Class / Patent application number | Description | Number of patent applications / Date published |
436110000 | Nitrite or nitrate | 25 |
20080318333 | Method and System for Measurement of Nitrite and Nitric Oxide Release - A method for combined measurement of release of nitrite (NO | 12-25-2008 |
20090246881 | Detection of Explosives Using Luminescence - A system and method for detecting trace explosives is provided that utilizes a lumnescent reagent, such as blue-fluorescent biphenyl compound, to simultaneously detect multiple nitrogen-based explosives on a sample substrate. The test reagent is mixed with a solvent to improve mixing and maximize the dissolution of the reagent and any trace explosives present on the substrate. A thin film of reagent is applied to the substrate either before or after the substrate contacts a sample area to be tested. Heated air is then applied to the substrate to improve the sample reading. A light source is utilized to illuminate the reagent and expose any quenched portions of the substrate that indicate the presence of an explosive. Quenched portions may be detected visually, or utilizing an analyzing apparatus, such as a fluorimeter or camera. A computer may also be utilized to interpret and record test results. | 10-01-2009 |
20100081205 | FLUOROPHORE EMBEDDED/INCORPORATING/BRIDGED PERIODIC MESOPOROUS ORGANOSILICAS AS RECOGNITION ELEMENTS FOR OPTICAL SENSORS - Periodic mesoporous organosilicas (PMO) which incorporate an optically active molecule into the material for use as an optical indicator of target binding. This material combines the stability, selectivity, and high density of binding sites characteristic of the PMO with the sensitivity and selectivity of the optically active molecule. The material undergoes a change when exposed to a sample containing a target molecule. The change can be observed by visual inspection or through the use of fluorescence spectra. | 04-01-2010 |
20100112715 | DETECTION OF EXPLOSIVES, TOXINS, AND OTHER COMPOSITIONS - The present invention generally relates to methods for modulating the optical properties of a luminescent polymer via interaction with a species (e.g., an analyte). In some cases, the present invention provides methods for determination of an analyte by monitoring a change in an optical signal of a luminescent polymer upon exposure to an analyte. Methods of the present invention may be useful for the vapor phase detection of analytes such as explosives and toxins. The present invention also provides methods for increasing the luminescence intensity of a polymer, such as a polymer that has been photobleached, by exposing the luminescent polymer to a species such as a reducing agent. | 05-06-2010 |
20100291698 | DETECTION OF NITRO- AND NITRATE-CONTAINING COMPOUNDS - A method of the invention is a method of detecting nitramines and nitrate esters believed to be present on a sampling substrate. In the method, a sampling substrate is exposed to a first reagent that is formulated to react with nitramine- and nitrate ester-type explosives to release nitrite. The sampling substrate is then exposed to a second reagent that contains an acid to react with the nitrite and a diaminoaromatic present in either the first or second reagent, to form a triazole that will luminesce. Another method of the invention combines this process for nitramine- and nitrate ester-based explosives detection with a technique to detect nitroaromatic-based explosives using luminescent polymers, for a three-step process for the detection of explosives in these three classes. | 11-18-2010 |
20110003396 | EXPLOSIVES DETECTION MARKERS - The present invention relates to a porphyrinogen based sensor having selective binding affinity for an explosive chemical. Upon binding of the target molecule, the porphyrinogen derivative undergoes a detectable adsorption and emission of electromagnetic radiation. | 01-06-2011 |
20110045599 | System and Method for Regulating Flow in Fluidic Devices - Disclosed are a system and method for regulating flow in an exemplary fluidic device comprising a fluidic stream carrying a transport medium, sample and one or more reagents for analysis and synthesis of reaction products. The flow rate of the fluidic stream is maintained constant by adjusting the flow rate of transport medium to compensate for the introduction of sample and reagents. An embodiment controls the flow rate of transport medium using a pump, a back pressure regulator, and a variable-sized orifice. Single and multiple channel embodiments are disclosed. | 02-24-2011 |
20110177606 | DETECTION OF TRINITROTOLUENE - An ultrasensitive method for detecting analytes in a sample is provided. The method involves the use of a matrix of nanoparticles which are associated with recognition groups capable of undergoing interaction with the analyte. | 07-21-2011 |
20110212533 | DETERMINATION OF NITRATE/NITRITE CONCENTRATION IN WATER BY PHOTOCHEMICAL REDUCTION - Methods for determining the concentration of nitrates in several types of water samples by photochemical reduction without the use of toxic materials such as cadmium or hydrazine, and having an approximately 100% reduction efficiency are described. A water sample mixed with a buffered aqueous solution including ammonium salts and EDTA is irradiated using ultraviolet light having wavelengths effective for photochemical conversion of nitrate and nitrite ions (NO | 09-01-2011 |
20110287552 | REAGENT FOR MEASURING ACTIVE NITROGEN - A compound represented by the general formula (I) [R | 11-24-2011 |
20120003746 | METHOD AND KIT FOR IDENTIFICATION OF AN EXPLOSIVE SUBSTANCE WHICH CONTAINS AN OXIDANT - Field test kits for detecting explosive substances including a combination of reagents for sequentially testing for perchlorates, nitro aromatic compounds, nitroamines, nitroesters, chlorates, bromates, peroxides and nitrates are discussed. The reagents in the kits may contain methylene blue, methylene blue in a basic solution, and an acidified aromatic amine solution. Methods for employing the test kits are discussed, the methods being suitably adapted to detect the moieties suspected of being present. The kits may include a reagent for detecting explosive perchlorates, the reagent being methylene blue. The kits also include a reagent for detecting explosive nitroamines and nitroesters, the reagent being an acidified aromatic amine solution. The aromatic amine solution also can detect nitro aromatic explosives after a strong basic hydroxide has first been applied to the suspected substance. | 01-05-2012 |
20120282704 | FLUORANTHENE COPOLYMERS AND METHODS OF MAKING AND USING THE SAME - The present application relates to copolymers having at least one optionally substituted fluoranthene as a first monomer unit and at least one optionally substituted pyrrole as a second monomer unit. The copolymer may, for example, emit green light when exposed to a blue or ultraviolet radiation. Methods of making the copolymer are also disclosed, as well as methods and apparatuses for producing light and detecting nitroaromatics using the copolymer. | 11-08-2012 |
20120282705 | Explosives Detection Substrate and Methods of Using the Same - Provided herein are explosives detection substrates which include an electrospun (electro)sprayed and/or dry spun aromatic polymer, such as polystyrene, and a small molecule fluorophore. Methods for detecting an explosive material using such substrates are also provided. | 11-08-2012 |
20140106463 | METHOD AND COMPOSITION FOR DETECTING OXIDIZING SALTS - The present invention provides methods for determining the presence of oxidizing salts. According to the current invention, analyte is collected on a swipe and subsequently heated to a temperature sufficient to release a detectible vapor phase component of the oxidizing salt. The vapor phase component passes reacts with a pH sensitive molecule. Reaction of the vapor phase product with the pH sensitive molecule produces a detectible change in response intensity. | 04-17-2014 |
20150111303 | SYNTHESIS OF MOLECULE ON NANOPARTICLE SURFACE FOR STABLE DETECTION OF NITROAROMATIC EXPLOSIVES, AND SENSOR USING SAME - The present invention relates to a nanoparticle-based nitroaromatic explosive sensor for detecting nitroaromatic compounds, more specifically to stably detecting explosives in an aqueous solution by introducing, on the surface of the nanoparticles, a molecule which improves the dispersion force of the nanoparticles in an aqueous solution while binding strongly therewith, and which can simultaneously bind with the nitroaromatic compounds. | 04-23-2015 |
20150118760 | FLUORESCENT SENSING OF VAPORS USING TUBULAR NANOFIBRIL MATERIALS - A fluorescence-based sensor can comprise a nanofiber mass of nanofibers having tubular morphology and a fluorescence detector, where fluorescence of the nanofibers decreases upon contact with a nitro-containing compound. The nanofibers can comprise carbazole-cornered, arylene-ethynylene tetracyclic macromolecules of formula I: where R1-R4 are alkyl-containing groups. The tubular morphology allows for highly selective detection of trinitrotoluene over other nitro-based compounds and oxidizing organic compounds. | 04-30-2015 |
20150147818 | SENSOR FOR DETECTING EXPLOSIVE, AND PREPARATION METHOD THEREOF - The present invention relates to a sensor capable of detecting an aromatic nitro compound explosive, and a preparation method thereof, and more specifically, to a nanosensor system, and a detection method using the same, wherein a quantum dot-based sensor for detecting an aromatic nitro compound explosive can conveniently detect an aromatic nitro compound explosive with high sensitivity on the basis of a change in energy transfer between quantum dots. The method for detecting an explosive of the present invention makes an explosive come in contact with a quantum dot thin film to which an explosive can combine, and measures a change in fluorescence wavelength, thereby sensing an explosive. According to the present invention, the method for detecting an explosive on the basis of quantum dots uses a change in fluorescence wavelength which is unlike a known detection method using the change in quantum dot fluorescence intensity, and thus is not sensitive to a change in surroundings, can carry out rapid detection, and can detect even a low concentration of explosives with high sensitivity. Therefore, the present invention is expected to be extensively commercialized. | 05-28-2015 |
20150291628 | NOVEL AZA BODIPY COMPOUND FOR THE SELECTIVE DETECTION OF NITRITE IONS IN WATER AND A PROCESS FOR PREPARATION THEREOF - The present invention provides aza-BODIPY compound having formula 1 useful for detection of nitrite ions in an aqueous medium. The invention also provides a process for the preparation of aza-BODIPY compound having formula 1. For detecting nitrite ions, a dipstick device made by coating the assay powder of formula 1 in alumina over a thermoplastic or a glass solid support is used. The detection event can be monitored by noting the color change on the surface of the dipstick. Detection event by means of color change is selective for nitrite ions when compared to all other biologically important ions like SO | 10-15-2015 |
20150308956 | METHOD FOR THE DETECTION OF ANALYTES VIA LUMINESCENCE QUENCHING - A sensing element for use in the detection of an analyte based on a luminescent response, the sensing element comprising a luminescent triaryl amine compound provided as a coating on a substrate. | 10-29-2015 |
20150323430 | CHEMICAL SENSING DEVICE - A chemical sensing system includes a substrate material, a detector capable of indicating a presence of a target compound, gas, or vapor, and a heater for rapidly releasing compounds, gases and vapors from the substrate material. The substrate material acts to concentrate the compounds, gases, and vapors from a sample area for improved detection by the detector. | 11-12-2015 |
20150362474 | FUNCTIONALIZED NANOSTRUCTURES FOR DETECTING NITRO-CONTAINING COMPOUNDS - Devices, methods and systems for detecting nitro-containing compounds such as TNT, which utilize semiconductor nanostructures modified by a functional moiety that interacts with the nitro-containing compound, are disclosed. The functional moiety is attached to the nanostructures and is being such that upon contacting a sample that contains the nitro-containing compound, the nanostructure exhibits a detectable change in an electrical property, which is indicative of the presence and/or amount of the nitro-containing compound in the sample. Electronic noses for generating recognition patterns of various nitro-containing compounds, made of a plurality of nanostructures modified by versatile functional moieties are also disclosed. The devices, methods and systems are suitable for detecting nitro-containing compounds in both liquid and gaseous states and for detecting a concentration of a nitro-containing compound such as TNT as low as attomolar concentrations. | 12-17-2015 |
20150362512 | Composition, Device and Imaging System for Analysis Using Chemiluminescent Probes - The present invention provides a method for the rapid monitoring of biological analytes in a point-of-care setting by providing a smart phone; providing a sample chamber; providing a sample; providing a dark box with a smartphone holder attached to the dark box top with the camera opening positioned about the aperture, adding a biological specimen suspected of containing a biological analyte in the sample chamber; adding a bis(2,4,6-trichlorophenyl) oxalate, an imidazole and a fluorophore to the sample chamber to react with the biological analyte; placing the sample chamber into the dark box; generating an emission from the fluorophore in response to the reaction with the biological analyte; and recording a set of time-lapse images of the emission with the smartphone. | 12-17-2015 |
20160018371 | DETECTION OF GAS-PHASE ANALYTES USING LIQUID CRYSTALS - Provided herein is technology relating to detecting gaseous analytes and particularly, but not exclusively, to devices and methods related to detecting gaseous analytes by monitoring changes in liquid crystals upon exposure to the gaseous analytes. | 01-21-2016 |
20160025605 | CHEMICAL SENSING DEVICE - A chemical sensing system includes a substrate material, a detector capable of indicating a presence of a target compound, gas, or vapor, and a heater for rapidly releasing compounds, gases and vapors from the substrate material. The substrate material acts to concentrate the compounds, gases, and vapors from a sample area for improved detection by the detector. | 01-28-2016 |
20160161433 | Electrospun Polymer Fibers for Gas Sensing - Disclosed herein are fibers made from intrinsically conductive polymers, such as polyaniline, that are useful as chemiresistive gas sensors. The experimental results, based on both sensitivity and response time, show that doped PAni fibers are excellent ammonia sensors. and undoped PAni fibers are excellent nitrogen dioxide sensors. | 06-09-2016 |