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WO2012100364A1 - Dispositif compact et portatif permettant le prélèvement d'échantillons représentatifs d'air avec du matériel à faible débit afin de déterminer de manière qualitative et quantitative la présence de composés chimiques organiques et inorganiques dans l'air, et procédé d'utilisation dudit dispositif - Google Patents

Dispositif compact et portatif permettant le prélèvement d'échantillons représentatifs d'air avec du matériel à faible débit afin de déterminer de manière qualitative et quantitative la présence de composés chimiques organiques et inorganiques dans l'air, et procédé d'utilisation dudit dispositif Download PDF

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Publication number
WO2012100364A1
WO2012100364A1 PCT/CL2011/000008 CL2011000008W WO2012100364A1 WO 2012100364 A1 WO2012100364 A1 WO 2012100364A1 CL 2011000008 W CL2011000008 W CL 2011000008W WO 2012100364 A1 WO2012100364 A1 WO 2012100364A1
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WO
WIPO (PCT)
Prior art keywords
sampling
filters
air
samples
cutting head
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CL2011/000008
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English (en)
Spanish (es)
Inventor
Francisco Javier Cereceda Balic
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Universidad Tecnica Federico Santa Maria USM
Original Assignee
Universidad Tecnica Federico Santa Maria USM
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Universidad Tecnica Federico Santa Maria USM filed Critical Universidad Tecnica Federico Santa Maria USM
Priority to PCT/CL2011/000008 priority Critical patent/WO2012100364A1/fr
Publication of WO2012100364A1 publication Critical patent/WO2012100364A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
    • G01N1/2205—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling with filters

Definitions

  • Compact and portable device for taking representative air samples in low volume equipment, to determine qualitatively and quantitatively the presence of organic and inorganic chemical compounds in the air, and operating method of the device.
  • the present invention consists of a device for taking representative air samples, in order to determine qualitatively and / or quantitatively the presence of compounds, organic or inorganic chemicals in the air. Specifically in a compact and portable device for taking representative air samples in low volume equipment, to quantitatively determine the presence of organic and inorganic chemical compounds in the air, and an operating method of the device. BACKGROUND OF THE INVENTION
  • COs Organic compounds
  • PAHs polycyclic aromatic hydrocarbons
  • PCBs polychlorinated biphenyls
  • the invention consists of a device for taking representative air samples, and associated sampling procedures for the analysis of COs especially in the case of COSVs.
  • Positive artifacts (overestimation of the concentrations of COSVs in the MP): These occur when COSVs that are in the gaseous phase of ambient air are adsorbed on the filter material or on the MP collected in it.
  • Negative artifacts (underestimations of the concentrations of COSVs in the MP): They are caused by the volatilization of the COSVs from the MP that was collected in the filter, product of the vacuum generated by the suction pump of the collecting equipment. These volatilized COSVs are captured by the PUF adsorbent.
  • Low-Vol low-volume equipment
  • S. Samp.de equipment of the Thermo firm operates with flows of 10 L / min, which also emulates the average volume of air a person breathes in a 24-hour period of continuous monitoring, which is very convenient for toxicological studies.
  • Low-Vol equipment does not completely eliminate artifact and other sampling considerations are necessary.
  • An alternative to reduce the positive and negative artifacts is to collect the COSVs in the gas phase before passing through the filter. This process strips the gaseous stream of its COSVs, by adsorption in a denuder (D), defined as a gas capture device. Because the particle gas distribution is disturbed during sampling, for example in the case of PAHs and / or PCBs associated with the MP that have a greater tendency to volatilize and where to solve this problem a post-filter adsorbent (PUF) is placed that captures volatilized species.
  • PAF post-filter adsorbent
  • the device consists of a cylinder of 35 mm in length and 40 mm in diameter, which has been divided into a large number of small capillary channels parallel to the air flow, coated with some adsorbent material (activated carbon, graphite or resins such as XAD)
  • adsorbent material activated carbon, graphite or resins such as XAD
  • the main feature of HCDs is that they offer a large adsorption surface without representing an obstacle to air flow (including MP); that is, there are no losses of MP and the gas phase compounds are completely adsorbed on the inner lining of the denuder capillary channels.
  • COSVs adsorbed on the MP decompose when reacting with ozone, S0 2 and N0 2 that reach the particle filter.
  • the present invention provides a compact and portable device for taking representative air samples, in low volume equipment, to determine qualitatively and quantitatively the presence of organic and inorganic chemical compounds in the air.
  • the device or cartridge consists of a container composed of assembled, compact and portable compartments, made of a material with minimal adsorbent and absorbent capacity (Duralumin, for example), in which different configurations of filters and adsorbents can be installed depending on the case.
  • a main objective of the invention is a compact and portable device for taking representative air samples in low volume equipment, to determine qualitatively and quantitatively the presence of organic and inorganic chemical compounds in the air, which operates with smaller or equal flows.
  • a cutting head which defines the maximum size of particles to be collected
  • a main body connected to the cutting head, in which optionally as many denuders can be installed as necessary to retain by adsorption / absorption the chemical compounds in the gas phase without interfering with the passage of the particulate material
  • a filter compartment in which filter holders with their filters are accommodated
  • an adsorbent compartment with polyurethane foam filters (PUFs) connected to the filter compartment, to install as many PUFs as necessary
  • an outlet head which directs the remaining gases from the sampling towards a suction pump;
  • the cutting head has a nozzle consisting of a Venturi tube, whose geometry is
  • the compartments that make up the device are connected to each other under pressure, and the tightness is achieved with the help of clips and o-rings.
  • the cutting head has a cavity inside, which is formed from two concentric cylinders of different diameters. Between the diameters of said concentric cylindrics, an edge perpendicular to the direction of the flow is generated, where an impactor rests, designed with symmetrical holes to allow air flow containing particles smaller than the size defined in the cutting head and to retain them in its center by impact particles larger than the size defined by the cutting head, due to the jet generated by the Venturi in the inlet nozzle of the cutting head. Said impactor defines the maximum particle size that will be collected by the filters in the filter compartment.
  • the filter holders consist of two flat grids that fit each other, so that the filter is retained between the two grilles.
  • This device was designed to be used with any pumping system that has mass flow control.
  • Another main objective of the invention is to provide a method for taking representative air samples in low volume equipment, to determine qualitatively and quantitatively the presence of organic and inorganic chemical compounds in the air, which comprises the steps of: cleaning and preparing , a device as defined in claims 1 to 7; take samples with the device; transport the device to and from the sampling site; store the device; and extract the filters and denuders from the device for analysis.
  • the step of cleaning and preparing the device, before the sampling stage comprises: washing the device with HPLC acetone a clean room under a static eliminator; wash each of the polyurethane foam filters (PUFs) sequentially with solvents of different polarity; and certify the final extract obtained from washing, chromatographically for each of the PUFs, in order to ensure its cleanliness.
  • the step of taking samples with the device includes: installing the device to a sampling device, in the place of sampling; and program the sampling sequences for each device installed in the sampling equipment, according to the purpose of the sampling to be performed.
  • the step of transporting the device to and from the sampling site comprises: wrapping the device, clean and prepared, in pre-washed aluminum foil with organic solvent and covering the entrance of the cutting head with its respective lid, to take it to the place of sampling; and wrap the device, once removed from the sampling equipment, in pre-washed aluminum foil with organic solvent and cover the entrance of the cutting head with its respective lid, to take it to the place of analysis.
  • the step of storing the device comprises: wrapping the closed device and storing it in the dark with refrigeration at less than 4 ° C until the moment of analysis; or stabilize, filters, denuders and PUFs, introducing them in their respective extraction vessels, with the appropriate organic solvents and with the dosage of the standards that will be used for quantification and quality control of the analysis and finally store them in the dark with refrigeration unless from 4 ° C until the time of analysis when the wait must exceed 24 hours.
  • the step of extracting the filters and denuders from the device for analysis comprises: extracting the compounds of interest from the filters and denouncing by chemical procedures with analytical equipment and appropriate organic solvents; vacuum filter the extract obtained from the filters and denounce to eliminate possible particles that have come off; bring the filtered extract to a process of volume reduction and subsequent purification; subject to extraction, filtration and volume reduction procedures in the same way, extracts of particulate material (MP) and gas phase separately; purify the samples, separating the families of compounds of interest from the rest of the chemical compounds present in the sample; and determine the concentrations of the compounds of interest present in the purified samples, by an analysis by capillary gas chromatography and adequate detection of each compound, for each sample.
  • MP particulate material
  • Fig. 1 is an isometric view of the armed device, as it is used in the sampling of ambient air.
  • Figure 2a shows a main view of the armed device of Figure 1.
  • Figure 2b shows a top view of the armed device of Figure 1.
  • Figure 2c shows a bottom view of the armed device of Figure 1.
  • Fig. 3 is a side view of the disassembled device, in which all its parts and pieces can be seen.
  • Fig. 4 is an isometric sectional view of the disassembled device, showing all its parts and pieces.
  • Figs. 5 to 12 correspond to isometric views in section of the device, showing step by step the assembly sequence of the device.
  • the device of the invention consists of a cylindrical container with compartments (cartridge), inside which filters and adsorbents are installed for the collection of organic or inorganic chemical compounds present in the air.
  • the filter collects the compounds associated with the particulate material, and the adsorbent, those present in the gas phase.
  • Figures 1, 2a, 2b and 2c correspond to different views of the armed device, and they show some details of the compartments that compose it. It should be noted that Fig. 2a also shows the correct use position of the invention.
  • the device consists basically of five compartments. From the bottom to the top in Fig. 2a, there are distinguished: inlet head 120, central compartment 210, filter compartment 310, adsorbent compartment 410 and outlet head 510. These parts adjust each other under pressure.
  • Two clips of the head 212 (which are clearly seen in the bottom view of Fig. 2c) hold the input head 110 together with the central compartment 210; two clips 211 hold the central compartment 210 together with the filter compartment 310; and two clips 31 1 (which are clearly seen in the top view of Fig. 2b) hold together the filter compartment 310 with the adsorbent compartment 410.
  • An coupling 520 consisting of a tube with external thread at both ends ( male thread), allows the outlet head 510 to be connected to the adsorbent compartment 410.
  • a collar 440 which hugs adsorbent compartment 410, is installed when the device is to be used in the Partisol® 2300 Sapeciation Sampler equipment of the Thermo company, USA.
  • a nozzle 120 is located at the lower end of the inlet head 110, through which ambient air enters the interior of the device.
  • An o-ring 121 is distinguished on the outer wall of the nozzle, whose function is to ensure a tight seal by means of a cap.
  • Fig. 3 is a side view of the disassembled device, which shows not only the five main compartments, but also the various separation elements contained therein.
  • An impactor 130 is inserted in the input head 110, and its function is to define the maximum particle size that will be collected by the filter 230.
  • a filter 330 is supported with a filter holder 320. Both the filter 330 and the filter holder 320 belong to standard separation elements, and can be purchased from the usual suppliers of laboratory items for chemical analysis.
  • the adsorbents 420 made of polyurethane foam (PUFs), are inserted into the adsorbent compartment 410, and are retained there by a screw cap 430 that fits the thread 41 1, drawn on the outer wall of the lower end of this compartment 410.
  • the function of the adsorbents is to retain the substances present in the gas phase of the air that is passed through the device.
  • PUFs can also be purchased from regular suppliers of laboratory items for chemical analysis.
  • an o-ring 213 contributes to the tightness of the joint between the input head 110 and the central compartment 210
  • another o-ring 214 contributes to the tightness of the joint between the central compartment 210 and the compartment of filters 310.
  • Fig. 4 is an isometric sectional view of the disassembled device, in which details of both the internal structure of the compartments and the structure of the separation elements can be seen.
  • the inlet head 1 10 starts at a nozzle 120, which consists of a Venturi tube.
  • This nozzle together with the impactor 130, defines the maximum size of the particles that will be collected by the filter 330, corresponding to particles with an aerodynamic diameter of 2.5 ⁇ . If the head is designed to measure particles with aerodynamic diameter less than 2.5 ⁇ , then all particles with sizes that exceed this limit are driven directly by the Venturi tube 120 towards the central plate of the impactor 130, where they are retained. The smaller particles continue their way through the device in the direction of the filter 330.
  • the cavity of the inlet head 1 10 is formed from two concentric cylinders of different diameter. The transition between one diameter and another generates an edge (perpendicular to the direction of the flow) in which the impactor 130 rests, as shown in Fig. 5. O-rings 1 11 contribute to the tightness of the connection between the inlet head 110 and the central body 210.
  • the input head 110 and the nozzle 120 were developed by the Harvard University School of Public Health and its operation has been characterized and well documented in numerous scientific publications.
  • the assembly sequence of the device is shown step by step in Figures 5 to 13.
  • the impactor 130 is inserted into the inlet head 110.
  • the impactor 130 rests on the inner edge that is generated by the differences in diameter between the cylindrical cavities of the head 110.
  • the internal diameter of the inlet head 1 10 practically coincides with the external diameter of the lower end of the main body 210.
  • the impactor 130 is fixed in position, because the main body 210 imprisons it against the edge on which it rests.
  • Figures 6 and 7 show the way in which the Teflon 330 filter, of standard dimensions, is installed inside the device.
  • the filter holder 320 (standard), consists of two flat grids that fit into each other, so that the filter 330 is trapped between them.
  • Figure 8 shows that the upper end of the main body 210 (in which the mouth with smaller diameter is located) is inserted tightly into the filter holder 320, so that the latter rests on the first.
  • FIG. 9 The next step is shown in Fig. 9.
  • the upper end of the main body 210, with the filter holder 320 arranged on it, is inserted tightly into the lower mouth of the filter compartment 310.
  • the o-ring 214 and the clips 211 They contribute to the tightness of the joint.
  • Figures 9, 10 and 11 show that the flat bottom of the screw cap 430 is a removable grid 431.
  • Adsorbents (PUFs) 420 are inserted into the adsorbent compartment 410, as shown in Fig. 10.
  • Figures 11 and 12 show how the PUFs 420 are held inside the adsorbent compartment 410.
  • a screw cap 430 is screwed to the wire 411, which has been drawn on the outer walls of the lower end of the adsorbent compartment 410.
  • the lower part of the adsorbent compartment 410 is inserted into the upper mouth of the filter compartment 310.
  • the external diameter of the first practically coincides with the internal diameter of the second.
  • the o-ring 312 and the clips 311 favor the tight connection between the parts.
  • the function of the outlet head 510 is to conduct the remaining air to the vacuum pump that is sucking air, by passing it through a device.
  • the device, and especially the input head 120, are designed to work with flows as low as 10 L / min
  • the clean and prepared device for sampling is wrapped in pre-washed aluminum foil (with organic solvent) and the sample inlet head is covered with its respective lid.
  • the device thus prepared is transported to the sampling site and placed in the sampling equipment called Partisol® 2300 Sequential Speciation Sampler.
  • the sampling time and sequence are programmed in the sampling equipment, according to the purpose of the sampling.
  • the S.Samp. It has 3 different channels, with the ability to install up to 4 devices simultaneously (in parallel), each with its own mass flow regulator. In this way it is possible to program sequences of up to 4 devices in parallel, which can be taken as repetitions of the same sample.
  • the equipment allows you to use the twelve total channels of the S.Samp. individually, programming the equipment in a sequence of 24 continuous hours or 12 hours of sampling, where each device represents 1 hour; or 12 days of sampling, where each device represents 1 day, to name the simplest.
  • the device is removed from the sampling site, it is wrapped again in pre-washed aluminum foil and the sample inlet head is covered with its respective cover. In this way it is transported back to the laboratory, where filters, denuders and PUFs will be processed. Ideally the components where the air sample has been retained (filters, denuders and PUFs) should be processed as quickly as possible, to avoid unnecessary suffering to the collected sample. If it is not feasible to do so immediately, the device wrapped and closed as described should be stored in darkness and refrigeration at less than 4 ° C until the moment of analysis.
  • the filters, denuders and PUFs must at least be stabilized by placing them in their respective and future extraction vessels, with the appropriate organic solvents and with the dosing of the internal standards that will be used for quantification and control Quality of the analytical procedure.
  • these containers should be stored in darkness and refrigeration at less than 4 ° C until the moment of analysis. This ensures the integrity of the sample to be analyzed.
  • Teflon Filters Teflon membrane filters with impacted MP (0.45 ⁇ ⁇ MP ⁇ 2.5 ⁇ ) are carefully removed from the sampling device and placed in a distillation balloon with ultra pure Toluene (Fisher grade Optima), The internal HAP standards necessary for quantitative analysis are added to this solution. Subsequently, the distillation balloon is transferred to a heating blanket where it is connected to a double-jacket cooling system and the adsorbed / absorbed compounds of the MP are removed by boiling (110 ° C) and solvent reflux for one hour. Once this process is finished, the extract obtained is filtered using a new 0.45 ⁇ pore diameter Teflon membrane filter with the support of an oil-free vacuum pump to prevent contamination of the sample. Subsequently the filtered extract is taken to a process of volume reduction and subsequent purification.
  • PUF The polyurethane foam (PUF) filters in which the gas phase of HAPs were collected, are removed from the sampling devices and are placed in a pneumatic, automatic and programmable extraction system called AutoExtract PUF® (patent application of invention CL 588-06).
  • PUFs are immersed in solvents organic using a sweep of solvents of different polarity, all supra pure grade and then programmed electronically to extract the compounds of interest adsorbed in the PUF, through a careful combination of compression and decompression intervals lasting 15 minutes in total.
  • the internal standards of HAPs Prior to the extraction of the PUFs, the internal standards of HAPs are added to the container of the AutoExtact PUF® (apparatus described in patent application CL588-06), directly on the extraction solvent.
  • the extract is collected in a distillation balloon and the equipment is loaded with a new solvent portion, this operation is repeated a certain number of times (with the same PUF) and all solvent fractions are collected in the same ball. Subsequently, the extracts are taken to the common process of volume reduction in rotary evaporator and in nitrogen stream using automatic equipment as described in the patent application for invention CL 590-06. Subsequently, the final extract of the PUF is purified as in the case of extracts obtained from the MP.
  • volume reduction of extracts From this stage, the extracts of Particulate Material and Gas Phase are treated in the same way, but separately.
  • the volume reduction is first performed on a rotary evaporator (30 ° C - 90 rpm) assisted by a Teflon membrane vacuum pump, where samples are evaporated to approximately 1 mL. Subsequently, the extract is transferred to a 5 mL conical vial with a graduated pipette with frosted glass plunger to avoid possible contamination from a propipette. Final washes of the distillation balloon are performed with HPLC grade acetonitrile.
  • Extracts already purified are analyzed by capillary gas chromatography using the internal standard method, using 3 internal PAH standards, for each sample analysis.
  • a Perkin Elmer AutoSystem XL chromatograph equipped with automatic sample injection system with refrigerated tray, Split / Splitless injector with temperature and pressure ramp and Pre Vent system, a 30 mx 0.25 mm capillary column is used. x 0.25 ⁇ and a flame ionization detector (FID).
  • FID flame ionization detector
  • chromatographic quantification is carried out using the Turbochrom-PE program and a computer application called GC-PLUG® was built, which is a software for chromatographic data processing that hangs from Turbochrom-PE and allows to optimize the qualitative and quantitative chromatographic analysis.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
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  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

La présente invention concerne un dispositif compact et portatif, ainsi qu'un procédé d'utilisation dudit dispositif, permettant le prélèvement d'échantillons représentatifs d'air, avec du matériel à faible débit, afin de déterminer de manière qualitative et quantitative la présence de composés chimiques organiques et inorganiques dans l'air. Le dispositif comprend un contenant composé de compartiments pouvant être assemblés, compact et portatif, réalisé dans un matériau présentant une capacité d'adsorption et d'absorption minimale, dans lequel différentes configurations de filtres et d'adsorbants peuvent être installées en fonction de la situation. Le dispositif comprend une tête de coupe, un corps principal qui est relié à la tête de coupe, un compartiment à filtres, un compartiment à adsorbants avec des filtres en mousse de polyuréthane (PUF) qui est relié au compartiment à filtres, ainsi qu'une tête de sortie qui dirige les gaz résiduels de l'échantillon vers une pompe d'aspiration.
PCT/CL2011/000008 2011-01-26 2011-01-26 Dispositif compact et portatif permettant le prélèvement d'échantillons représentatifs d'air avec du matériel à faible débit afin de déterminer de manière qualitative et quantitative la présence de composés chimiques organiques et inorganiques dans l'air, et procédé d'utilisation dudit dispositif Ceased WO2012100364A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CL2011/000008 WO2012100364A1 (fr) 2011-01-26 2011-01-26 Dispositif compact et portatif permettant le prélèvement d'échantillons représentatifs d'air avec du matériel à faible débit afin de déterminer de manière qualitative et quantitative la présence de composés chimiques organiques et inorganiques dans l'air, et procédé d'utilisation dudit dispositif

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Application Number Priority Date Filing Date Title
PCT/CL2011/000008 WO2012100364A1 (fr) 2011-01-26 2011-01-26 Dispositif compact et portatif permettant le prélèvement d'échantillons représentatifs d'air avec du matériel à faible débit afin de déterminer de manière qualitative et quantitative la présence de composés chimiques organiques et inorganiques dans l'air, et procédé d'utilisation dudit dispositif

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104266872A (zh) * 2014-09-19 2015-01-07 国家烟草质量监督检验中心 带吸附管的转盘型吸烟机捕集装置及其分析测试方法
WO2019161058A1 (fr) 2018-02-16 2019-08-22 Zefon International, Inc. Dispositif amélioré de collecte d'une matière particulaire

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3933431A (en) * 1974-07-23 1976-01-20 The United States Of America As Represented By The United States Energy Research And Development Administration Method and apparatus for sampling atmospheric mercury
US4170901A (en) * 1978-06-15 1979-10-16 The United States Of America As Represented By The Secretary Of The Air Force Sorption tube atmospheric sampling system
WO1994001753A1 (fr) * 1992-07-13 1994-01-20 The Broken Hill Proprietary Company Limited Dispositif d'echantillonnage pour emissions de matieres particulaires ou de vapeurs en suspension dans l'air
US5333511A (en) * 1990-09-07 1994-08-02 The United States Of America As Represented By The United States Environmental Protection Agency Portable controlled air sampler
US5702506A (en) * 1996-10-16 1997-12-30 Institute Of Occupational Safety And Health, Council Of Labor Affairs, Executive Yuan Method and device for aerosol size-selective sampling
US20010045000A1 (en) * 1994-02-02 2001-11-29 Gundel Lara A. Quantitative organic vapor-particle sampler

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3933431A (en) * 1974-07-23 1976-01-20 The United States Of America As Represented By The United States Energy Research And Development Administration Method and apparatus for sampling atmospheric mercury
US4170901A (en) * 1978-06-15 1979-10-16 The United States Of America As Represented By The Secretary Of The Air Force Sorption tube atmospheric sampling system
US5333511A (en) * 1990-09-07 1994-08-02 The United States Of America As Represented By The United States Environmental Protection Agency Portable controlled air sampler
WO1994001753A1 (fr) * 1992-07-13 1994-01-20 The Broken Hill Proprietary Company Limited Dispositif d'echantillonnage pour emissions de matieres particulaires ou de vapeurs en suspension dans l'air
US20010045000A1 (en) * 1994-02-02 2001-11-29 Gundel Lara A. Quantitative organic vapor-particle sampler
US5702506A (en) * 1996-10-16 1997-12-30 Institute Of Occupational Safety And Health, Council Of Labor Affairs, Executive Yuan Method and device for aerosol size-selective sampling

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104266872A (zh) * 2014-09-19 2015-01-07 国家烟草质量监督检验中心 带吸附管的转盘型吸烟机捕集装置及其分析测试方法
WO2019161058A1 (fr) 2018-02-16 2019-08-22 Zefon International, Inc. Dispositif amélioré de collecte d'une matière particulaire
EP3752019A4 (fr) * 2018-02-16 2021-11-17 Zefon International, Inc. Dispositif amélioré de collecte d'une matière particulaire
US11426689B2 (en) 2018-02-16 2022-08-30 Cole-Parmer Instrument Company Llc Device for collecting particulate matter
EP4371642A3 (fr) * 2018-02-16 2024-08-28 Zefon International, Inc. Dispositif amélioré pour collecter des matières particulaires
US12083463B2 (en) 2018-02-16 2024-09-10 Cole-Parmer Instrument Company Llc Device for collecting particulate matter

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