8results about How to "Accurate quantitative detection" patented technology

The application discloses Au@PATP@Ag NRs nanomaterial and a preparation method and application thereof. The application also discloses a method for qualitatively and quantitatively detecting nicotine concentration based on surface enhanced Raman scattering technology and application thereof. The Au@PATP@Ag NRs nanoparticles are used as active base materials of SERS, and a target object is analyzed and detected by using a Raman spectrometer. According to a linear relation equation of a ratio of SERS signal intensity of different concentrations of nicotine solution to characteristic peaks of nicotine and an internal standard substance, the content of nicotine in a solution to be detected can be obtained, and the detection sensitivity of nicotine is greatly improved. The internal standard molecule is introduced into the core-shell structure, and the accuracy of quantitative detection of nicotine is improved. The application also has great application in sensitive detection of nicotine in cigarettes and environmental cigarette smoke. In addition, the application also has the advantages of simple principle, rapidness, simple pretreatment, high selectivity, high detection sensitivity and the like.

A device and method for detecting the pull-out force of planetary gear shafts in automatic transmissions belong to the technical field of automotive automatic transmissions. The device includes a base, a gantry bracket, replaceable testing support fixtures, a pressure detector, a testing platform, a pressure sensor, a hydraulic cylinder, replaceable pressure heads, guide columns, and a hydraulic mechanism. All components are rigidly connected. The fixtures and pressure heads are interchangeable to accommodate different specifications of planetary gears. The hydraulic mechanism supplies pressure to the hydraulic cylinders, and the pressure sensor collects force values. The testing method includes four steps: fixture adjustment, placement and positioning, pull-out detection, result judgment, and completion. Hydraulic force is applied to press the shaft, the sensor collects data, and the detector performs judgment, storage, and data export. This invention, through multi-system collaborative design, achieves accurate and quantitative detection of the pull-out force at the riveting joint of the planetary gear shaft. It combines versatility, convenience, and data traceability, effectively solving many shortcomings of existing testing methods and providing reliable assurance for riveting quality control.

This invention belongs to the field of fetoglobulin B detection technology, and discloses an immunochromatographic test strip for quantitative detection of fetoglobulin B using quantum dot fluorescent microspheres and its preparation method. The immunochromatographic test strip of this invention includes a sample pad, a release pad, and a nitrocellulose membrane; the release pad is coated with a fetoglobulin B monoclonal antibody labeled with quantum dot fluorescent microspheres and a mouse IgG antibody labeled with quantum dot fluorescent microspheres; the nitrocellulose membrane has a detection line and a control line, the detection line is coated with fetoglobulin B monoclonal antibody, and the control line is coated with goat anti-mouse IgG antibody. The immunochromatographic test strip of this invention reduces the detection time to 9-12 minutes, and the total detection time is only 20 minutes, achieving rapid and accurate quantitative detection of fetoglobulin B. It also features high detection sensitivity, a wide detection range, and simple and rapid operation, which is beneficial for the screening and monitoring of atherosclerotic coronary heart disease.

This invention discloses a verification sample and verification method for halftone mask HTM repair process, relating to the field of flat panel display mask manufacturing technology. The verification sample includes a substrate, on which are integrated dimensional accuracy testing structures, edge straightness testing structures, seam straightness testing structures, and ZAP repair straightness testing structures. The ZAP repair straightness testing structure comprises two opposing HTM patterns, forming an overlapping area. After being removed by ZAP laser scanning, a third seam is formed for evaluating the repair effect. The halftone layer of the verification sample has a light transmittance of 35%-45%. The verification method includes five steps: dimensional accuracy verification, edge straightness verification, seam straightness verification, ZAP repair effect verification, and transmittance consistency verification. This invention, through the integrated design of four types of testing structures, achieves systematic quantitative verification of the dimensional accuracy, multi-directional straightness, ZAP repair straightness, and optical transmittance of the HTM repair process.

This invention belongs to the field of chloride detection technology, specifically relating to a perovskite-based nanomaterial, its preparation method, and its application. The perovskite-based nanomaterial includes upconversion nanomaterials and Ag₂S quantum dots, with the upconversion nanomaterials and Ag₂S quantum dots linked by chemical bonds. The upconversion nanomaterials have a core-shell structure, with Yb 3+ / Er 3+ The perovskite-based nanomaterials form the core, which is then coated with a Cs₂NaYF₆ shell. The perovskite-based nanomaterials are added to the sample, and the emission intensity of the sample is measured in the 300–750 nm range under 980 nm laser excitation. The chloride concentration is calculated based on a standard curve. The perovskite-based nanomaterials prepared in this invention exhibit high detection accuracy in chloride detection, enabling quantitative detection of chloride at the micromolar level. Furthermore, the preparation method is simple and inexpensive.

This invention discloses a method for synthesizing a standard sample for detecting tartrazine intermediates as shown in structural formula 1, characterized by the following reaction formula 1. This patent provides a method for preparing a standard sample for detecting the content of tartrazine intermediates, the structure of which is shown in structural formula 1, enabling rapid and accurate quantitative detection of 1-(4'-sulfonylphenyl)-3-carboxylic acid methyl ester-5-pyrazolone monosodium salt in tartrazine.

The invention provides a method for detecting p-aminophenol in compound paracetamol and chlorpheniramine maleate granules and application, and belongs to the technical field of chemical drug analysis methods. The invention discloses a method for detecting p-aminophenol in compound paracetamol and chlorpheniramine maleate granules, which is high performance liquid chromatography, and the high performance liquid chromatography conditions are as follows: a chromatographic column is an octadecyl silane bonded silica gel chromatographic column; the detection wavelength is 255 to 259 nm; the flow velocity is 0.9 to 1.1 ml / min; the column temperature is 28-32 DEG C; a 0.025 mol / L disodium hydrogen phosphate solution (the pH is adjusted to 6.6 by phosphoric acid) is used as a mobile phase A, methanol is used as a mobile phase B, and gradient elution is performed for separation; the solvent is a 15% methanol water (containing 0.1 mg / ml ascorbic acid) solution. According to the analysis method, p-aminophenol in the compound paracetamol and chlorpheniramine maleate granules can be accurately and quantitatively detected, the separation degree of a p-aminophenol peak and an adjacent impurity peak meets the requirement, and the method is high in specificity, good in durability and high in sensitivity.

The present application provides a kind of self-insulation concrete wall real stone paint flatness image detection method and system, specifically, composite structured light pattern is projected to the wall surface to be measured, the pattern is logarithmic frequency modulation sinusoidal stripe as high-resolution phase carrier, Gray code of two-dimensional absolute position information is superimposed and encoded in chroma channel, deformed pattern image is synchronously collected, frequency response confidence map is generated based on the image, global energy function containing confidence weight and smoothing constraint is constructed, high-precision absolute phase map is obtained by solving, and is converted into initial three-dimensional point cloud, high-fidelity three-dimensional point cloud is obtained by weighted nonlinear optimization, the three-dimensional point cloud is converted into depth height map, is decomposed to the scale corresponding to the detection standard by the two-dimensional discrete wavelet transform associated with physical scale, the L1 norm of key scale wavelet detail component is calculated, macro fluctuation and surface texture energy coefficient are separated, and the quantitative representation of wall surface macro flatness deviation is realized.