86 results about "Ion selective electrode" patented technology

The invention discloses an intelligent nutrient circulation regulation and control method for a morchella esculenta fruit forest intercropping system based on the Internet of Things, particularly relates to the technical field of intelligent agriculture, and is used for solving the problem of symbiosis imbalance of hyphae and fruit trees caused by nutrient regulation and control lag and static threshold setting in the prior art. Hypha density, electric signal dominant frequency and root system absorption rate data are collected in real time through a multispectral impedance sensor and an ion selective electrode array, and a space-time aligned dynamic matrix is constructed; dynamically updating a nutrient balance threshold value based on a real-time ratio of a hypha metabolism rate to an absorption rate, and generating a nutrient transfer priority by combining collaborative analysis of a hypha transfer direction included angle and an electric signal main frequency offset gradient; a continuous transfer path is identified through a region growing algorithm, water and fertilizer amounts are distributed according to priorities, and a local area instruction is generated; and inverting the equipment response delay by using the high-frequency pulse signal, synchronously adjusting the execution frequency and updating the dynamic matrix and the threshold parameter, thereby realizing the dynamic adaptation and autonomous optimization of the nutrient supply and demand of the intercropping system.

The invention discloses an ancient tree health state monitoring method based on digital twinning, and relates to the field of ancient tree health monitoring, and the method comprises the steps: collecting point cloud data and texture data of an ancient tree, and constructing an initial three-dimensional model of the ancient tree; a micro ion selective electrode array is deployed in an ancient tree root distribution area, Ca2 and K + ion flow velocity changes are detected through a constant potential rectifier, and the mycorrhizal symbiosis index is calculated in combination with soil temperature and humidity data; uploading the mycorrhizal symbiosis index to a digital twinborn body, and displaying the active state of a root system area in an initial three-dimensional model of the ancient tree in a three-dimensional thermodynamic diagram form; a 16-channel MOX gas sensor electronic nose array is installed on the surface of a trunk of an ancient tree, and volatile organic compound (VOC) concentration data of the ancient tree are collected. According to the invention, a micro electrode array with a 45-degree inclination angle is adopted to non-destructively monitor the ion flow velocity of a root system through the mycorrhizal symbiosis index detection unit, and a three-dimensional thermodynamic diagram is generated in combination with an inverse distance weighted interpolation algorithm, so that dynamic visualization of underground mycorrhizal activity is realized.

An ion sensor is disclosed that includes an ion selective electrode including a first internal solid layer including a first insertion material, and a first ion conductive ceramic, an ion selective membrane provided on the first internal solid layer, a reference electrode including a second internal solid layer including a second insertion material, and a second ion conductive ceramic, an ionic liquid containing membrane provided on the second internal solid layer, and an insulator on which the ion selective electrode and the reference electrode are arranged.

The invention discloses an anionic surfactant and a preparation method and application thereof.The anionic surfactant has a double-wedge-shaped molecular structure, alkaline earth metal benzene sulfonate serves as a polar hydrophilic wedge tip, a long-chain alkoxy flexible chain segment serves as a hydrophobic wedge group, the surface tension of water can be remarkably reduced in an aqueous solution, and the anionic surfactant has excellent emulsifying capacity. The molecular structure is based on alkaline earth metal benzene sulfonate and has good thermotropic and lyotropic liquid crystallinity, the liquid crystal phase temperature range of the molecular structure exceeds 140 DEG C, and the phase transition temperature and the mesogenic state temperature range can be controlled by adjusting the number of carbon atoms of an alkoxy substituent. When in a mesogenic state, the molecules can form a supramolecular columnar phase through self-assembly aggregation, and the columnar structure can form a transmission channel with ion recognition in the column center direction. By utilizing the characteristic, a novel bionic ion selective conduction membrane can be constructed, and the biomimetic ion selective conduction membrane has wide application potential in the aspects of preparation of ion selective electrodes and chemical sensors and the like.

The invention relates to a method for simultaneously detecting fluorine and chlorine contents in lead concentrate by an ion selective electrode method, and belongs to the technical field of new material detection, and the method specifically comprises the following steps: (1) preparing a sample into a to-be-detected solution; (2) preparing a fluorine ion electrode standard solution and a chloride ion electrode standard solution; (3) calibrating a fluorine ion standard solution and a chloride ion standard solution; and (4) sample determination and data processing. According to the combined measurement method provided by the invention, through a layered coverage method, optimization of the ratio of potassium hydroxide to potassium nitrate and gradient temperature rise, on the premise of ensuring data quality, an accurate result is conveniently obtained; compared with a fluorine or chlorine testing method commonly used in the market, the method is short in time consumption, simple in equipment and accurate in data; in addition, the combined detection method provided by the invention breaks through the pH limit of traditional single ion detection, and provides a reliable solution for synchronous determination of fluorine and chlorine in a complex matrix sample.

Provided is an all-solid-state ion-selective electrode capable of further stabilizing a measurement value. The all-solid-state ion-selective electrode includes a working electrode and an ion responsive membrane, the all-solid-state ion-selective electrode includes an ion-electron conversion layer disposed between the working electrode and the ion responsive membrane and electrically connecting the working electrode and the ion responsive membrane to each other, and the ion-electron conversion layer contains an ion-electron conversion substance and a polymer or contains a polymer having an ion-electron conversion function.

The application relates to the field of electrochemistry, in particular to a method for determining ion concentration based on a double electrolytic cell ion selective electrode, which comprises the following steps: using a poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid) modified glassy carbon electrode or a reduced graphene oxide modified glassy carbon electrode as a working electrode, using a full solid-state ion selective electrode as a reference electrode, and using a platinum wire electrode as a counter electrode; inserting the working electrode and the counter electrode into a test electrolytic cell, inserting the reference electrode into a sample electrolytic cell, connecting the test electrolytic cell and the sample electrolytic cell through Ag / AgCl as a salt bridge, and determining the ion concentration in a to-be-measured solution by adopting a constant potential coulomb analysis method. The technical scheme of the application can minimize the current response time while ensuring the accuracy of ion concentration determination, realizes rapid measurement of ion concentration, and can be applied to detection of ion concentration in human serum.

The invention discloses a method for determining the content of sulfate radicals in a water sample. According to the method, a calcium ion selective electrode is selected as an indicator electrode through a full-automatic potentiometric titration method, the amount of EDTA consumed by Ca < 2 + > and Mg < 2 + > in a to-be-detected water sample and the amount of EDTA consumed by Ba < 2 + > in a blank solution are respectively measured by using an EDTA standard solution, and then the previously titrated blank solution containing Ba < 2 + > which is excessive relative to the content of SO4 < 2-> in the to-be-detected water sample is added into the to-be-detected water sample; and measuring the content of excessive Ba < 2 + > by using an EDTA standard solution, and calculating to obtain the content of SO4 < 2-> in the water sample to be measured. The method is suitable for measuring the content of sulfate radicals in a water sample with high content of calcium, magnesium ions and sulfate radicals, and has the advantages of simple detection method, low cost and high practical value.

The present invention provides an antifouling lead ion selective electrode prepared using dendritic polypeptides, which belongs to the technical field of marine pollution detection. The present invention first electrodeposit polyaniline (PANI) nanowires on a glassy carbon substrate to form a GC / PANI substrate, then prepare MXene nanosheets and composite them with PANI to form GC / PANI-MXene, and then drop lead ion carrier Pb onto the GC / PANI-MXene. 2+ ‑ISM, and finally the electrode surface was modified with dendrimer peptides to obtain GC / PANI‑MXene / Pb 2+ -ISM / pep electrode. The electrode prepared by the present invention can inhibit the adhesion of nonspecific microorganisms and has excellent stability.

The invention discloses a preparation method and application of an all-solid-state ion selective microelectrode, and belongs to the field of ion selective electrodes. A composite material with the mass ratio of super-hydrophobic carbon nanotubes to CoWSe2 being 3: 1 is used as an ion-electron transduction layer material for constructing the all-solid-state ion selective microelectrode, and a nitrate ion selective polymer film or a hydrogen ion selective polymer film is respectively dispensed on the surface of the transduction layer; and drying to obtain the all-solid-state nitrate ion selective microelectrode or all-solid-state hydrogen ion selective microelectrode. According to the method disclosed by the invention, the all-solid-state ion selective microelectrode can more effectively inhibit the formation of a water layer, so that the microelectrode has better potential stability and longer service life when being applied to the detection of ions in an environmental water body sample.

This invention discloses an anion-selective electrode, its preparation method, and its application. The anion-selective electrode consists of two electrodes with different loading amounts, each on a conductive substrate loaded with a metal / a sparingly soluble metal salt. The preparation method involves first depositing a large amount of metal on a conductive substrate, then using it as the anode and electrolyzing it for a long time in an anion solution containing anions capable of forming the sparingly soluble metal salt, resulting in an electrode composed of a large amount of metal and its sparingly soluble salt. Then, a small amount of metal is deposited on another conductive substrate, which is then used as the anode and electrolyzed for a short time in the same anion solution, resulting in an electrode composed of a small amount of metal and its sparingly soluble salt. The two electrodes form an electrode pair. The selective electrode of this invention consists of a pair of electrodes, exhibiting uniform size, high specific surface area, and abundant active sites. Compared with traditional electrodes, it is smaller in size. The preparation method is simple and reliable. When applied to fields such as anion detection, it demonstrates high selectivity and sensitivity, making it suitable for widespread application.

The invention relates to the technical field of inorganic salt mother liquor treatment, in particular to an inorganic salt mother liquor recycling system based on MVR evaporative crystallization, which comprises three groups of sedimentation tanks and separation cylinders fixedly communicated with the bottoms of the sedimentation tanks, stirring components and sealing conical seats are arranged in the separation cylinders, and the tops of the sedimentation tanks are connected with liquid storage hoppers through liquid inlet pipes. An electromagnetic control valve is arranged on the liquid inlet pipe, and a calcium hydroxide solution, a sodium carbonate solution and a barium chloride solution are sequentially arranged in the multiple liquid storage hoppers from left to right; through staged treatment of the three groups of sedimentation tanks, the ion selective electrode sensor and the controller are combined to precisely add corresponding agents, the hetero ions are removed step by step in a targeted manner, and the subsequent progressive deep purification treatment is matched, so that a high-quality water quality basis is provided for efficient recycling of the mother liquor; and the problems of crystal quality reduction, equipment scaling and the like caused by hetero-ion enrichment are effectively avoided.

The application discloses a hemodialysis machine dialysate potassium ion real-time automatic regulation system and belongs to the technical field of medical equipment, which solves the problem of how to accurately regulate the potassium ion concentration in the dialysate of a hemodialysis machine. The man-machine interface of the host computer mainly comprises blood potassium concentration display, regulation system function selection and lower computer function setting functions. The lower computer controller mainly completes the cooperative control of the clamping valve and the peristaltic pump, realizes the function control of the electrode, and, combined with the real-time optimal regulation strategy solved by the nonlinear MPC control algorithm, realizes the switching selection of dialysate with different potassium ion concentrations by electromagnetic valve driving control. The ion selective electrode is adopted to realize the real-time sampling detection of the potassium ion concentration in blood, and the control of the peristaltic pump and the rotary clamping valve is combined to realize the calibration, cleaning and activation of the electrode. The application realizes the real-time switching of dialysate with different potassium ion concentrations and completes the accurate regulation of dialysate with different potassium ion concentrations in the dialysis process.

The invention discloses a method for determining the content of a nickel element in ferronickel, which mainly comprises the following steps: dissolving a ferronickel sample with hydrochloric acid, nitric acid and hydrofluoric acid under the condition of microwave digestion, firstly determining the content of the cobalt element in a test solution by adopting inductively coupled plasma emission spectrometry, secondly taking the test solution and adding a masking agent to mask interference elements, a copper ion selective electrode is used as an indicator electrode, an Ag / AgCl electrode is used as a reference electrode, a Cu-EDTA solution is used as an indicator, EDTA is used as a titrant, the content of nickel and cobalt elements in a sample is calculated according to the consumption of an EDTA standard titration solution, and finally the content of the nickel element can be obtained by deducting the content of the cobalt element from the content of the nickel and cobalt elements. The method solves the problem of determination of the nickel element in ferronickel, improves the precision and accuracy of analysis and measurement, and is rapid in measurement and simple and convenient to operate.

The invention discloses a maintenance-free online measurement system and method for key parameters of desulfurization slurry of a power plant, an outlet of a desulfurization slurry pipeline is divided into two paths after passing through a desulfurization slurry electromagnetic valve, one path is communicated with an inlet of a ceramic membrane filter, and the other path is communicated with a flushing water pipeline through a conventional flushing water electromagnetic valve; the flushing water pipeline is communicated with a water outlet of the ceramic membrane filter through the backwashing water electromagnetic valve, the water outlet of the ceramic membrane filter is communicated with an inlet of the chloride ion flow cell, and a water outlet of the chloride ion flow cell is communicated with an inlet of the pH flow cell; the pH flow cell is internally provided with a pH selective electrode, the chloride ion flow cell is internally provided with a chloride ion selective electrode, the system and the method can realize real-time measurement of chloride ions and pH of slurry, and the accuracy and the stability are relatively high.

The invention provides a hollow ion selective electrode and application thereof, a front conductive circuit (2) and an electrode loading area (1) are arranged on the front surface of a substrate, the front conductive circuit (2) is provided with a via hole (24), and the electrode loading area (1) comprises an electrode detection layer and a first hollow hole (13) penetrating through the substrate; the back surface of the substrate is provided with a first hollow hole (13) and a back surface conductive circuit (4), the back surface conductive circuit (4) is provided with a via hole (24), and the front surface conductive circuit (2) and the back surface conductive circuit (4) are connected with each other through the via hole (24); an insulating double-sided adhesive tape (41), a selective electrode patch (42) and a conductive adhesive tape (43) are arranged on the back surface of the substrate, the selective electrode patch (42) is tightly attached to the substrate through the insulating double-sided adhesive tape (41), the conductive adhesive tape (43) is arranged above the selective electrode patch (42), and the selective electrode patch (42) is fixed on the back surface of the substrate and is in contact conduction with the back surface conductive circuit (4).

An ion-selective electrode includes: an ion-sensitive layer containing an ion-sensitive substance; and a solid, in which at least a part of a surface of the solid is coated with the ion-sensitive layer, the ion-sensitive substance has a crown ether structure formed of at least two or more repeating units represented by Formula (a):—CR1R2—CR3X—O—  (a)where X is an organic group having an alkoxysilyl group at a terminal, R1, R2, and R3 are each a hydrogen atom or a hydrocarbon group, and R1 or R2 may be bonded to X, and at least one of the alkoxysilyl groups of the crown ether structure reacts to be bonded to at least a part of the surface of the solid.

The utility model provides an ion selective electrode structure, which comprises a shell, a plurality of holes are arranged at one end of the shell, the outer surface of one end of the shell is communicated with the inner surface of one end of the shell through the plurality of holes, and the diameter of each hole is 0.1 mm-0. 8mm; and the ion-selective membrane is cured and formed at one end, provided with the multiple holes, of the shell, and the ion-selective membrane covers and is embedded into the multiple holes so as to be exposed to the outer side of the ion-selective electrode structure through the holes. According to the utility model, liquid leakage can be reliably prevented, and the sealing effect is better.

The present application relates to the field of plant factory water culture, and specifically discloses a kind of plant factory three-dimensional cultivation automatic liquid supply equipment and hierarchical compensation control method, including independent liquid supply unit, comprising: a pneumatic sensing assembly, with a closed flexible sensing capsule inside encapsulating low-boiling working medium, the sensing capsule is configured to respond to the microenvironment humidity change caused by crop transpiration in the cultivation layer. The plant factory three-dimensional cultivation automatic liquid supply equipment and hierarchical compensation control method, through the mechanical combination of transpiration-condensation sensing capsule and nonlinear cam differential proportional valve, realizes the passive, real-time, independent compensation of the different water and fertilizer requirements of each layer of three-dimensional cultivation, and gets rid of the dependence on expensive and frequently maintained online ion selective electrode.

The utility model relates to a device for detecting the content of sodium persulfate in copper dissolving liquid and a water electroplating device, and the detection device comprises a detection container, a silver ion selection electrode, a controller and a copper ion concentration detection component, the first conveying part is used for conveying copper dissolving liquid, the second conveying part is used for conveying silver nitrate standard liquid, the third conveying part is used for conveying potassium iodide standard liquid, at least the silver ion selection electrode and the second conveying part are electrically connected with the controller, and the silver ion selection electrode is arranged in the detection container and used for detecting silver ions in the detection container. The silver ion selection electrode transmits a detection signal to the controller, and the controller is used for controlling starting and stopping of the second conveying part according to the received signal; the measuring method is simple and reliable, the content of the sodium persulfate in the copper dissolving liquid can be effectively detected, the concentration of the sodium persulfate in the copper dissolving tank in the water electroplating device can be monitored in real time, the sodium persulfate is supplemented into the copper dissolving tank in time, and the copper dissolving capacity of the copper dissolving liquid in the copper dissolving tank is guaranteed.

An ion-selective electrode with higher stability and a manufacturing method thereof are provided. A potassium ion-selective solid-state electrode comprises a conductor, an insert material formed on a conductor surface, and a potassium ion-sensitive membrane covering the insert material. The insert material is a mixed material containing Prussian blue analog particles and conductive material particles. The Prussian blue analog particles are represented by the structural formula K x Fe[Fe(CN)6] y ·nH2O. The Prussian blue analog particles have, at least in part, a monoclinic crystal structure, and x is a number greater than or equal to 1.5 and less than or equal to 2, y is a number greater than 0 and less than or equal to 1, and n is a number greater than or equal to 0.

The invention relates to a heavy metal waste liquid electro-deposition cyclic utilization treatment method which comprises the following steps: establishing an interface charge migration model based on waste liquid ion composition and a polarization curve, and quantifying migration impedance characteristics of Cu < 2 + >, Zn < 2 + > and Ni < 2 + >. Through progressive potential scanning, ions are subjected to gradient deposition according to migration resistance, preferential adsorption and reduction are induced through pulse frequency adjustment, and a metal reduction potential window is matched. A movable electrode structure is adopted to transversely move a deposition reaction area on a microscale, and reverse high-frequency pulses are applied in a deposition intermittent period or an electrode migration period to trigger stripping and crystallization of a metal deposition layer and removal of a passivation layer. And continuously depositing the electrode to form a dynamic circulation closed loop. A micro conductivity / ion selective electrode sensor array is integrated, and the concentration and intensity distribution of residual heavy metal ions in the waste liquid are evaluated. The concentration mode is switched according to the sensing result, and the optimized concentration reaches a redeposition threshold value. The AI scheduling system controls the reflux proportion of the concentrated solution, ensures the concentration matching reflux, improves the treatment efficiency and reduces the waste.

The invention relates to the technical field of ion selective electrode materials, and particularly discloses a functional polymer film for a chloride ion selective electrode and a preparation method of the functional polymer film. The functional polymer film comprises a polymer skeleton and a covalently grafted nitrogen-containing basic functional group, the polymer skeleton is selected from polyvinyl chloride, carboxylated polyvinyl chloride and other polymers, and the nitrogen-containing basic functional group is a tertiary amine group or an arylamine group and is connected with the skeleton through an amido bond, an ester bond or a polymeric chain segment. Converting into a quaternary ammonium salt structure through a quaternization reagent; the preparation method comprises the following steps: firstly, carrying out catalytic grafting reaction on the functional monomer and the polymer skeleton in an organic solvent through an initiator, then carrying out spin coating or curtain coating to form a film, drying, activating and finally carrying out quaternization treatment. The composition can be used for constructing a long-acting chloride ion selective electrode, and has the advantages of zero dissolution of an ion carrier, high selectivity and strong mechanical stability; in addition, the preparation method provided by the invention can realize controllable distribution of sites.

The invention relates to a method for accurately determining the content of calcium fluoride in calcium fluoride sludge, and belongs to the technical field of industrial waste component analysis. The method comprises the following steps: firstly, carrying out first-step dissolution on a treated sludge sample by using a hot hydrochloric acid-acetic acid solution under ultrasonic assistance so as to selectively remove interference impurities such as calcium sulfate and calcium phosphate to obtain a first filtrate; then, the insoluble substances are subjected to second-step boiling dissolution with a hydrochloric acid-sulfuric acid-boric acid solution, so that the main body calcium fluoride is thoroughly leached out, and second filtrate is obtained; respectively fixing the volumes of the two filtrates, determining the content of fluorine ions in the first detection solution by adopting an ion selective electrode method, and determining the content of calcium ions in the second detection solution by adopting an EDTA titration method. Finally, through a calculation formula integrating measured data of fluorine ions and calcium ions, the calcium fluoride loss in the pretreatment process is automatically corrected, and therefore the content of calcium fluoride in the calcium fluoride sludge is accurately calculated. The method effectively solves the problem that the determination result is virtually high due to impurity interference in the existing national standard method, and has the advantages of high accuracy and strong practicability.

The invention belongs to the technical field of industrial water analysis of copper smelting enterprises, and particularly relates to a method for measuring the content of chloride ions in production wastewater. The method comprises the following steps: adding an ionic strength regulator into a sample to maintain constant ionic strength, preparing a series of chloride ion standard solutions, measuring the potential value of chloride ions by using an ion meter, and making a standard working curve by using the negative logarithm of the chloride ion concentration as a horizontal coordinate and the potential value as a vertical coordinate; and checking the chlorine content in the standard working curve according to the potential value of the sample. The method has the beneficial effects that compared with a silver nitrate titration method, the ion selective electrode method for measuring the production wastewater is higher in accuracy and precision, less in interference and high in analysis speed. Poisonous and harmful reagents are prevented from harming the health of workers and the environment, and accurate and reliable instructive data can be provided in actual production.

The application discloses a kind of full solid-state calcium ion selective electrode based on high hydrophobic copper sulfide and its preparation method and application.It includes the transduction layer coated on the surface of electrode, the preparation of the material of transduction layer includes: copper source, CTAB is dissolved into anhydrous ethanol, then sulfur powder is added, and the mixture is uniformly dispersed by ultrasonic;The material of transduction layer is obtained by carrying out solvothermal reaction to the mixed solution and post-treatment to the reaction precipitate.The application adopts one-step solvothermal method to control CuS by adding different amounts of CTAB surface hydrophobicity, prepares different nano-structure CuS-CTAB as transduction layer modification to glassy carbon electrode surface, and constructs calcium ion selective membrane on its surface to build calcium ion selective electrode with CuS-CTAB as transduction layer.CuS-CTAB has large specific capacitance and excellent hydrophobicity, and as transduction layer, it can accelerate the ion-electron conduction rate, inhibit the formation of interface water layer, and improve the stability of electrode potential.

The invention discloses equipment for detecting milk electrolyte and conductivity, and belongs to the technical field of medical instruments. The equipment is technically characterized by comprising a sample adding system, a sample conveying track, a control module and a detection main body, the sample adding system is composed of a telescopic arm provided with an encoder, a feeding pipe and a sample adding needle, and accurate sample adding is achieved. The sample conveying track guarantees stable conveying of samples through the steering conveying mechanism, the conveying belt and the sample adding frame. The control module is internally provided with a high-performance microprocessor and a memory and is responsible for processing instructions and data. The detection main body integrates a sample processing module, an ISE module, a calcium ion determination module and a flow conductivity determination module, and performs detection by using ultrasonic waves, an indirect ion selective electrode method, an atomic absorption spectrometry and a conductivity electrode method respectively. According to the device, direct and simultaneous detection of electrolyte and conductivity in non-uniform solutions such as milk is realized, the detection efficiency is remarkably improved, and the misdiagnosis rate is reduced.

The application discloses a high-sensitivity ammonium ion electrochemical sensor and application thereof, and belongs to the technical field of electrochemical sensors.The electrochemical sensor comprises a full-solid-state ammonium ion selective electrode, the electrode comprises an electrically conductive base, a solid-state contact layer and an ammonium ion sensitive film arranged in sequence, the electrically conductive base is a silk screen printed carbon electrode with copper nanoparticles on the surface; the solid-state contact layer is composed of a polyaniline and reduced graphene oxide composite; and the composition of the ammonium ion sensitive film comprises polydopamine and an ammonium ion carrier.The characteristics of the above-mentioned modified materials expand the linear detection range of the sensor to ammonium ions, improve the sensitivity, and can sensitively detect 10 ‑7 ~ 10 ‑1 M ammonium ion concentrations, and have good application prospects in the fields of on-site rapid detection of low-concentration ammonium ions in environmental water, aquaculture water and seawater.

Provided is an electrolyte analysis device capable of early detection of abnormalities in an ion-selective electrode, and an abnormality determination method therefor. The electrolyte analysis device according to the present invention includes an ion-selective electrode that generates a sample potential corresponding to the concentration of ions contained in a sample; a comparison electrode that generates a reference potential serving as a reference; and a concentration calculation section that calculates the concentration of ions based on the potential difference between the sample potential and the reference potential, characterized by further including an abnormality determination section that determines the presence or absence of an abnormality based on an evaluation value calculated using a detergent potential, which is a potential generated by the ion-selective electrode when a detergent is supplied.

The invention belongs to the field of potentiometric anti-fouling sensors, and particularly relates to a humic acid interference resistant polymer membrane ion selective electrode as well as preparation and application thereof. The selective electrode is formed by sequentially adhering a polymer sensitive film and a protective layer to the bottom of an electrode substrate; wherein the protective layer is a polyvinylidene fluoride coating. By virtue of the characteristics of low surface energy, strong electronegativity and compact film formation of the polyvinylidene fluoride coating, the infiltration and adhesion of humic acid on the surface of the electrode film are reduced, and the humic acid is effectively prevented from entering the polymer film, so that the stability and the service life of the polymer film ion-selective electrode in complex environmental water application are improved.