19 results about "Spectrometer" patented technology

An ion mobility spectrometer is provided with at least one ionization chamber (1) through which analyte-containing gas can flow. A radiation source (2) is provided from which ionizing radiation is suitable for ionizing the analyte-containing gas at least partially, enters the ionization space (1). A separation area is located behind the ionization space (1) in the direction of flow, into which the partially ionized gas is admitted as an ion carrier gas (4) and a nearly ion-free gas is admitted as a drift gas (5) in such a way that a flow in which predominantly ion carrier gas (4) flows through cross-sectional areas (6) and predominantly drift gas (5) flows through other cross-sectional areas (7, 7′), becomes established at least in the inlet area of the separation area (8). The drift gas (5) and ion carrier gas (4) flow unidirectionally and the cross-sectional areas (6), through which predominantly ion carrier gas (4) flows, are smaller in at least one dimension than the cross-sectional areas (7, 7′), through which predominantly drift gas (5) flows.

The invention discloses a mass spectrometer based RH dynamic decarbonization method and device for real-time calculation of carbon content when in vacuum oxygen decarburization, and realization of automatic gun lifting and stopping of oxygen blowing when the carbon content of molten steel reaches target carbon content. The decarbonization method comprises the following steps: when a heat is started, the weight, initial component and target component data of the molten steel is collected, in the smelting process, waste gas real-time flow rate acquired by a waste gas flow meter and waste gas real-time component acquired by a mass spectrometer are collected; according to relevant information of the molten steel, and relevant data of the collection and analysis time delay of the waste gas and gun lifting and blowing-stop time delay of a top gun, the carbon content of the molten steel is calculated in real time, and when the current carbon content is smaller than or equal to the target carbon content, a PLC (programmable logic controller) is notified to stop oxygen blowing and lift the gun. The mass spectrometer based RH dynamic decarbonization device can realize the automatic control of mass spectrometer based RH dynamic decarbonization, is precise in control of process and high in production precision, can shorten the smelting cycle, and reduces the cost.

The invention relates to a wine liquid detection device. The wine liquid detection device comprises a wine receiving device, a sample tank for detecting a wine liquid, and a connecting pipe through which the wine receiving device and the sample tank are connected, wherein the sample tank comprises a basic body, the top of the basic body sinks inwards to form a liquid inlet groove, and the side part of the basic body sinks inwards to form a liquid outlet groove communicated with the liquid inlet groove; a first mounting groove and a second mounting groove are also formed in the basic body, are positioned on the same straight line and are respectively communicated with the liquid outlet groove, quartz window sheets are respectively arranged on the first mounting groove and the second mounting groove, a Raman spectrometer for detecting the wine liquid is also mounted in the first mounting groove, and a light trap for absorbing lasers in the sample tank is also mounted in the second mounting groove.

The invention discloses a calibration optical system based on a geosynchronous orbit differential absorption spectrometer. The calibration optical system is composed of an oscillating mirror system, afront optical system, a solar diffuse reflection plate assembly and a solar light blocking door assembly. The oscillating mirror system is composed of a pointing mirror, a sweeping shaft system, a motor harmonic group and an oscillating mirror U-shaped bracket. The front optical system consists of a primary mirror, a secondary mirror, a third mirror, a plane mirror and a slit. The solar diffuse reflection plate assembly consists of a Teflon diffuse reflection plate and corresponding structural components. The solar light blocking door assembly includes a solar baffle and a motor assembly. Thecalibration optical system introduces a bidirectional reflection distribution function of external solar illuminance with known spectral irradiance at suitable on-board calibration time, thereby accurately measuring the diffuse reflection plate and establishing an approximate lambertian surface source with known spectral radiance to provide known radiation input for a remote sensor. The system has high measurement accuracy, compact volume, light weight and high reliability.

The invention discloses an inorganic sensitive layer based surface enhanced Raman spectrum detection technology and material preparation thereof. According to the detection technology, a surface enhanced Raman spectrum material based on an inorganic sensitive layer is used as an active substrate of a surface enhanced Raman scattering, and is exposed in the small molecule atmosphere; a new solid substance formed by specific reaction of the inorganic sensitive layer and small molecules to be detected by a Raman spectrometer is detected, and the type of the small molecules is obtained according to the Raman spectrum of the new solid substance; according to the preparation method, a colloid electrostatic self-assembly method, a thiourea-induced isotropic shell growth method, a metal halogenation method and a physical deposition method are used for a precious metal nanoparticle colloidal solution, a metal salt solution and a thiourea solution to prepare the material in which precious metalnanoparticles are coated with a metal oxide layer, or the precious metal nanoparticles are coated with a metal sulfide layer, or the precious metal nanoparticles are coated with a metal halide layer.The technology can be used for real-time online detection of hydrogen sulfide, carbon disulfide, hydrogen chloride, mustard gas, nitrogen dioxide and the like.

The invention discloses an oolong place-of-origin traceability method, which comprises the following steps: S1, sample collection: collecting tea samples of southern Fujian and northern Fujian; S2, utilizing a headspace extraction-gas-phase ion transition technology to measure and analyze southern Fujian and northern Fujian oolong sample volatile matters to obtain a GC-IMS (Gas Chromatograph-Ion Mobility Spectrometer) result map; S3, carrying out multivariate statistical analysis on the compound measured by the GC-IMS and the relative concentration data of the compound; carrying out PCA (Principal Component Analysis) on the measured relative concentration of the compound. The oolong place-of-origin traceability method has the advantages that oolong places of origin can be accurately and efficiently distinguished to realize the classified identification and analysis of the oolong, the benefits of consumers and enterprises which produce geographical indication protection products can beprotected, and the Fujian oolong place-of-origin protection can be truly realized.

The invention belongs to the technical field of food analysis, and relates to a method for rapidly determining streptomycin and dihydrostreptomycin in honey by a hydrophilic interaction chromatography-tandem mass spectrometry. The method is achieved by the following steps: (1) sample pretreatment: weighing a sample and adding an extracting solution, performing vortex mixing until the honey is completely dissolved, ultrasonically extracting, adjusting the volume with the extracting solution after taking out, uniformly shaking, filtering to obtain a filtrate to be ready for use, and purifying toobtain a solution to be detected; (2) preparation of a standard stock solution and a standard working solution; (3) preparation of a matrix matching working solution; (4) sample analysis and detection: qualitatively and quantitatively detecting and analyzing the solution to be detected by a hydrophilic interaction chromatography-triple quadrupole mass spectrometry; (5) drawing a standard curve, and then detecting and analyzing the solution to be detected by an ultra-high performance liquid chromatography-tandem mass spectrometer. The method provided by the invention has the advantages of shortening the inspection time, improving the detection efficiency, reducing the detection cost, avoiding the pollution of an ion pair reagent to the chromatogram and the mass spectrum, and having highersensitivity.

The invention relates to a method for creating an animal pharmacokinetic model for a drug multi-peak phenomenon. The method includes the following steps: selecting at least 6 dogs with three male dogsand three female dogs, carrying out dosing based on a certain dosage, collecting blood samples after dosing, for a blood sample time point, at least collecting two block sampling points before a first peak, at least collecting three blood sampling points near a highest value of each peak, and at least collecting three blood sampling points after a last peak; measuring the blood drug concentrationby using a liquid mass spectrometer; and calculating a fitting constant (DM) for five types of each dog and indicating a minimum value to be a pharmacokinetic standard model class of the dog. According to the invention, the standard model can be established in the dog, the pharmacokinetic parameters of the drug are calculated correctly, and thus a reasonable dosing plan is provided. The method also can be used for calculating and predicting the drug concentration of the drug in the dog, so that a defect of excessive dog dosing amount due to the small pharmacokinetic parameters of the drug formulti-peak phenomenon calculation by the existing pharmacokinetic software is overcome.

The invention discloses a detecting method for cholesterol metabolites in brain tissue. The detecting method comprises the steps that firstly, a cryopreserved brain tissue sample is accurately weighed; then a first reagent is added to conduct first-time extraction, a first extracting solution is collected, then a second reagent is added to conduct second-time extraction, a second extracting solution is collected, and the two-time extracting solutions are combined; and finally, after concentrating and volatilizing drying, a third reagent is added to conduct redissolving, and the extracting result is detected through a liquid chromatograph-mass spectrometer.

The invention relates to a trace organic matter detection technology, and aims at providing an automatic trace organic matter detection gas circuit system for dioxin detection equipment. The system comprises gas inlet tubes of flue gas, standard gas and purge gas, and a pulse valve arranged at an inlet of a time-of-flight mass spectrometer, wherein the flue gas, the standard gas and the purge gasenter a preconcentrator through three-way joints; an outlet of the preconcentrator is sequentially connected with a gas chromatograph and the pulse valve; a gas outlet hole is formed in the middle ofa pulse valve flange; a gas inlet tube is communicated with the gas outlet hole to form a valve body channel; a standard gas tube and an exhaust tube that are communicated with the valve body channelare mounted on the side edge of the flange; the gas circuit system is mounted in a cabinet; and the gas inlet tube of the standard gas, the gas inlet tube of the purge gas and the two gas inlet tubesof the flue gas are mounted on a cabinet body of the cabinet via an integrated gas circuit board. According to the system, tubings are more reasonable and tidy in arrangement, strong in interchangeability and convenient to dismount, and are connected in a clamping and sleeving manner. The pulse valve can achieve a function of supplying standard gas for equipment standardization and equipment operation condition detection.

The invention discloses a urea [<13>C] abundance detection method. The method comprises the steps of S1, obtaining urea [<13>C] particles, grinding the urea [<13>C] particles, precisely weighing 0.5 g of ground urea [<13>C] particles, putting the urea [<13>C] particles in a 20 ml measuring flask, adding a proper amount of acetonitrile, conducting the ultrasonic treatment for 9-15 minutes, cooling to the room temperature, feeding 1 [mu]L of a test solution into a liquid chromatography-gas chromatograph-mass spectrometer, recording a generated chromatogram and the ion signal response intensities of quasi-molecular ions (12C16ON2H5+, 13C16ON2H5+ and 13C18ON2H5+, wherein the mass numbers of the above quasi-molecular ions are respectively 61.0402, 62.0435 and 64.0478, and the above quasi-molecular ions are respectively marked as A, B and C), and calculating according to the formula X=(B+C/A+B+C)*100% to obtain the abundance of urea [<13>C]. According to the technical scheme of the invention, unique chromatographic conditions and mass spectrometry conditions are adopted, so that the detection is simpler and more convenient. Meanwhile, human error factors during the detection process are reduced, so that the reproducibility of detection results is improved. Detection results are more accurate.

The invention discloses a method for detecting alkaline colorants in livestock meat products. The method for detecting the alkaline colorants in the livestock meat products comprises the steps that extraction of samples to be detected is carried out by using an extraction solution, a liquid supernatant obtained after extraction is purified by a WCX solid-phase extraction column to complete samplepretreatment, and then, the detection method for simultaneously screening and confirming the seven alkaline colorants in the livestock meat products is established by using an ultra-high efficient liquid chromatography-series connection quadrupole rod linear ion trap mass spectrometer. The method for detecting the alkaline colorants in the livestock meat products has the characteristics of simpleoperation, efficient flux, qualitative accuracy, high sensitivity, friendly environment and the like, is suitable for screening and confirming the various alkaline colorants in the meat products, andavoids detection of false positive samples.

The invention provides a method for determination of heavy metals in a biological sample, and belongs to the technical field of chemical analysis. Firstly, the biological sample is combusted and enriched to obtain an ash sample, and then the obtained ash sample is determined by an X-ray fluorescence spectrometer. The content of the heavy metals in the biological sample is determined through a combustion-XRF combination method, acid-solution digestion is not required, and the test method is simple and efficient and does not affect the health of experimenters. In addition, the biological sampleis combusted, the weight and size of the sample are reduced, the content of the heavy metals is increased exponentially so that the metal elements can be concentrated and enriched, and thus the heavymetal element detection effect of an XRF instrument is improved by 2-20 times.