56results about How to "Detection interference is small" patented technology

The invention discloses a mercury ion detection method which is characterized by comprising the following steps: (1) mixing a standard mercury ion solution and a gold nanocluster solution, and establishing a standard curve for detecting the fluorescence signal quenching of nanocluster and the mercury ion quantity; and (2) mixing a sample solution with the gold nanocluster solution, substituting the quenching intensity of the fluorescence signal of the nanocluster into the standard curve, thereby obtaining the content of the mercury ion in the sample. The method has the advantages that the sensitivity is high, the interference of other ions on detection of the mercury ion is slight, and selective detection of the mercury ion can be realized, so that the aim of rapidly detecting the mercury ion concentration is achieved. The method has wide application prospects in mercury ion detection.

The invention discloses an ESPR-based heavy metal analyzer, which comprises a chemical reaction part, a surface plasma resonance spectrometer and an information processing system, wherein the chemical reaction part includes a detection cell, a counter electrode, a reference electrode, an array electrode and an electrochemical workstation; the array electrode is positioned at the bottom of the detection cell, the counter electrode and the reference electrode are inserted in the detection cell, the counter electrode, the reference electrode and the array electrode are respectively connected to the electrochemical workstation; the electrochemical workstation and the surface plasma resonance spectrometer are respectively connected to the information processing system. The invention further discloses an analysis method of the ESPR-based heavy metal analyzer, which achieves the simultaneous detection of multi-objective heavy metals, enhances the detection sensitivity and spatial resolution, and reduces damages on thin metallic membrane plate (the array electrode and active points thereof).

The invention provides a docking ship detection method based on edge line analysis and aggregation channel characteristics. The method comprises the following steps: firstly, realizing sea-land segmentation based on multi-scale multi-structure element morphological filtering, defining an edge point gradient tangent angle and port convexity characteristics by combining rectangular shape characteristics of a port in a remote sensing image to position the port, and obtaining a port region-of-interest set; and then, extracting aggregation channel characteristics of the ship target, constructing aship sample training library based on the aggregation channel characteristics, finishing training of a classifier by utilizing an AdaBoost algorithm, and finishing final judgment and confirmation of the ship target by utilizing the trained classifier. According to the invention, the port can be quickly positioned from the large-scale remote sensing image; port positioning does not need to acquiregeographic prior information and perform a large amount of feature matching calculation, ship features are fully reflected by utilizing aggregation channel features, the problem of serious interference of the backgrounds of ports on ship detection is solved, various types of ships can be detected, and the application range is wide.

This invention discloses one filter property online test method and device, which comprises the following steps: using one probe under test area and pressure to test filter transparent degree and liquid content; transparent degree test is through filter liquid flow and pressure; liquid content is to use liquid device for test through controller to convert device signal into liquid content. The test device comprises probe, spray head, liquid device with probe, pressure sensor, flow sensor, pressure adjust valve, pressure tar, controller and power, wherein, the spray head and liquid detect probe are fixed onto probe; the spray head is connected with pressure sensor and flow sensor through pressure adjust valve and pressure tar.

The invention discloses a detection method for selectively recognizing the Fe3+ capacity. The method comprises the following steps of respectively preparing a standard solution of acetonitrile with the concentration of 2*10<-5>mol / L of Ag+, Ca2+, Cd2+, Co2+, Cr3+, Cu2+, Fe3+, Hg+, Hg2+, K+, Mg2+, Mn2+, Na+, Ni2+, Pb2+ and Zn2+, and arranging 1ml of the standard solution into a cuvette; adding a probe solution into each cuvette, standing the cuvette, wherein the cuvette with Fe3+ is rapidly changed to be colorless. By adopting the method, not only can the F3+ be recognized in an organic solvent, but also the Fe3+ can be sensitively recognized in the buffering aqueous solution, the CN- with high toxicity can be recognized on the basis, and the fluorescent probe after being processed by utilizing the method can be primarily used for fluorescently recognizing Fe3+ in a cell body.

The invention relates to a surface molecular imprinting SERS (Surface Enhanced Raman Scattering) sensor based on core-shell structure polydopamine coated gold nanoparticles as well as preparation andapplication of the surface molecular imprinting SERS sensor. A preparation method comprises the following steps: by taking dopamine as a functional monomer and a phthalate substance as a template molecule, carrying out self-polymerization on the surfaces of gold nanoparticles to obtain a molecularly imprinted polymer, eluting the molecularly imprinted polymer, and dropwise coating the surface of ascreen-printed electrode with the molecularly imprinted polymer to obtain the surface molecularly imprinted SERS sensor. Compared with the prior art, the invention is combined with a Raman spectrometer, by combining electrochemical enrichment and molecular imprinting technologies, high-selectivity and high-sensitivity detection of phthalate substances in a water body in a complex environment canbe realized at the same time, and the sensor has the advantages of simple preparation process, high detection speed, no need of sample pretreatment, environmental friendliness, low cost and the like,and shows a wide application prospect.

The invention discloses a method for quantitatively detecting a free amino acid in a clinical sample, and belongs to the field of analysis and detection. According to the method, an acidic methanol solution is used for extracting the free amino acid in the clinical sample, then the property of the amino acid is changed through alcohol derived carboxyl, and deuteration agent derived amino acid serves as an internal standard instead of deuteration amino acid to be favorable for chromatographic separation and quantitative mass spectrometric detection. The operation of the method is simple, the amino is basically separated within a short period of time, the interference of a matrix is greatly reduced, the cost is low, the specificity is good, and the method is suitable for quantitative detection of the free amino acid in the clinical sample.

The invention discloses a wafer caching device and a chemical mechanical polishing system. The wafer caching device comprises a support frame and a detection assembly, the support frame is used for horizontally supporting a wafer, and the detection assembly is arranged at the peripheral side of the support frame; the detection assembly comprises a signal receiving and transmitting part and a reflection part arranged in a matched mode, an optical signal output by the signal receiving and transmitting part is emitted towards the reflection part, and the reflection part reflects the optical signal to the signal receiving and transmitting part; and the detection assembly judges whether the wafer is placed on the support frame or not according to the optical signal received by the signal receiving and transmitting part.

The invention discloses a free fatty acid detection kit and a preparation method thereof. The kit comprises reagents A and B, wherein the reagent A is prepared from the following components: sodium dihydrogen phosphate, a coenzyme A, triphosadenine, acyl coenzyme A synthetase, MgCl2, Trinder substrate and a proper amount of magnetized water, and the pH value is regulated to 7.2. The reagent B is prepared from the following components: sodium dihydrogen phosphate, 4-aminoantipyrine, acyl coenzyme A oxidase, peroxidase, flavin adenine dinucleotide, EDTA-2Na, N-sodium cocoanutylglutamate, sodiumlauryl ether sulphate, sodium N-acyl-L-serine, mannitol, sodium citrate and a proper amount of magnetized water, and the pH value is regulated to 7.2. The kit has the advantages of high and stable enzymatic activity and long preservation life; after the kit is preserved for about 15 days at 35-37 DEG C, the deviation of the detection result is only 1.99%; and the sensitivity is improved by 3.45%.

The invention discloses a traffic sign detection method based on an adaptive threshold. The present invention first adopts the red and blue method to preprocess the image to obtain the red and blue gray scale image, and then performs multiple threshold value processing on the gray scale image. In each thresholding process, contour detection is performed on the binary image generated by the thresholding process; then, according to the shape characteristics of the traffic sign, geometric constraints and sign contour matching of Hu invariant moments are performed, and the current threshold image is obtained by filtering and screening. The set of suspected traffic sign areas; finally, the multiple thresholding results are combined, and the final traffic sign ROI is determined according to the frequency of detection of the outline area of ​​the sign. The present invention enables the traffic sign candidate area in the image to obtain a better threshold processing effect, has the characteristics of threshold self-adaptation, not only has high detection efficiency and time performance, but also well solves the adaptability problem under different lighting conditions .

The invention discloses a graphene-modified lactic acid biosensor, comprising: a substrate, a reference electrode, a counter electrode and a working electrode arranged in parallel on the substrate, and coated on the reference electrode, the counter electrode and the working electrode An insulating layer on part of the surface, the insulating layer and the exposed part of the reference electrode, the counter electrode and the working electrode surround a reaction chamber, and the working electrode includes a carbon paste wire, a graphene layer and an enzyme solution layer, The graphene layer is covered on the reaction area of ​​the carbon paste wire; the enzyme liquid layer is located in the reaction chamber and combined with the graphene layer, and the enzyme liquid layer contains lactate oxidase and enzyme activity additives. The lactic acid biosensor is a miniaturized lactic acid sensor that does not rely on electron transfer agents, has low cost, high sensitivity, and good anti-interference performance, and can quickly and accurately measure the lactic acid content in human serum.

The invention discloses an online detection method and device for filter cloth performance. The detection method uses a probe to simultaneously detect the liquid permeability and liquid content of the filter cloth under a certain detection area and pressure. The liquid permeability is to measure the flow and pressure of the liquid passing through the filter cloth; the liquid content is detected by a liquid meter, and the electrical signal detected by the liquid meter is converted into liquid content by the controller. The detection device mainly includes a probe, a nozzle, a liquid meter with a liquid detection head, a pressure sensor, a flow sensor, a pressure regulating valve, a pressure tank, a controller and a power supply. The nozzle and the liquid detection head are installed in the probe, and the nozzle is connected to the pressure sensor. After the flow sensor is connected to the pressure tank through the pressure regulating valve, the liquid detection head is connected to the liquid meter. The invention overcomes the defects of the prior art, has the advantages of convenient detection, stable performance and high precision; simultaneously quantitatively detects the liquid permeability and liquid content, and has the advantages of strong pertinence, practicability and guidance.

The invention discloses an optical inspection apparatus and an optical inspection method. The optical inspection apparatus comprises a first detection device, a second detection device, and a sensing device. The first detection device is composed of a first display device and a first control device. The first control device is connected with the first display device. The first control device is used for controlling the state of the first display device. The second detection device is composed of a second display device and a second control device. The second control device is connected with the second display device. The second control device is used for controlling the state of the second display device. The first display device and the second display device are oppositely arranged. The sensing device is used for sensing the movement of a target position and sending signals to the first control device and the second control device. The sensing device is arranged between the first detection device and the second detection device. According to the optical inspection apparatus, the number of configured people can be reduced, and a large amount of mobile consumption is avoided. Meanwhile, the automatic switching among light sources is realized, and the detection interference is reduced.

The invention discloses a quinoline chenodeoxycholic acid sensor, the molecular formula is C 36 h 49 NO 6 . The invention also discloses a quinoline chenodeoxycholic acid sensor as a Hg 2+ detection application. The quinolinated chenodeoxycholic acid sensor constructed by the invention detects Hg2+, which not only has high sensitivity and good selectivity, but also has less interference with the detection of mercury ions by other metal ions. Experimental results show that the fluorescent sensor provided by the invention is only sensitive to Hg 2+ Responsive, good selectivity. For different concentrations of Hg 2+ When testing, it shows a good linear relationship, and the linear response range is 3.0×10 ‑6 ~1.0×10 ‑ 5 mol / L, available for Hg 2+ quantitative detection. The lower limit of detection is 1.9×10 ‑7 mol / L, for Hg 2+ detection with high sensitivity. In addition, other metal ions have little interference on the detection of mercury ions, which solves the defects of poor selectivity and susceptibility to interference in existing mercury ion fluorescence sensors.

The invention provides a four-pin dual-working high-precision photoelectric transparent interdigital electrode containing an insulating protective film and application of the four-pin dual-working high-precision photoelectric transparent interdigital electrode in photoelectric joint detection.The four-pin dual-working high-precision photoelectric transparent interdigital electrode comprises an electrode substrate, an electrode area is arranged at one end of the front face of the electrode substrate, and a pin area is arranged at the other end of the front face of the electrode substrate; the electrode area comprises a first detection part (1), a second detection part (2), a third detection part (3) and a fourth detection part (4), the third detection part (3) is located on the right side of the first detection part (1), the second detection part (2) is located between the first detection part (1) and the third detection part (3), and one part of the fourth detection part (4) is located on the right side of the third detection part (3); the other part is located on the outer side of the first detection part (1) and the third detection part (3), the first detection part (1) and the third detection part (3) vertically extend to form a first interdigital strip and a second interdigital strip which are crossed and parallel, the first interdigital strip and the second interdigital strip are arranged in a staggered mode in a tooth comb shape, the first interdigital strip is arranged in a gap of the second interdigital strip, and the first interdigital strip and the second interdigital strip are arranged at the same interval. The electrode can be used for electrochemical detection of extremely small amounts of reagents.

The invention discloses an on-line full analysis and monitoring method of an acid rain monitoring system, comprising the following steps: Step A: Rainfall detection in a 35cc metering bottle, in this step, when the rainfall in the 35cc metering bottle reaches 35ml within 1 hour When the rain in the 35cc metering bottle is less than 35ml within 1 hour, the detection step; step B: the detection of the rainfall in the 260cc reserve sample buffer bottle, which is divided into a detection after a rain in this step steps, and the detection steps when the rainfall in a day is less than 35ml. The online full analysis and monitoring method of the acid rain monitoring system of the present invention can avoid the monitoring interference caused by the rainwater to be detected due to the corrosion or electrolysis of the positioning detection electrode in the acid rain water, reduce the monitoring interference caused by the residual liquid in the container and the pipeline, and make up for the The detection and analysis of acid rain is missing when the rainfall is insufficient.

The invention relates to an excitation-shielding quantitative detection probe and a corresponding method. The probe comprises a rectangle constant permanent magnet, an L-shaped shielding element and a magneto sensor. The L-shaped shielding element is attached to an S-pole part of a horizontal side-face and a non-working-face of the rectangle constant permanent magnet; the magneto sensor is arranged on a magnetic-field zero-intensity position of a mutual zone between the N-pole and S-pole on the non-working-face of the rectangle constant permanent magnet. The method includes the following steps: a magnetic field intensity initial value of a magnetometer is set; the working face of the probe is led to touch an outer wall of a detected austenitic steel pipe and to move along the length of the steel pipe; both a position on the steel pipe where the detected magnetic field intensity is the maximum and a position on the steel pipe where the detected magnetic field intensity is reduced to aninitial value from the maximum are recorded; the probe is moved along the circle of the steel pipe and a position on the steel pipe where the magnetic field intensity is reduced to the initial value is recorded. For the invention, the size of the probe is small so as to reduce the interference to the detection by the accumulated oxide film in the austenitic steel pipe. The invention can be widelyapplied to the detection to boilers of power plants.

The invention provides a method for preparing a fluorescent probe for iodide ion detection in water samples, which is characterized in that it comprises: step 1: after mixing phosphorus pentoxide solid, sodium hydroxide solid and N-methylpyrrolidone Ultrasound at room temperature, put the ultrasonic reaction solution in an oil bath, and prepare phosphorus oxide quantum dots by solvothermal method; the reaction solution is centrifuged to remove the precipitate, the supernatant is taken, and purified by dialysis, and the dialysate After concentration and freeze-drying, a blue-green fluorescent phosphorus oxide quantum dot solid material is obtained; step 2: dissolving the blue-green fluorescent phosphorus oxide quantum dot solid material in deionized water to obtain a phosphorus oxide quantum dot aqueous solution, and the phosphorus oxide quantum dot aqueous solution and Ag + Aqueous solutions are mixed to obtain Ag + The phosphorous oxide quantum dot probe mediated by the method is a fluorescent probe for the detection of iodide ions in water samples. The fluorescent probe obtained by the invention can quickly detect iodide ions, and the probe has better selectivity for iodide ions in different water samples.