53 results about "Chromogenic" patented technology

The present invention relates to a humidity sensor, and more particularly, to a resistance film-type real-time chromogenic humidity sensor produced with a polyelectrolyte thin film. The humidity sensor according to the present invention is a chromogenic hygrometer in which a polyelectrolyte nano thin film that absorbs moisture is formed on a reflective layer, and the nano thin film varies terms of color and electrical resistance as moisture is absorbed and the thickness varies. The hygrometer according to the present invention is a dual-function hygrometer, the color and resistance of which vary. Provided is the chromogenic hygrometer in which the sensor made using a PSS-b-PMB thin film varies in color between purple, blue, green, yellow, orange, and red according to humidity at a very high response speed of within one minute.

The invention belongs to the technical field of circuit board detection, and particularly relates to a method for detecting, identifying and analyzing residues in a circuit board cavity, which comprises the following steps of: positioning suspected residual areas according to the gray difference of an X-ray image, generating a space coordinate set of the suspected residual areas, screening out a to-be-analyzed area set by combining chemical chromogenic reaction intensity and X-ray contour features, and analyzing the to-be-analyzed area set. The method comprises the following steps of: obtaining a plurality of regions, dividing the regions into a plurality of subsets according to spatial diffusion characteristics, obtaining element and functional group data of each region through energy spectrum and spectral analysis, analyzing candidate residue categories, and dynamically adjusting subset division based on the consistency of the candidate categories in the subsets until the consistency requirement is met. And finally, outputting a specific residue category for each region according to a division result. According to the method, dynamic subset division is carried out according to the space congruency and the contour features, systematic distinguishing and classification of diffusion type residues and attachment type residues are achieved, and the accuracy of category judgment is improved.

Systems and methods for imaging and, in some instances, analyzing biological samples such as biological tissue are described. The systems and methods may be directed to the interrogation of biological samples labeled with multiple markers (e.g., fluorophores and / or chromophores) corresponding to various biomarkers and / or cellular or subcellular structures within the sample. Some such systems and methods may combine certain optics (e.g., configurationally-fixed optics for fluorescence imaging and / or actuatable filters for chromogenic imaging) with multi-color sensors (e.g., RGB sensors) to facilitate the imaging and analysis of a sample. The systems and methods may also promote advantageous techniques for segmenting images of components of the biological sample. In some instances, the methods can assist users (e.g., pathologists) in scoring samples for indications such as diseases. The systems and methods may, in some instances, promote economical, accurate, and / or higher-throughput imaging and analysis of the sample.

The present invention discloses a preparation method and application of a sulfonylurea-structured thermosensitive color developer, relating to the technical field of color developers. The core of the thermosensitive color developer is a compound of formula 1 containing a sulfonylurea structure. The preparation method is achieved through three steps: esterification of raw materials to synthesize intermediate 1, borylation to obtain intermediate 2, and then synthesis of the target compound through the Suzuki reaction. Through the synergistic effect of the sulfonyl group and the urea group, the regulation of the hydrogen bond network and the optimization of the electron transfer efficiency are realized, solving the technical bottlenecks of the high-temperature activation requirement and insufficient color development stability of traditional thermosensitive color developers.

The invention discloses a method and a device for rapidly measuring the concentration of various inorganic anions in water. According to the method, rapid and high-precision colorimetric detection of eight ions such as fluorine ions, chloride ions, nitrite ions, bromide ions, nitrate ions, phosphate radicals, sulfite radicals and sulfate radicals is realized by adopting a reaction strategy of adding a color developing auxiliary agent and a specific color developing agent step by step and combining with step-by-step uniform mixing and optimizing a reagent combination, a concentration ratio and a reaction time sequence aiming at different target ions. The device comprises a sample groove, a multi-cavity color developing agent bin, a color developing auxiliary bin, a reaction tank, a liquid path conveying module, an image acquisition module and a control module which are integrated in a shell. Through deep integration of a chemical system and an automatic process, the problems of cross interference, poor color development stability, complicated operation and the like in multi-index detection of portable equipment are solved, and the method has the advantages of high detection speed, high accuracy, strong anti-interference performance, easiness in carrying and simplicity and convenience in operation.

A self-cleaning and base line stabilizing device of an automatic nutritive salt analyzer comprises a reaction assembly used for mixing a sample liquid sample, air and a corresponding reaction reagent to complete a chromogenic reaction; the light splitting detector is connected with the output end of the reaction assembly through a first connecting pipe; the cleaning assembly at least comprises a change-over valve, a second connecting pipe and a first peristaltic pump, the change-over valve is arranged on the first connecting pipe and located between the reaction assembly and the light splitting detector, one end of the second connecting pipe is connected with the change-over valve, the other end of the second connecting pipe can be connected with a reagent bottle filled with hydrochloric acid, and the second connecting pipe is sleeved with the first peristaltic pump. According to the method, pollution caused by adsorption of the flow cell can be actively prevented, the whole process only needs short time, baseline drift caused by adsorption of the chromogenic complex is prevented, the working efficiency is remarkably improved, and finally synchronous improvement of the determination efficiency and the data stability is achieved.

The utility model discloses a kind of liquid paper diaper, it is related to paper diaper technical field, including front waist piece, paper diaper body and rear waist piece set in sequence, the paper diaper body includes surface layer structure, absorption layer structure, chromogenic structure and bottom structure, the surface layer structure is provided with through-hole, the absorption layer structure includes first absorption layer and second absorption layer, the first absorption layer is arranged in the outside of surface layer structure, the second absorption layer is arranged in the outside of first absorption layer, first absorption layer and the connecting place of second absorption layer are provided with first flow guide groove, first flow guide groove is provided with first flow guide channel, the chromogenic structure is between second absorption layer and bottom structure. The liquid paper diaper of the utility model can improve water absorption speed and water absorption capacity, and show liquid volume.

The present invention provides a reversible thermochromic composition which exhibits black color upon coloration and colorless color upon discoloration, and has excellent light resistance, by using a fluoran derivative having a specific structure as an electron-donating chromogenic organic compound, and a reversible thermochromic microcapsule pigment containing the reversible thermochromic composition. The means for solving the problem is a reversible thermochromic composition comprising: (a) a fluoran derivative having a specific structure as an electron-donating chromogenic organic compound, (b) a compound having a specific structure as an electron-accepting compound, and (c) a reaction medium which allows the electron transfer reaction between the (a) component and the (b) component to occur reversibly in a specific temperature range, and a reversible thermochromic microcapsule pigment containing the reversible thermochromic composition.

The present invention relates to a two-color thermosensitive erasable paper based on the design of chromogenic agent matching and a preparation method thereof, and relates to the technical field of printing consumables. The two-color erasable thermosensitive paper includes a thermosensitive coating, and the thermosensitive coating includes a red thermosensitive coating and a black thermosensitive coating arranged in sequence from top to bottom. The chromogenic temperature difference between the red thermosensitive coating and the black thermosensitive coating is greater than 30 °C; the components of the red thermosensitive coating include a low-temperature chromogenic agent and an erasing aid I; the components of the black thermosensitive coating include a high-temperature chromogenic agent and an erasing aid II. Through the structural matching design of the low-temperature chromogenic agent in the red thermosensitive coating and the high-temperature chromogenic agent in the black thermosensitive coating, the chromogenic temperature difference between different thermosensitive coatings is realized to achieve color overlay; combined with the erasing aid, its efficient erasing is realized.

The utility model provides a shading box for chromogenic reaction, which relates to the technical field of shading boxes for chromogenic reaction, and comprises a shading mechanism, the shading mechanism comprises a bottom plate, a box body is arranged at the top of the bottom plate, a top cover is arranged at the top of the box body, a black jacket layer is fixedly connected in one box body, and the black jacket layer is fixedly connected in the other box body. Wherein the bottom of one top cover is fixedly connected with a black cushion layer, and the interior of the other box body is fixedly connected with a white sleeve layer. According to the titration device, the shading mechanism is arranged, so that a detector is not influenced by external light rays during titration chromogenic reaction observation and comparison, a detection result can be more accurate, and meanwhile, the two box bodies and the two top covers are arranged, so that the titration device is more convenient to use. Therefore, the two box bodies and the top cover are fixedly connected with a black sleeve layer, a black cushion layer, a white sleeve layer and a white cushion layer respectively, so that the two box bodies can provide two different detection environments.

The application discloses a chromogenic test paper for detecting aflatoxin and a preparation method thereof. The method adds montmorillonite to Fe(OH)3 colloid and mixes, and drops the mixture on a nitrocellulose membrane and waits for it to dry. The mixed solution of the Fe(OH)3 colloid and the montmorillonite in the application has an adsorption effect on the aflatoxin, forms a color block under the particle agglomeration effect, and realizes visual detection of the aflatoxin.

The application relates to the technical field of cosmetic detection, and particularly discloses a test paper card for detecting boric acid and / or borate in cosmetics and a detection method. The test paper card for detecting boric acid and / or borate in cosmetics comprises an activated sample pad, a functional reaction film and a PVC bottom plate which are sequentially attached, the activated sample pad is a glass fiber membrane soaked by a pretreatment reagent, the functional reaction film is a nitrocellulose membrane coated by a chromogenic reagent, the functional reaction film comprises an attaching area and a chromogenic area, the activated sample pad is located in the attaching area, and the chromogenic area is exposed to the environment. The application can be used for detecting whether boric acid and / or borate is contained in cosmetics, and can improve the sensitivity and stability of the detection of boric acid and / or borate in cosmetics.

The present invention relates to disinfection technology, and particularly to a quality control technology for o-phthalaldehyde disinfectant solution. A rapid detection indicator card impregnation composition for o-phthalaldehyde disinfectant solution, which comprises the following in mass percentages: stabilizer: 1% - 10%; chelating agent: 5% - 20%; neutralizing agent: 0.1% - 2%; chromogenic agent: 0.1% - 20%; chromogenic accelerator: 1% - 4%; the balance is pure water. After impregnating filter paper with the composition and drying it, it is pasted on white plastic paper with double-sided tape and compacted to form the rapid detection indicator card. The indicator card of the present invention has more stable, obvious and clear color development, rapid detection and more reliable results.

The utility model relates to the technical field of pressure-sensitive paper finished product packaging, and discloses a pressure-sensitive paper packaging finished product, the pressure-sensitive paper comprises a color developing layer and a microcapsule layer which are the same in shape and size, the color developing layer and the microcapsule layer are stacked, one side edge of the color developing layer and one side edge of the microcapsule layer are a connecting edge and are connected together through a splicing piece, an isolating layer is clamped between the color developing layer and the microcapsule layer, and the color developing layer and the microcapsule layer are connected through the splicing piece. The isolating layer prevents the color developing layer from being in direct contact with the microcapsule layer, and the size of the isolating layer is not smaller than that of the color developing layer and the microcapsule layer. According to the utility model, the isolating layer is clamped in the middle of the pressure sensing paper, so that when the pressure sensing paper is used, the isolating layer is pulled out, and the color developing layer and the microcapsule layer are attached for use.

The invention relates to the technical field of chemical analysis, and discloses a water quality ammonia nitrogen rapid detection system and method based on an intelligent terminal and machine learning, and the method comprises the following steps: mixing a to-be-detected water sample with a Nessler reagent to carry out a chromogenic reaction to obtain a chromogenic to-be-detected sample; performing flash lamp differential image acquisition on the to-be-tested color developing sample by using image acquisition equipment of an intelligent terminal to obtain an ambient light image and a flash lamp image; extracting color features from the same region of interest of the ambient light image and the flash lamp image, and constructing a combined feature vector; and inputting the combined feature vector into a pre-trained machine learning model to obtain one or more ammonia nitrogen detection results of the to-be-detected chromogenic sample. According to the invention, the interference of ambient light and equipment difference is effectively overcome by utilizing a flash lamp differential acquisition technology and a machine learning algorithm, expensive instruments or light boxes are not needed, and low-cost and high-precision portable ammonia nitrogen detection is realized.

The invention discloses a method for quickly testing chemical oxygen demand, which comprises the following steps of: 1, preparing a test solution which comprises the following components: A, a potassium dichromate solution (c is equal to 0.0250 mol / L); b, a mercury sulfate solution (100g / L); c, a silver sulfate-sulfuric acid solution (10g / L); 2, preparing a standard water sample; step 3, preparing a comparison reference sample, sequentially adding the standard water sample, the reagent B and the reagent A into the colorimetric tube, uniformly shaking, adding the reagent C into the colorimetric tube by using a pipette, uniformly shaking, and standing until the reaction is finished; 4, developing the water sample to be detected, sequentially adding the water sample to be detected, the reagent B and the reagent A into the colorimetric tube, uniformly shaking, adding the reagent C into the colorimetric tube by using the pipette, uniformly shaking, and standing until the reaction is finished; and 5, carrying out color comparison on the to-be-detected water sample obtained in the step 4 and a comparison reference sample.

The invention relates to the technical field of biological detection reagents, in particular to a preparation process of an anti-interference urine trace protein and urine creatinine double-chromogenic detection reagent, which comprises the following steps: dissolving a composite buffer agent in deionized water at 20-38 DEG C, stirring and dissolving, and adjusting the pH value of the system to 7.0-7.3; adding a composite anti-interference agent, an EDTA-2Na masking agent and enzymes in sequence, continuously stirring, and controlling the temperature of the system not to exceed 38 DEG C; independently preparing an improved BCA color developing agent and a copper sulfate auxiliary color developing agent, mixing and standing; adding the color developing system into the buffer solution system, adding a compound stabilizer, stirring and standing; by adopting a multi-enzyme synergistic composite anti-interference system and combining the synergistic effect of the masking agent, the influence of various interfering substances in urine can be effectively shielded, and non-specific reaction between the interfering substances and a detection system is avoided.

The utility model relates to the technical field of water quality detection, in particular to a maintenance-free online DPD residual chlorine analyzer which comprises two groups of detection inlets arranged at the bottom of a measuring chamber, the two groups of detection inlets respectively supply reagents and water samples to the measuring chamber, a first input cabin is arranged at the input end of a water sample pump to respectively supply the water samples or cleaning fluid to the water sample pump, and a second input cabin is arranged at the input end of the water sample pump. The silicon photocell is arranged on one side of the measuring chamber, two groups of detection inlets are formed in the bottom of the measuring chamber, and the two groups of detection inlets can be respectively connected with a reagent pump and a water sample pump so as to supply a reagent and a water sample into the measuring chamber, so that residual chlorine detection of the water sample is met; the cleaning cabin can be matched with the water sample pump to clean the measuring chamber after measurement, so that components after color development of a detection sample are remained in the measuring chamber, and the intensity of light penetrating through the measuring chamber can be detected through the silicon photocell beside the measuring chamber.

The present disclosure provides for porous polymer materials that include an ordered array of voids separated by a polymer framework. The porous polymer material can have a recovery state where the voids are in an uncollapsed state and iridescent color, and a deformed state having voids in a collapsed state that is non-iridescent or substantially transparent. The materials can have regions of both states simultaneously. Also described are methods for fabricating a polymer material as above, as well as chromogenic sensors including the polymer material. The sensors can have hidden anti-counterfeiting patterns, hydrophobic / oleophobic properties, and chromogenic transformation can be triggered by various stimuli such as solid target compounds, light energy, and more.

Provided herein are methods for fabricating a porous polymer material, methods for revealing hidden anti-counterfeiting patterns, chromogenic sensors having hidden anti-counterfeiting patterns, and the like. Chromogenic sensors including porous polymer materials are provided. The chromogenic sensors can reveal hidden patterns such as anti-counterfeiting patterns and the pattern can be re-hidden.

The invention discloses heavy metal developing test paper based on a carbon quantum dot composite material as well as a preparation method and application thereof, and belongs to the technical field of heavy metal detection. The heavy metal chromogenic test paper comprises a quantitative filter paper substrate, a composite indicator and a colloid protection layer, wherein the composite indicator is prepared from a silk fibroin-anthocyanin compound, fluorescent carbon-based quantum dots and rich-pore carbon nitride, and is loaded on the substrate through mesoporous silicon balls; and the colloid protection layer is a mixed colloid solution of a masking agent and a sensitizer. The preparation method comprises the following steps: independently preparing the components, constructing the composite indicator, loading the meso-porous silicon balls and coating the protective layer. According to the invention, on-site rapid semi-quantitative detection of cadmium ions and ferric ions in soil or water can be realized, the operation is simple and convenient, the cost is low, and on-site screening requirements are met.

This invention provides a water-color-changing material, a water-color-changing indicator, and a colorant that develop color upon contact with water, exhibiting a deep color when colored, showing good color development even with a small amount of water, and maintaining its color over time. [Solution] A water-color-changing material, a water-color-changing indicator, and a colorant comprising a porous material containing a water-color-changing composition comprising an electron-donating chromogenic organic compound, an electron-accepting compound, and an amide compound and / or an imidazolidinone compound. Furthermore, the amide compound may be an amide compound of a specific structure, and the imidazolidinone compound may be an imidazolidinone compound of a specific structure.

This invention belongs to the field of isotope analysis technology, specifically relating to environmental tracing and geochronological studies of the cosmogenic nuclide beryllium-10. It discloses an automated collection device and method for purifying the cosmogenic nuclide beryllium-10. The device constructs an automated chain of online reaction, real-time monitoring, and intelligent diversion, eliminating reliance on manual solution collection experience. The mixed reaction module precisely proportions the eluent, buffer solution, and chromogenic solution, creating a specific instantaneous chromogenic environment for beryllium ions. Combined with an optical detection module, it can capture color signals in real time and convert them into digital signals. The control module drives the fluid switching module at millisecond levels based on preset signal thresholds, accurately separating the target product from the waste liquid. This mechanism can accurately identify the start and end points of the elution peaks of the target element, solving the problem of beryllium-10 loss caused by complex sample matrices or resin aging. Through standardized photoelectric detection, it ensures high recovery rates and purity requirements for ultra-trace beryllium-10 analysis.

The utility model discloses a separation system for 1, 4-butanediol and 2-alkyl-1, 4-butanediol, and relates to a separation system for 1, 4-butanediol and 2-alkyl-1, 4-butanediol. The separation system is provided with the desalting tower and the film evaporator, color-producing impurities such as hydroxybutyraldehyde, acetal, 2-(4-hydroxybutoxy) tetrahydrofuran and the like in raw materials of 1, 4-butanediol and 2-alkyl-1, 4-butanediol are converted into components easy to separate, and the proportion of a target product to be separated is effectively increased. Further, the 1, 4-butanediol and the 2-alkyl-1, 4-butanediol are separated through a first separation tower and a second separation tower, and the 1, 4-butanediol and the 2-alkyl-1, 4-butanediol are obtained.

This invention discloses a chromogenic solution and kit for visual colorimetric detection of free ferrous protoporphyrin in cells. The chromogenic solution consists of reagents A, B, and C: Reagent A is prepared with deionized water and contains NaCl, Proclin 300, and glycerol; Reagent B is prepared with an acetate-sodium acetate buffer at pH 4.0 and contains glycerol, Triton X-100, β-cyclodextrin, disodium EDTA, citric acid, ethanol, and 3,3',5,5'-tetramethylbenzidine; Reagent C is prepared with an acetate-sodium acetate buffer at pH 4.0 and contains 2.0-4.0% hydrogen peroxide and 35.0-50.0% ethanol. The chromogenic solution of this invention has a lower background value and can detect the content of free ferrous protoporphyrin in cells within 10 minutes by visual colorimetry, with a detection limit as low as 10 nmol / L. The chromogenic stability is maintained for 12 hours, making it suitable for rapid assessment of cellular pathological conditions.

The invention discloses a boiler denitration flue gas ammonia escape detection system and detection method, and belongs to the technical field of ammonia escape detection, the boiler denitration flue gas ammonia escape detection system comprises a flue gas sampling and pretreatment unit, a reaction and color development unit, an image acquisition unit, and a processing and control unit; the reaction and color development unit comprises a reaction tank A, a reaction tank B, a color developing agent storage unit, a double-channel injection pump and a color development reaction adjusting unit; a color developing agent is stored in the color developing agent storage unit; the image acquisition unit comprises two high-speed industrial cameras which are used for respectively and synchronously acquiring reaction images of the reaction tank A and the reaction tank B under equal shooting conditions; the processing and control unit is used for analyzing and processing reaction images of the reaction tank A and the reaction tank B, eliminating apparent interference of particulate matters reacted in the reaction tank B and chemical inhibition interference of chromogenic reaction, and obtaining a final ammonia escape index If which is evaluated to approach to the real ammonia escape concentration in the flue gas. The method is faster and more accurate in judging whether ammonia escape exists or not and whether the ammonia escape exceeds the national specified standard or not.

Provided herein are methods for fabricating a porous polymer material, methods for revealing hidden anti-counterfeiting patterns, chromogenic sensors having hidden anti-counterfeiting patterns, and the like. Chromogenic sensors including porous polymer materials are provided. The chromogenic sensors can reveal hidden patterns such as anti-counterfeiting patterns and the pattern can be re-hidden.

The present invention relates to a method for detecting nitrite, belonging to the technical field of detection and analysis. The method is that under acidic conditions, 3,3'-dimethoxy-5,5'-dimethylbenzidine reacts with nitrite to change the color of the solution. Qualitative analysis can be carried out by the naked eye, or semi-quantitative analysis can be performed by comparing the reaction solution with a nitrite concentration colorimetric card, or quantitative analysis can be carried out by measuring the maximum absorbance of the reaction solution with a spectrophotometer. The chromogenic molecule used in the method of the present invention is 3,3'-dimethoxy-5,5'-dimethylbenzidine molecule, which is a TMB derivative, reducing the potential toxicity and carcinogenic and mutagenic risks during the detection process. At the same time, it has high specificity and sensitivity to nitrite, and the color development is stable, capable of meeting the detection requirements of a wide range of samples. In addition, the method of the present invention is simple to operate, and the reagents used are safe, easy to transport and store, and are suitable for home detection of food in daily life.

The invention discloses a high-sensitivity controllable mechanical discoloration colloidal crystal hydrogel material and a preparation method thereof, and particularly relates to the field of colloidal crystal materials, the high-sensitivity controllable mechanical discoloration colloidal crystal hydrogel material comprises an elastic hydrogel base layer and a layer number controllable colloidal crystal film; the hydrogel base layer has stretchable and compressible properties, and the colloidal crystal film is formed by periodically arranging monodisperse colloidal particles and can generate Bragg diffraction with electromagnetic waves so as to generate structural colors. When the hydrogel base layer is subjected to stretching or compression stimulation, the volume of the hydrogel base layer is deformed, so that the distance between the colloidal crystals is changed, a reflection peak is displaced, and high-sensitivity detection of strain is realized. The prepared mechanical color-changing sensor has the characteristics of high sensitivity and high stability, and can be used in the fields of strain sensors, health monitoring, anti-counterfeiting materials and the like.

The utility model discloses a special thin-layer chromatography developing box for a laboratory, which comprises a developing box, a control panel is arranged at the upper end of the outer surface of the front end of the developing box, a thin-layer plate is arranged in the developing box, and a placing mechanism is arranged at the lower end of the thin-layer plate. The placing mechanism comprises a bracket, an antiskid plate, an exhaust fan, a fixing frame, a first limiting groove, a T-shaped pulling plate, a frame body, a filtering plate, a deodorizing plate, a side plate, a rubber pad, a clamping groove, a clamping plate, a limiting block, a second limiting groove, a spring and a hole groove; and the exhaust fan is located in the middle of the outer surface of the upper end of the color developing box. According to the special thin-layer chromatography developing box for the laboratory disclosed by the utility model, the anti-skid plate can be used for increasing friction, reducing the influence of sliding and falling of the thin-layer plate on placement, conveniently removing a reagent smell and reducing the environmental pollution caused by peculiar smell, acid-resisting, alkali-resisting and corrosion-resisting treatment is carried out on the inner wall of the developing box, the developing box is convenient to clean, and the frame body is convenient to mount, dismount and replace; and a better use prospect is brought.