitosan/Ru nanoparticle electrochemiluminescence method
InactiveCN105044085ADoes not affect recognitionLow costChemiluminescene/bioluminescenceElectrochemiluminescenceElectrochemistry
The invention relates to a method for detecting mercury ions based on a Silica / chitosan / Ru nanoparticle electrochemiluminescence method. The method comprises the steps that silicon dioxide composite nanoparticles doped with chitosan and ruthenium are synthesized; 2, a blank Silica / chitosan / Ru-ssDNA system is prepared; 3, a Silica / chitosan / Ru-DNA / Hg system is prepared; 4, a modified electrode is assembled; 5, electrochemiluminescence signals are detected; 6, a delta Ii-CHgi standard curve is built; 7, detection is carried out. No complex probe molecule mark or fixing process is needed, time is saved, the cost is low, and recognition carried out by DNA rich in T basic group on mercury ions is not affected; meanwhile, the chemically modified electrode, the nanoparticle enrichment technology and an electrochemiluminescence analysis technology are combined, so that high-sensitivity Hg2+ detection is achieved, and the detection limit reaches 3pM.
Owner:SHAANXI NORMAL UNIV
Preparation and detection methods for chemically modified electrode for selectively measuring dopamine
InactiveCN104777205AIncrease transfer rateGood reversibilityMaterial electrochemical variablesPhosphateCarbon nanotube
The invention belongs to the electrochemical field, and particularly relates to preparation and detection methods for a chemically modified electrode for selectively measuring dopamine. The preparation comprises the following steps: preparing a multi-walled carbon nano-tube suspension, pre-treating a glassy carbon electrode, dripping and coating the prepared multi-walled carbon nano-tube suspension on the electrode, and drying for later use, soaking the electrode in 4-(2-pyridyl-azo) resorcinol solution, taking phosphate buffer as base solution, and carrying out cyclic scanning in a potential range from minus 0.8 to 2.2V to prepare the multi-walled carbon nano-tube-poly 4-(2-pyridyl-azo) resorcinol membrane modified electrode. The electrode is used for detecting the dopamine under the co-existence of ascorbic acid and uric acid, the result indicates that the electrode is capable of dividing the oxidation peak of ascorbic acid, dopamine and uric acid into three independent peaks with large distance, so that the interference of the co-existent ascorbic acid and uric acid on detection of the dopamine can be eliminated; the preparation and detection methods are high in sensitivity and good in reproducibility and stability.
Owner:SHENYANG NORMAL UNIV
Chemically modified electrode array sensor for detecting heavy metal ions in water body
ActiveCN112595763ARealize simultaneous measurementAchieving Simultaneous DetectionMaterial electrochemical variablesChemically modified electrodeChemical Modifier
The invention belongs to the technical field of heavy metal ion detection, and discloses a chemically modified electrode array sensor for detecting heavy metal ions in a water body. The sensor is characterized by comprising a counter electrode, a reference electrode and a plurality of working electrodes, wherein on a working electrode array formed by the plurality of working electrodes, differentworking electrodes are modified with different electrode modification materials, and a three-electrode system can be formed among the counter electrode, the reference electrode and any one of the working electrodes; the sensor can detect various heavy metal ions at the same time through the selectivity of different electrode modification materials to the heavy metal ions. According to the invention, the structure and arrangement mode of the key components of the sensor are improved, the plurality of working electrodes are arranged, and different functional materials are modified on different working electrodes to obtain the chemically modified array electrodes, so that various heavy metal ions in a water body can be monitored at the same time, and good detection precision is achieved.
Owner:HUAZHONG UNIV OF SCI & TECH +1
Electrochemical sensor for detecting triclosan, preparation method and application thereof
ActiveCN107328836AImprove electrocatalytic activityLow detection limitMaterial electrochemical variablesTriclosanChemically modified electrode
The invention relates to the technical field of electrochemical detection and particularly discloses an electrochemical sensor for detecting triclosan, a preparation method and an application thereof. The electrochemical sensor adopts a chemically-modified electrode for detecting the triclosan as a working electrode, Ag-AgCl as a reference electrode and a platinum electrode as an auxiliary electrode to form a three-electrode system; and the three-electrode system is assembled, and then is connected with an electrochemical working station to form the electrochemical sensor. The chemically-modified electrode for quantitatively detecting the triclosan and the electrochemical sensor have excellent electrocatalytic activity for the triclosan as well as extremely-low detection limit, good stability, interference resistance and reproducibility.
Owner:湖南角山米业有限责任公司
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