405results about How to "Analytical results are reliable" patented technology

The invention relates to an iron alloy fusing sample preparation method for X-ray fluorescence spectrum analysis, belonging to the technical field of materialization detection and aiming to solve the problem that fusing a film production alloy sample can erode a platinum crucible. The method comprises the steps of building up wall of the platinum crucible, preparing an oxidizing agent, pre-oxidizing an iron alloy sample and fusing and preparing sample from the iron alloy sample. The invention provides the fusing sample preparation method suitable for various iron alloys such as ferromanganese, silicomanganese, calcium silicon, ferrosilicon, ferromolybdenum, ferrotitanium, cymrite, ferrochrome, ferrocolumbium, ferrovanadium, silicon silicomanganese and the like. By adopting the method, a glass fusing piece can be manufactured without eroding the valuable platinum crucible, the sample can be completely oxidized in the sample preparation process, the sample preparation time is short, the prepared glass fusing piece is uniform and perfect, and the mineral effect and the granularity effect can be completely eliminated. The invention has safe and reliable method, simple and convenient operation and good repeatability, is suitable for various iron alloy samples and widens the application range of the fluorescence analysis.

The present invention discloses a construction method for a compound thrombus clearing preparation bioactivity chromatography finger print. The construction method comprises the following steps: (1) preparing a compound thrombus clearing preparation test solution, precisely sucking 10 mul of the compound thrombus clearing preparation test solution, and injecting into a double-pump dual-gradient high performance liquid chromatograph to obtain a compound thrombus clearing preparation HPLC finger print; (2) preparing a mixed reference substance solution, precisely sucking 10 mul of the reference substance solution, and injecting into the double-pump dual-gradient high performance liquid chromatograph to obtain a reference substance HPLC finger print; (3) adopting a reference substance control method, and adopting an RRLC / MS / MS technical method to prove 21 chemical components in the finger print; and (4) analyzing correlation between the 21 chemical components and bioactivity difference, clarifying bioactivity component groups, and establishing a compound thrombus clearing preparation bioactivity chromatography finger print. According to the present invention, the compound thrombus clearing preparation HPLC finger print and the bioactivity component groups obtained from chromatograph efficiency analysis are combined to construct the compound thrombus clearing preparation bioactivity chromatography finger print so as to completely monitor safeties, effectiveness and quality uniformities of raw material herbs, semi-finished products and finished products.

The invention relates to the inspection method and sampling device for the SO3 content of the smoke released by thermal power plant boiler. The sampling device comprises the dust remover, sampling tube, spiral collecting tube and drawing device, with the dust remover at the input end of the sampling tube whose output connected with the input of the spiral collection tube, with the input and output ends of the spiral collection tube on the spiral, and the output connected with the drawing device through hoses. It collects SO3 of the smoke to the spiral collection tube, getting SO42 sample solution after treatment, with arsenazo III as the color developing agent, dropping with barium acetate solution to get the density of SO3. It is accurate, quick, and reliable, with every possible means to avoid heat waste due to improving acid dew point corrosion.

The invention provides a method for analyzing autotransformer differential protection CT circuit connection. The method comprises the following steps of: (1) acquiring parameters of all windings in the autotransformer differential protection circuit; (2) measuring phases and amplitude values of phase currents of the windings in the autotransformer differential protection circuit; (3) calculating according to the acquired parameters to obtain the correct current phases of secondary circuits of the windings in the autotransformer differential protection circuit; (4) comparing to judge the correctness of the measured autotransformer differential protection circuit connection, and generating the corresponding connection status code; (5) outputting the result; and (6) synthesizing the primary windings and the secondary windings, and outputting the synthesis result. The invention has the advantages of high reliability, safe and simple use and convenient operation, and solves the technical problem of complex process for artificial judgment of connection correctness in the prior art.

The invention provides a method for evaluating damage accumulation inside a steel structure thick plate. The method comprises the following steps that firstly, an elastoplasticity damage constitutive model for the steel structure thick plate is built, and the increment form of the model stress component is obtained through derivation; secondly, a corresponding material subprogram is complied for the increment form; thirdly, layered sampling is carried out on the steel structure thick plate in the thickness direction, and the elastoplasticity parameter and damage parameter of each layer of materials are determined; fourthly, a finite element model of the steel structure thick plate is built, the complied material subprogram is introduced into finite element analysis, and different material attributes are given to parameters of materials on different layers; the finite element model is loaded, the damage evolution course of the steel structure thick plate under the effect of the external load is simulated, and therefore corresponding evaluation is carried out. As for the characteristic that the steel structure thick plate is large in thickness, the damage evolution course of the thick plate under the effect of the external load is considered from the perspective of layered material properties, and the evaluation result better conforms to the real damage accumulation of the steel structure thick plate.

The invention discloses a vibration stress numerical analysis method for turbomachinery blades. The method comprises the steps of 1, building an FEM model of a solid region of an entire circle of the blades and CFD models of periodically symmetric fluid regions; 2, obtaining steady-state pressure intensity field distribution of meshes of the fluid regions of the blades and instant pressure intensity field distribution of each time step in a pneumatic period; 3, converting pressure intensity field distribution data; 4, performing finite element mode analysis of the entire circle of the blades; 5, obtaining node force load vectors of blade surfaces of all time steps; 6, solving a vibration displacement response by a mode superposition method; 7, expanding a displacement response result into a stress result; and 8, performing vibration stress result extraction and check. According to the method, the pressure intensity distribution of the blade surfaces is obtained by adopting a non-steady computing method, and an accurate air exciting-vibration force load is obtained by interpolation from the meshes of the fluid regions of the blades to the pressure intensity of the meshes of the solid region, so that the computing precision is improved; and each sector adopts a CPU+GPU heterogeneous parallel computing mode, so that the computing speed is greatly increased.

The invention discloses a method and an apparatus for end point detection in titration analysis. The method mainly comprises detecting the wavelength of transmission light of a test solution, and then based on the complementary color principle, showing the color of the test solution in the form of a wavelength of a color the same with the color, thereby to determine the end point of the titration analysis. The device comprises a sealing case, a small door is arranged on the box for placing the test solution to the sealing case, a small hole of a suitable size is disposed on the small door so that it is convenient for a person to dropwise add a standard solution into the test solution by a dropping device through the small hole, a magnetic stirrer is arranged below the small door, the test solution is placed on the magnetic stirrer, a while-light-emitting device is arranged beside the test solution to provide while light beam, a light wavelength detection device for detecting the wavelength of transmitted light of the test solution is arranged at the light-transmitting side of the test solution, the light wavelength detection device is electrically connected with a control cabinet, and the display screen of the control cabinet is arranged on the sealing case. According to the method and the apparatus, human errors are minimized, measurement precision is high, costs are low, reproducibility is good, and popularization is easy.

The invention discloses a urine analysis method based on an intelligent terminal. The method comprises steps as follows: S1) urine information entry: a urine sample is dropped onto a urine analysis test strip or the urine analysis test strip is soaked into the urine sample, and a standard color bar and the urine analysis test strip are shot in the same picture; S2) image analysis: positions of the test strip and the standard color bar in the picture are analyzed, and an image of the picture is divided; S3) color block extraction: secondary image division is performed on the standard color bar and the urine analysis test strip; S4) calculation of the urine color: white parts between color blocks of the standard color bar are taken as standard white, colors of parts between color blocks of the urine analysis test strip is calculated through comparison, and the color of urine is restored; S5) calculation of colors of the color blocks: the color blocks of the standard color bar are taken as standard colors, and true colors of the color blocks are reduced; S6) result analysis: according to the true colors, obtained through calculation, of the color blocks, a urine analysis result is given and displayed on intelligent terminal equipment.

The invention relates to a detection method of citrinin, in particular to a method for detecting contents of citrinin in monascus by liquid chromatograph / mass spectrometer (LC / MS). The method comprises the steps of pre-processing a sample by an ultrasonic extraction method, and performing ultrahigh-pressure liquid chromatograph and mass spectrometric detection. In the method, a waters BEH C18 liquid chromatographic column is adopted, the mobile phase is acetonitrile and water, and the gradient elution condition is that the column temperature is the room temperature; a quadrupole mass spectrometer detector is used: a spray source is electrosprayed in a positive ion manner, and parent ions and product ions are used as qualitative and quantitative ions; the result is that the linearity of the standard solution of citrinin in the method between 0.01 and 50 microgram / L is good; the regression equation is y=1923.2x+270.29, R2 is 0.9998; the recovery of the sample is 83.6%; the detection limit is 0.001 microgram / L. The accuracy of the method is high, the repeatability is good, and the method is suitable for the quantitative detection of citrinin in monascus.

The metal in-situ statistical distribution analysis method, mainly relates to chemical components and its state analysis of metal amterial, which includes the following steps: exciting light-source system to implement precombustion-free continuous excitation of sample and synchronous scanning location, making excited spectrum become into linear spectrum, collecting and recording spectrum intensity of single spark discharge, statistically analyzing collected and stored spectral line intensities of linear spectrums, using computer to process said data so as to measure the parameters of chemicalcomponent, segregation, looseness and foreign impurity distribution of sample.