238 results about "Aerosol sampling" patented technology

According to some embodiments, systems and methods for surface impact ionization of liquid phase and aerosol samples are provided. The method includes accelerating a liquid or aerosol sample, colliding the sample with a solid collision surface thereby disintegrating the sample into both molecular ionic species (e.g., gaseous molecular ions) and molecular neutral species (e.g., gaseous sample), and transporting the disintegrated sample to an ion analyzer. Some embodiments of the method further comprise discarding the molecular neutral species. Such embodiments transport substantially only the molecular ionic species to the ion analyzer.

The invention relates to a large-flow aerosol sampling device, which is characterized in that the aerosol sampling device mainly comprises a macroparticle cutter, a concentrating separator and a sampler. The macroparticle cutter comprises an inner tube, an outer tube, a top cap, an insect preventing net cover and an air flow output pipe, wherein a circle of air flow inlets are arranged between the outer tube and the top cap; an air flow spray nozzle is formed between the inner tube and the outer tube; the air flow output pipe is arranged in the insect preventing net cover and fixed on the tapered bottom surface of the outer tube. The aerosol concentrating separator comprises an outer shell, and an upper spray nozzle and a lower spray nozzle which are respectively arranged, wherein a ventilation clearance is reserved between the upper spray nozzle and the lower spray nozzle, so as to form a preliminary spray nozzle separated by small particles; ventilation clearances are reserved among the lower spray nozzle and the air flow inlets, so as to form a secondary spray nozzle. The aerosol sampling device has the advantages of simple structure and small volume, and can be used for the concentration, the separation and the real-time monitoring of biological aerosol in the atmosphere.

According to some embodiments, systems and methods for surface impact ionization of liquid phase and aerosol samples are provided. The method includes accelerating a liquid or aerosol sample, colliding the sample with a solid collision surface thereby disintegrating the sample into both molecular ionic species (e.g., gaseous molecular ions) and molecular neutral species (e.g., gaseous sample), and transporting the disintegrated sample to an ion analyzer. Some embodiments of the method further comprise discarding the molecular neutral species. Such embodiments transport substantially only the molecular ionic species to the ion analyzer.

Provided is an aerosol collector of reduced size having an aerosol inlet, an impactor plate containing several particle size-selecting nozzles therethrough, a replaceable collection layer and a fan having a power supply such as a battery pack, all of which fits a small container, attachable to, e.g., the lapel of the user, means to rotate the fan and move the aerosol through the sampler, so as to draw airborne particles through the inlet and through one or more nozzles, to impact the particles on the layer for analysis of same.

A quantitative fit test (QNFT) system and method for assessing the biological fit factor (FF) performance of respiratory protective devices. The biological QNFT system includes the following three main elements: an aerosol generation system; an exposure chamber; and an aerosol sampling subsystem. The aerosol sampling subsystem includes an aerosol spectrometer that counts particles in discrete size units ranging from 0.5 to 20 micrometers (μm) making it possible to obtain several size-specific FF measurements from a single respirator fit test. A virtual impactor in the aerosol generation system increases the number of challenge particles in the primary target size of interest (1 to 5 μm) and increases the sensitivity of the method allowing FF values of up to one million to be measured without the need to correct for in-mask background particles.

The invention discloses an environmental aerosol direct sampling gathering sample injecting device and a quantitative analysis method. The environmental aerosol direct sampling gathering sample injecting device comprises an environmental aerosol sampling module, an aerosol atomization dissolving generation module, an aerosol condensation growing up module, an aerosol number concentration gathering module and a base body gas removing module. The environmental aerosol sampling module comprises a sampling port, a sampling pump and a connection pipeline, preferably, the sampling pump is a membrane pump; the aerosol atomization dissolving generation module comprises an atomizer, a fog chamber, a drying device and a connection pipeline, the atomizer is used for atomizing a standard solution to generate fog drops, the fog room is used for removing large fog drops and the drying device is used for dissolving the fog drops output from the fog room and removing steam contained in the fog drops. Due to the mode that the environmental aerosol direct sampling gathering sample injecting device serves as an aerosol sample injection system and is used in cooperation with an ICP-MS, quality sample injection rate of an element to be measured in environmental aerosol can be measured quantitatively, and then sample injection volume flow of the environmental aerosol is divided by the quality sample injection rate to acquire the quality volume concentration of the element to be measured.

The invention provides a sampling and sample introduction apparatus for aerosol. Application of the apparatus in ion mobility spectrometry facilitates realization of on-line sample acquisition and analysis of sample introduction for ion mobility spectrometry. According to the invention, an impingement aerosol sampling technology enables a sample to be enriched on the surface of a sample slide in a sampling impingement chamber, on-line direct sampling of atmospheric aerosol can be carried out, sampling time can be set to be continuous or discontinuous, and time interval of sampling can also be set; sample introduction is carried out immediately after sampling is finished, thereby enabling sampling and sample introduction to be an organic integral body; sample introduction enables air-flow resistance of surface hot blowing of gas to be reduced; an enriched sample enters into ion mobility spectrometry for detection and analysis after thermal desorption.

To provide an inductively-coupled plasma torch capable of realizing a GC analysis or the like and a solution analysis by the same torch without removing a capillary tube, etc. The injector tube of the inductively-coupled plasma torch includes an outer injector tube 11 for introducing an atomized solution sample or the like into the inductively-coupled plasma, and an inner injector tube 12 for introducing gaseous molecules into the inductively-coupled plasma, housed in the outer injector tube as integrated and coaxially with it. The inner injector tube is able to convey make-up gas, and has a capillary tube 4 for conveying gaseous molecules and carrier gas together. For sample introduction in analyzing a gaseous sample, the inner injector tube 12 is used, and for sample introduction in analyzing an aerosol sample, the outer injector tube 11 is used.

The invention relates to a preparation method of a flexible silicon dioxide aerosol. The preparation method comprises the following steps: taking methyl triethoxysilane as the precursor, methanol as the reaction solvent, and oxalic acid and ammonia water as the reaction catalyst, adding hydroxy-terminated polydimethylsiloxane during the reaction process, and finally carrying out a supercritical fluid drying technology so as to obtain silicon dioxide aerosol blocks with excellent elasticity. The prepared silicon dioxide aerosol sample has a density of 0.06 g / cm3, a specific surface area of around 395 m2 / g, an elasticity modulus of 2.39*10<4> N / m2 to 4.82*10<4>N / m2, and a hydrophobic angle of 158 degrees. Compared to the ordinary silicon dioxide aerogel, the flexible silicon dioxide aerosol can bear a higher temperature and has more stable properties. The application range of aerosol is enlarged due to the excellent elasticity, and the flexible silicon dioxide aerosol can be applied to fields such as damping, heat insulation, sound insulation, and the like.

An aerosol biological collector / analyzer, and method of collecting and analyzing an aerosol sample for diagnosis is provided. In particular, the current invention is directed to an airborne aerosol collection and bacterial analysis system and method, capable of collecting an airborne aerosol sample and preparing it for analysis via aerodynamic shock in a single-step.

A modular aerosol sample detection system is provided comprising a sample collector couplable to an aerial vehicle and provided with at least one retrievable collection sample plate, which controllably rotates to collect aerosol samples on a multiplicity of collection spots arranged in multiple concentric tracks on the collection disk, and a multi-channel TOF removably couplable to the collection sampler to analyze the collected samples.

This disclosure provides a method for detecting and / or identifying uncultured bacteria. The sample is an aerosol sample selected from a group consisting of cough, sneeze, saliva, mucus, bile, urine, vaginal secretions, middle ear aspirate, pus, pleural effusions, synovial fluid, abscesses, cavity swabs, serum, blood and spinal fluid. The method comprises obtaining absorption spectra (AS) of the sample, extracting and processing the acquired data, thereby detecting and / or identifying the bacteria.

The invention relates to an on-line aerosol carbon component collecting analyser. The analyser is characterized by comprising two parts, namely a carrier gas circuit system and a sampling-analyzing gas circuit system, wherein the carrier gas circuit system comprises a He gas circuit, a He-purge gas circuit, a He / Ox gas circuit and a He / CH4 gas circuit; and the sampling-analyzing gas circuit system comprises a sampling gas circuit, an analyzing-oxidizing furnace and an analyzing gas circuit. The on-line aerosol carbon component collecting analyser can continuously collect an atmospheric aerosol sample on line, chooses or automatically sets a temperature rise program according to needs and analyzes carbon components in the atmospheric aerosol by using a laser transmission method and a correction method. Besides, the on-line aerosol carbon component collecting analyser has the advantages of strong practicability, low running cost, convenient management, suitability for laboratory researches and environment-protection automatic monitoring stations all over China and capability of acquiring realer and more accurate carbon component data of the atmospheric aerosol.

The invention discloses a continuous monitor for detecting an aerosol sample, and relates to a continuous monitor for online detection of an aerosol sample by utilizing an ion mobility spectrometry technique. The development of the monitor is based on the ion mobility spectrometry technique; and an ion mobility spectrometry analysis method is used as detection means. The instrument employs air as a sample carrier gas and a drift gas, and a set of purifying and drying gas circuit with a complete system, as well as a uniform field ion mobility tube. An impact type aerosol sampling device is used for sampling samples from atmosphere and gathering the samples to a piece of polytetrafluoroethylene high temperature resistant sampling cloth which is processed specially; the sampling cloth which employs crawler-type transmission is used for gasifying the samples by thermal resolution, and then the samples are carried by the carrier gas to enter the monitor for online detection and analysis. Interval sampling or continuous sampling can be configured in sampling time; usually, the interval sampling time is set to 10-30 s; the time consumption for analyzing the sample once is lower than 60 s; the sensitivity is very high; and the related standard for analysis and detection is achieved. A software control instrument can be used for realizing warning patterns of different aerosol samples.

The invention relates to a rodent oronasal suction dynamic exposing device, which is characterized in that the rodent oronasal suction dynamic exposing device comprises at least one section of combinable exposing chamber, wherein the exposing chamber comprises an outer tube and an inner tube positioned in the outer rube, a plurality of aerosol sampling pipes and a plurality of animal tube insertion nozzles are arranged on the tube wall of the outer tube, animal tubes are correspondingly inserted and arranged on the animal tube insertion nozzles, an aerosol suction pipe is respectively penetrated into each animal tube insertion nozzle, a top cover of the exposing chamber is arranged on the top of the highest section of the exposing chamber, the middle of the top cover is provided with a mixed aerosol air inlet, an aerosol air inlet pipe is connected above the air inlet, the air inlet end of the air inlet pipe is connected with an aerosol generator, the outer tube and the inner tube of the lowest section of the exposing chamber are respectively and correspondingly positioned on an outer tube base and an inner tube base, at least one circle of vent holes are arranged on the inner tube base arranged between the outer tube and the inner tube of the exposing chamber, an aerosol air outlet is arranged in the middle of the outer tube base, the air outlet is connected with an aerosol air outlet pipe, and the outlet end of the air outlet pipe is connected with an air pump. The invention has the advantages of ingenious structural design and convenient operation, and can be widely used in the animal suction test research process.

The invention relates to a method for sampling ultrahigh flow aerosol and a sampler. The sampling method comprises the following steps of: pumping gas containing aerosol particles into the sampler; making the gas flow toward a collecting groove after being sprayed through a nozzle; and deviating the gas flow through the collecting groove, wherein particles with large particle diameters are collected onto a non-woven fabric of the collecting groove, and particles with small particle diameters move along with fluid along a flow line and are collected by a filtering material arranged below the collecting groove. In the invention, an impactor is adopted for capturing larger particles, and the pressure resistance on the filtering material is reduced, so that a vacuum pump with low power can be used, and the size and the weight of the sampler are reduced fundamentally. The invention further provides a method for reducing the pressure resistance of the filtering material by performing factional sampling with the impactor. An ultrahigh flow aerosol sampler which is detachable and is convenient to move is researched and developed by applying the method.

The present invention relates to a method and apparatus for redirecting a flow of aerosol-containing air into, for example, an aerosol sampler. The apparatus comprising a device for redirecting a portion of the flow of aerosol-containing air into an air intake disposed within the flow of aerosol-containing air, preferably using eduction caused by a pressurized gas stream. A sampling tube having an opening for receiving aerosol-containing air is disposed within the air intake to collect the redirected portion of aerosol containing air.

The invention discloses a method for detecting cigarette smoke aerosol particle size distribution, comprising a smoking machine (1), a diluter (2), an aerosol particle size spectrometer (3) and a temperature regulator (4); wherein, the smoking machine (1) is communicated with the diluter (2) through an electromagnetic valve (9) by a metallic conduit (8), the other end of the diluter (2) is communicated with the aerosol particle size spectrometer (3) by the metallic conduit (8), and the diluter (2) is provided with a waste gas outlet G; a heater (5) is communicated between the smoking machine (1) and the diluter (2) as well as between the diluter (2) and the aerosol particle size spectrometer (3) by the metallic conduit (8), and the heater (5) is controlled by the temperature regulator (4) and is sequentially communicated with an electronic flowmeter (6) and a filter (7). The method ensures the collected smoke gas aerosol sample to be in accordance with burning suction requirement of cigarette samples and leads the concentration of sample gas entering the aerosol particle size spectrometer to be within the valid detection range; when in real-time cigarette smoke detection, a technology of heating part of connecting pipelines is adopted, so that the loss of cigarette smoke aerosol particles can be reduced in the transmission process.

The invention discloses a method for detection and differential diagnosis of Brucella in an aerosol. The method comprises the following steps: (1) acquisition of an aerosol sample; (2) extraction of genome total DNA of the aerosol sample; (3) detection: a step of carrying out PCR amplification by using specific primers and a kit; (4) establishment of a standard curve and a melting curve: a step of establishing the standard curve of pEASY-T3-VirB10 positive standard plasmid and the melting curve of an amplification system; and (5) judgment: a step of judging whether the aerosol sample contains Brucella. The invention further discloses the specific primers (as shown in SEQ ID No. 3 to 9) and the kit (composed of the specific primers, the pEASY-T3-VirB10 positive standard plasmid, an SYBRGreenI real-time fluorescent quantitative PCR reagent and ddH2O). The method provided by the invention is applicable to detection and identification of Brucella in the aerosol in a culturing farm and to detection and identification of samples like clinical blood, serum, milk and tissue.

A miniature, passive aerosol particle sampler comprises a scanning electron microscopy mount provided with a collection surface and a removable mesh cover comprising a spacer ring and a mesh sheet. A sampling and analysis method comprises scanning electron microscopy and image analysis to determine a particle-count size distribution. A deposition velocity model comprising a theoretical component and an empirical component is used to determine from the particle-count size distribution the average airborne mass concentration of aerosol particles to which the sampler was exposed.

The invention provides a tandem differential electromobility measuring instrument and its measuring method. According to the invention, monodispersed phase particles with particle size to be measured are screened by SMPS, the screened particles with particle size to be measured enter a perfluorosulfonic acid tube for moisture absorption, particle size distribution of a sample obtained after moisture absorption is measured in DMA, and hygroscopic growth factor is calculated; or the screened particles with particle size to be measured enter a heater to be heated for volatilization, particle size distribution of an aerosol sample obtained after heating for volatilization is measured in DMA, and finally volatility of the particles at different temperatures is calculated. According to the invention, hygroscopic growth factor and volatile proportion of the fine particles in the atmosphere can be rapidly and accurately measured, and the purpose of understanding moisture absorption characteristic and volatility of nanoparticles in various environments can be achieved.

The invention discloses a collecting device of fog and automatic-sorting aerosol and application method thereof, which relates to technical field of integrated separate collection for collecting information of ground wet deposition and aerosol for meteorological detection. In the invention, both ends of an air inlet channel are repetitively connected with an air inlet, a fog absorbing network, the lower end of the fog absorbing network is connected with a fog gathering container, the lower end of the fog gathering container is connected with a fog meter which is provided with a sensor, one side of the fog absorbing network far away from the air inlet channel is provided with an air blower; a first aerosol collector, a second aerosol collector are respectively connected with an aerosol air channel, and an aerosol air channel controller is provided with a regulator; the data output end of the sensor is connected with a first data input end of a micro data processor, and a second data output end of the micro data processor is connected with the data input end of the regulator. The invention realizes purposes that the collecting efficiency is high, the affect of vertical rainfall and water evaporation under detection field environment on the fog collection can be effectively avoided, and the cost is reduced.

An apparatus and system for detecting and measuring particles entrained in an air stream. The apparatus and system include an enclosure configured to define an aerosol sampling path and an optical path. The aerosol sampling path allows an air stream having entrained particles to pass therethrough. The aerosol sampling path intersects with the optical path. The intersection defines a sensing region. The sensing region may use a band pass filter to improve signal to noise ratio. At least one flow rate sensor may be located near the sensing region. A light source provides a light beam along the optical path. The light beam intersects with the air stream in the sensing region, wherein the light beam may be scattered by entrained particles contained in the aerosol sampling path.

The invention relates to a microorganism aerosol sampling device which comprises a microorganism solution atomization generation device, a compressed air gasification device, a microorganism aerosol generation device and a sampling vessel, wherein the microorganism solution atomization generation device is connected and mixed with the compressed air gasification device and then connected with the front end of the microorganism aerosol generation device; the sampling vessel is connected onto the tail end of the microorganism aerosol generation device. According to the invention, the microorganism solution atomization generation device, the compressed air gasification device, the microorganism aerosol generation device and the sampling vessel are adopted, and through arrangement of quincuncial spraying holes and refining spray nozzles, the generation quality of microorganism aerosol is ensured; through arrangement of a boosting cylinder, a primary filter cartridge and a pressure stabilization cylinder, the quality and precision of air obtained through compression of the compressed air gasification device are ensured, and the generation quality of microorganism aerosol is further ensured; a sampling film and normal saline are adopted for sampling, so that the sampling quality and sampling rate are ensured, and the sampling capacity is improved.

A sample probe is provided for sampling aerosols within a wall cavity. The sample probe includes a hollow tubular body having a distal end, an intermediate portion, a proximal end and a central passageway. The distal end includes a sharp beveled point provided to inhibit the blockage of a distal open inlet if the distal end is positioned against an object. The probe further includes one or more holes projecting through the probe's tubular body, preferably positioned substantially adjacent to the probe's distal end. The probe further includes a radially projecting region adapted for sealing a hole or opening formed to obtain access to a wall cavity. Moreover, the probe includes a proximal open outlet adapted to connect to the inlet of an aerosol sampling cassette.

A method recovering one or more nonvolatile compounds from an exhaled aerosol collected on an electrostatic filter membrane (205) comprises eluting the nonvolatile compounds from the filter with a polar solvent and collecting the eluate. The method is useful for processing samples collected from a portable breath analysis device comprising a sampling filter membrane for analysis.