22results about How to "Rapid determination" patented technology

The utility model discloses a device for measuring the dry slag rate of liquid reduced lead. The device comprises a sampling mechanism for sampling reduced lead liquid from a liquid lead bag, and an ingot casting mold for preparing the reduced lead liquid taken by the sampling mechanism into a lead ingot for measuring the oxygen content and the sulfur content so as to calculate the dry slag rate of the reduced lead, the sampling mechanism comprises a sampling rod, a sealing plug matched with the sampling rod for sampling, and a handle connected to the outer wall of the sampling rod; the top end of an inner hole of the sampling rod is in a circular truncated cone shape facilitating installation of the sealing plug. The lower part of the sealing plug is in a big-end-up circular truncated cone shape matched with the top end of the inner hole of the sampling rod; the ingot casting mold is in a hollow cylinder shape with a bottom, and the interior of the ingot casting mold is in a big-end-up circular truncated cone shape so that a circular truncated cone-shaped lead ingot can be cast. The dry slag rate measuring device is simple in structure, rapid in dry slag rate measurement and high in accuracy, solves the problems that a conventional wet lead dry slag rate measurement period is long, measured data are easy to interfere, and measured values have deviation, and can better guide adjustment in the production process.

The invention discloses a sulfydryl-functionalized high-performance chitosan homogeneous membrane which is prepared by taking chitosan and polyvinyl alcohol as substrates, L-cysteine as a modifier and tris (2-carboxyethyl) phosphine hydrochloride as a reducing agent through a non-solvent induced phase inversion method. Therefore, the inventor also establishes a preparation method of the chitosan homogeneous membrane as a binding phase of a thin film diffusion gradient technology. Finally, the thin film material with high adsorption capacity and rapid adsorption on mercury is innovatively prepared, and the DGT device taking the thin film material as a binding phase can rapidly, highly selectively and stably enrich mercury in a water body and is not interfered by other heavy metal ions; the technical problem that a biological membrane grows on the surface of a traditional DGT device due to long-time enrichment to interfere with accurate determination of mercury is successfully solved, the DGT technology is expanded to the field of complex determination of the concentration of trace Hg (II) in water, and the purpose of efficient, rapid and accurate determination is achieved.

The invention provides a spark source atomic emission spectrometry determination method for acid-soluble aluminum and inclusion aluminum, and belongs to the technical field of assessment of inclusions in steel. The spark source atomic emission spectrometry determination method for acid-soluble aluminum and inclusion aluminum comprises the following steps: establishing a calibration curve of all aluminum, then determining integral intensities of inclusion aluminum, all aluminum and acid-soluble aluminum in a sample under corresponding conditions, and calculating the intensity of the inclusion aluminum by using a difference value between the integral intensities; selecting two standard samples with adjacent strength according to the strength of aluminum inclusion in the sample, and calculating a calibration coefficient K according to the aluminum content Al% lt; the excitation rate F is calculated according to the peak integral intensity of the inclusion aluminum and the integral intensity of the total aluminum in the 0.0007% standard sample, the inclusion aluminum content Als% is equal to K * F * (IAlt-IAls), and the content of the acid-soluble aluminum is equal to the difference between the content of the total aluminum and the content of the inclusion aluminum. According to the method, the accuracy of a measurement result is effectively improved while high analysis speed, low cost and simplicity and convenience in operation are ensured.

The application provides a method for online analysis of organic phosphorus and inorganic phosphorus in seawater, comprising: online sampling of seawater samples, establishment of a single-component digestion reaction kinetics analysis model of organic phosphorus and inorganic phosphorus at a characteristic wavelength; construction of a binary analysis model of total phosphorus at t1 or t2 time based on iterative addition of spectral absorbance; establishment of a water body background correction model to calculate the content of phosphate in the water body; coupling of the water body background analysis model to establish a binary analysis correction model of digestible total phosphorus; and continuous measurement of dissolved phosphate, organic phosphorus and digestible inorganic phosphorus in the water body based on the background correction model and the binary analysis correction model, so as to realize online continuous analysis of organic phosphorus, digestible inorganic phosphorus and phosphate components.

The utility model discloses a civil air defense engineering concrete strength rapid measuring device which comprises a supporting table and a hydraulic cylinder, a pressure sensor is fixedly installed at the output end of the hydraulic cylinder, a detection pressing block is fixedly installed at the bottom of the pressure sensor, and a PLC is fixedly installed at the right end of the front surface of the supporting table. A stepping motor is fixedly installed at the upper end of the left side of the outer surface of the supporting table. Through the arrangement of the supporting table, a concrete sample for strength detection required by civil air defense engineering can be supported, and through the arrangement of the hydraulic cylinder, the pressure sensor and the detection pressing block, personnel can conveniently and rapidly measure the compressive strength of civil air defense engineering concrete; meanwhile, through the arrangement of a stepping motor, a two-way screw rod, a moving plate and a protective cover, the periphery of the concrete sample can be effectively and safely protected in the measuring operation process, and concrete chippings are prevented from splashing to the periphery and hurting personnel.

The present application relates to a kind of urban inland river sewage intelligent detection method, comprising the following steps: 1) preparation standard sewage sample, obtain multiple sewage samples with different indicators and different index data;2) the near infrared spectrum data of all sewage samples is collected and pretreated, form near infrared spectrum data set, and be divided into training set and test set;3) construct sewage index quantitative detection model based on convolution neural network, sewage index quantitative detection model is trained and tested by training set and test set;4) collection actual water sample and divide into two parts, respectively by chemometrics and the sewage index quantitative detection model established to predict its key index data, by comparing to verify the accuracy and reliability of the model established;5) using the sewage index quantitative detection model obtained to detect the urban inland river water quality to be detected.The method is conducive to improving the speed and accuracy of urban inland river water quality detection.

The invention relates to the technical field of pharmaceutical analysis, in particular to a method for detecting 2-ethyoxyl benzoyl chloride and related substances thereof, liquid chromatography is adopted for detection, and the related substances are salicylic acid, 2-ethyoxyl benzoic acid, 2-ethyoxyl methyl benzoate and 2-ethyoxyl ethyl benzoate. Chromatographic conditions comprise that octadecylsilane chemically bonded silica is used as a chromatographic column of a stationary phase; a gradient elution procedure is adopted, a mobile phase is composed of a mobile phase A and a mobile phase B, and one of water and a phosphoric acid solution is taken as the mobile phase A; one or more of acetonitrile and methanol are used as a mobile phase B; the elution gradient is 0-35 min, and the volume percentage content of the mobile phase A is 8-80%; 35-40 min, the volume percentage content of the mobile phase A is 8-15%; the volume percentage content of the mobile phase A is 8-80% in 40-41 min; the volume percentage content of the mobile phase A is 70-80% in 41-50 min. The detection method disclosed by the invention is simple and convenient to operate, the solvent is single and easy to obtain, and the method is exclusive and accurate and can be suitable for controlling the quality of the 2-ethoxybenzoyl chloride product.

The invention relates to a battery specific heat capacity measuring method and device, and the method comprises the steps: respectively arranging heating parts on two large surfaces of a to-be-measured battery, and arranging a plurality of temperature sensors and heat flow sensors on the outer surfaces of the heating parts; the method comprises the following steps: wrapping a to-be-tested battery provided with a heating component and a sensor by using a heat insulation material, placing the battery in a temperature-controlled environment, and keeping the initial environment temperature constant; performing a continuous test process on the to-be-tested battery, wherein the test process comprises a heating stage and a cooling stage following the heating stage; in the heating stage, heating lasts for a first preset time until the battery temperature reaches a preset value, and the input total energy is recorded; in the cooling stage, natural cooling lasts for second preset time, and the density of heat flow flowing out of the surface of the battery is continuously measured; calculating the total heat lost to the environment from the to-be-tested battery; and calculating the specific heat capacity of the to-be-measured battery by using the input total energy, the lost total heat, the temperature rise and the mass. According to the invention, the test time is shortened on the premise of ensuring the measurement precision.

This invention provides a method for detecting and calculating the austenite content in steel based on a permeability meter, relating to the fields of steel and electromagnetics. Based on the theoretical differences in saturation magnetization of different phases in ferromagnetic materials, this invention establishes a theoretical calculation model and detection method for measuring austenite content using a permeability meter. A standard-prepared sample is placed in a magnetic pole shoe, and the magnetic field strength H corresponding to the maximum permeability of the ferromagnetic material is first measured. μ Then at ≥1.5H μ Under a magnetic field strength of J, the polarization intensity of the magnetic field strength at multiple points was measured at continuous intervals. m Then, based on the saturation magnetization approximation law and derivation law, the saturation magnetization Js is fitted and solved. Finally, the austenite content is determined according to the theoretical calculation model of austenite content. The method described in this invention solves the influence of the constantly changing effective magnetic path length of traditional magnetometers on the measurement results. The method for determining austenite content is simple, has a solid theoretical basis, high measurement accuracy, and strong data repeatability.

The present application belongs to the field of enzyme activity determination method, aiming at the problems of existing pectinase activity determination technology, such as complicated operation, low sensitivity, and the problems of existing MBTH method for determining pectinase activity, such as a large amount of precipitate in the chromogenic product solution and the high background value of the chromogenic product, the present application provides a kind of determination method of pectinase activity: a series of concentration gradient galacturonic acid standard solution is prepared by using substrate solution, the precipitate is provided by using alkaline reagent to provide high concentration alkaline environment, and the precipitation of precipitated material is accelerated by using low temperature condition, then the supernatant is obtained by centrifugation, MBTH reaction is carried out, the absorbance value is determined, and the standard corresponding relationship curve is drawn; Pectinase enzymolysis reaction; preparation of enzymolysis blank; the initial speed of the concentration of reducing end group produced by the enzymolysis of the substrate per unit time is determined to calculate the enzyme activity of pectinase. The method is accurate, reliable, good in repeatability, high in sensitivity and stable in chromogenic product.

The utility model discloses a kind of quick determination devices of pore membrane to suspended substance tolerance limit in mine wastewater, including simple hollow fiber membrane assembly and test system;Test system includes magnetic stirrer and stirring vessel;Test system includes water outlet unit, and water outlet unit includes water outlet pipe and water outlet pump, water outlet pipe one end is inserted into stirring vessel, and simple hollow fiber membrane assembly is installed in water outlet pipe one end inserted into stirring vessel;Simple hollow fiber membrane assembly includes multiple hollow fiber membrane filaments, and both ends of hollow fiber membrane filament are connected with capillary, and hollow fiber membrane filament is bent into U shape, and capillary is communicated with water outlet pipe.The utility model presents the quick determination device of pore membrane to suspended substance tolerance limit in mine wastewater, adopt simple membrane assembly to cooperate test system, real-time monitoring transmembrane pressure difference change, when transmembrane pressure difference reaches critical value, record running time, combine water outlet flux, suspended substance tolerance limit of pore membrane can be calculated, realize quick determination pore membrane suspended substance tolerance limit.

The invention provides a determination method for rapid screening of plastic part color masterbatch carcinogenic dyes, and the determination method for rapid screening of plastic part color masterbatch carcinogenic dyes comprises the following steps: crushing a plastic sample, adding the crushed plastic sample into dichloromethane, carrying out swelling and decoloration, and carrying out ultrasonic extraction to obtain a swelling mixed solution; adding methylbenzene into the swelled mixed solution to swell and decolor, and performing ultrasonic extraction and concentration to obtain a concentrated extract; adding the concentrated extract into a methanol precipitator, and separating to obtain a precipitate mixed solution; and eluting the precipitate mixed solution through an activated alumina small column, drying, and re-dissolving in methanol to obtain a to-be-detected solution, and analyzing by using a liquid chromatograph-mass spectrometer. Dye molecules are selectively released through step-by-step swelling of dichloromethane and toluene, so that the extraction effect of the color masterbatch dye in the plastic is improved; through combination of step-by-step solvent synergistic swelling extraction and multi-stage purification, drying of polymer dissolved impurities is avoided, and efficient and accurate extraction and determination of the plastic color masterbatch dye are realized.

This invention belongs to the field of chemical analysis technology, specifically relating to a method for separating three components in DOPA / benzisazol tablets and detecting their content and dissolution rate. The method uses a chromatographic column packed with octylsilane-bonded silica gel, employing a mobile phase of a mixed solution of sodium dihydrogen phosphate buffer, methanol, and sodium heptanesulfonate for isocratic elution, sequentially separating levodopa, benzyl hydrochloride, and benzyl hydrochloride impurity B. The separated components are then detected using a UV detector. Specifically, the detection wavelength for levodopa is 280 nm, and the detection wavelengths for benzyl hydrochloride and benzyl hydrochloride impurity B are 220 nm. This method can separate levodopa, benzyl hydrochloride, and benzyl hydrochloride impurity B within 15 minutes, and can achieve quantitative analysis and dissolution rate detection of levodopa and benzyl hydrochloride. This method is highly specific, has a short analysis time, good stability, good accuracy, high repeatability, and is simple and feasible to operate.

This invention provides an intelligent detection method for perfluorinated compounds based on upconversion fluorescent silicon dot molecularly imprinted polymers. The upconversion fluorescent silicon dot molecularly imprinted polymers specifically recognize perfluorinated compounds; in the presence of PFOA or PFOS, the fluorescence of the molecularly imprinted polymer is quenched or enhanced. Combined with a portable UV device, the RGB values ​​of the molecularly imprinted polymer-perfluorinated compound system are acquired, converted, or detected using a smartphone platform, and the blue fluorescence signal under 700 nm excitation is analyzed, enabling rapid and highly sensitive detection of PFOA and PFOS in environmental water and food. The method for detecting perfluorinated compounds in environmental water and food based on a smartphone sensing platform using upconversion fluorescent silicon dot molecularly imprinted polymers, as constructed in this invention, has advantages such as simple operation, rapid feedback, high sensitivity and repeatability, high stability, and high accuracy. It can intuitively and in real-time achieve rapid determination of perfluorinated compounds in simple systems, broadening the application directions in environmental monitoring.

The invention relates to a method for rapidly measuring the content of phosphorus in a sodium ferric phosphate-based material, which comprises the following steps: weighing a sodium ferric phosphate-based material sample to be measured, adding carbon quantum dots, grinding and uniformly mixing to obtain mixed powder; adding the mixed powder into a hydrochloric acid solution, heating for dissolving, cooling and filtering to obtain a solution to be detected; taking a part of the solution to be detected, adding a nitric acid solution, heating, adding an excessive amount of a quimocilidone reagent while stirring in a slightly boiling state of the solution, preserving heat, aging, cooling to room temperature, and carrying out solid-liquid separation to obtain a first precipitate; washing the first precipitate with water until the first precipitate is neutral, and drying the first precipitate to constant weight; according to the sequence of the steps S1-S4, a blank experiment is carried out without adding the sodium ferric phosphate-based material, and a second precipitate is obtained; calculating the phosphorus content in the sodium ferric phosphate-based material according to a formula; according to the method, the content of phosphorus in the sodium ferric phosphate-based material can be effectively and rapidly determined, and the result is accurate and reliable.

The invention relates to the technical field of corrosion detection, in particular to an acid corrosion resistance test method for measuring hydrogen sulfide concentration based on inductively coupled plasma emission spectroscopy, which comprises the following steps: S1, sample preparation and treatment; s2, preparing an acidic sulfur-containing test solution; s3, acid corrosion resistance test: before the test is started and after the test is finished, quantitatively extracting a test solution, neutralizing the test solution with sodium hydroxide, determining the spectral intensity of the to-be-tested solution by using an inductively coupled plasma emission spectrometer, and calculating the concentration of sulfur ions in the solution according to the drawn sulfur ion calibration curve; s4, calculating the hydrogen sulfide concentration before and after the test; and S5, performing corrosion evaluation. In the test, the hydrogen sulfide concentration is rapidly measured, the sensitivity is high, and the reproducibility is good. The method avoids the problems of H2S volatilization loss and complex operation in the traditional method, and is suitable for evaluating the corrosion performance of various metal materials in the H2S-containing acidic environment.

The invention discloses an iodine impurity detection method based on inductively coupled plasma mass spectrometry, which adopts a diluent of a tetramethylammonium hydroxide system and a specific sample pretreatment process to effectively stabilize an iodine element and reduce a memory effect. Indium (In) is used as an internal standard, and detection is carried out in a collision reaction tank mode (He), so that the analysis accuracy, stability and anti-interference capability are remarkably improved. According to the detection method disclosed by the invention, the sample pretreatment process is simple and rapid, mild acid dissolution is combined with dilution of the diluent, so that the sample can be completely dissolved, the matrix effect can be reduced to the minimum, the linear relation is good, the precision is high, and the specificity is strong; the method is suitable for rapid and accurate determination of trace iodine impurities (the limit is not more than 50 [mu] g / g) in drugs and pharmaceutic adjuvants.

The application discloses a kind of feed in enoxamium, pyrimethanil and / or triazolopyrimidines novel herbicide determination method and application.Belongs to pesticide residue detection technical field.The application provides a kind of feed in enoxamium, pyrimethanil and triazolopyrimidines novel herbicide determination method, based on dispersive solid phase extraction pretreatment technology, without solid phase extraction column, and the reagent cost used is low, realizes the effective purification and enrichment of three kinds of novel herbicides, combined with ultra-high performance liquid chromatography tandem mass spectrometry UPLC-MS / MS can be quickly, accurately determine whether the animal feed contains pyrimethanil, enoxamium and triazolopyrimidines herbicide and corresponding residual amount, the method is high in sensitivity, good in special property, detection result is accurate and reliable, for enoxamium, pyrimethanil and triazolopyrimidines this three kinds of novel herbicide simultaneous detection provides technical support.

A method for rapid detection of BDOC in water supply networks using biofilm sensing based on electrochemical impedance spectroscopy is disclosed, relating to the field of BDOC detection as a water quality biological stability indicator. This invention aims to achieve rapid, in-situ, and non-destructive detection of BDOC in water, thereby reflecting the biological stability of pipeline water quality. The method is based on the linear relationship between the Ct ratio and the concentration of biodegradable dissolved organic matter (BDOC) in water. This relationship can be used to plot a curve fitting equation. Following the same measurement process, the capacitance of the biofilm growing in the actual water sample is measured, and the BDOC concentration in the water sample is calculated by substituting this value into the curve fitting equation. This method enables rapid BDOC measurement; secondly, it uses biofilm capacitance to more comprehensively reflect BDOC and water quality biological stability; and it can be used in water supply networks to achieve in-situ, non-destructive online monitoring of BDOC in water supply networks using electrochemical impedance spectroscopy.

The invention provides a method for detecting the purity of benzoyl galanthamine, which comprises the following steps: A) dissolving a benzoyl galanthamine sample to be detected by adding a solvent to obtain a test solution; dissolving a benzoyl galanthamine reference substance in a solvent to obtain a reference substance solution; b) determining the test solution and the reference solution by high performance liquid chromatography to obtain a chromatogram of the test solution and a chromatogram of the reference solution; and performing qualitative and quantitative determination on the benzoyl galanthamine in the chromatogram of the test sample according to the chromatogram of the reference substance, and calculating to obtain the purity of the benzoyl galanthamine. Chromatographic conditions of the high performance liquid chromatography are as follows: a chromatographic column is a C18 column; a mobile phase A is a phosphate methanol buffer solution, a mobile phase B is acetonitrile, and gradient elution is carried out. The method for detecting the purity of the benzoyl galanthamine through liquid chromatography is provided for the first time, and the method is high in specificity, good in operability, good in accuracy, linearity, precision and durability and capable of achieving rapid determination of the purity of the benzoyl galanthamine.

The application discloses a preparation method and application of a supramolecular fluorescent probe for detecting aliphatic biological amine in water, wherein the supramolecular fluorescent probe is constructed by taking symmetrical tetramethyl six-membered cucurbituril (TMeQ[6]) as a host and 2-(2-pyridyl)benzimidazole as a guest, and the supramolecular fluorescent probe is used for recognizing aliphatic biological amine. The host-guest supramolecular fluorescent probe with a molar ratio of 1:1 is formed by TMeQ[6] and 2-(2-pyridyl)benzimidazole, and the specific recognition of aliphatic biological amine (putrescine, cadaverine, spermine and spermidine) is proved by ultraviolet-visible spectroscopy, fluorescence spectroscopy and nuclear magnetic titration under the condition of water solution medium, so that the supramolecular fluorescent probe can be applied to the detection of biological amine in water solution. The supramolecular fluorescent probe has the characteristics of low analysis cost, simple operation, high sensitivity and rapidness, strong anti-interference ability and the like.