Characterization of a particle trap impactor

Kim, D.S.; Lee, K.W.; Kim, Y.J.

doi:10.1016/j.jaerosci.2005.09.003

Cited by 9 publications

(4 citation statements)

References 15 publications

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“…In the lowest section of the chamber the aerosol particles and liquid droplets were collected and separated by a custom-made cup impactor [modified from Kim et al (2006)]. The separation is done according to density (see Fig.…”

Section: Methodsmentioning

confidence: 99%

Experimental Study of Collection Efficiencies between Submicron Aerosols and Cloud Droplets

Ladino

Stetzer

Hattendorf

et al. 2011

Journal of the Atmospheric Sciences

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Collection efficiency E experiments for aerosol particles scavenged by cloud droplets were carried out in the newly built Collision Ice Nucleation Chamber (CLINCH). Pure water droplets having radii between 12.8 and 20.0 mm were allowed to fall freely and to collide in a laminar flow with lithium metaborate particles having radii between 0.05 and 0.33 mm. At the bottom of the chamber, the droplets and the particles captured were collected using a cup impactor. The collected solution was analyzed for the scavenged aerosol mass by inductively coupled plasma mass spectrometry. Evaporation of droplets was taken into account since the relative humidity inside the chamber was below 100%, resulting in final theoretical droplet sizes between 4.2 and 17.6 mm. The resulting experimental measurements were compared with theoretical values to see their correlation. The authors found an experimental trend similar to theory, as well as the ''Greenfield gap'' at the particle radius of 0.24 mm (E 5 0.038) for the smallest cloud droplet size investigated in this study. The experimental values of collection efficiency found herein agree with those from theory within one order of magnitude, similar to previous studies reported in the literature.

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Section: Methodsmentioning

confidence: 99%

Experimental Study of Collection Efficiencies between Submicron Aerosols and Cloud Droplets

Ladino

Stetzer

Hattendorf

et al. 2011

Journal of the Atmospheric Sciences

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“…The atomizer (Model 9302, TSI, MN, USA) generated the nanoparticles and these particles were forced to pass through a heating tube where any remaining distilled water was allowed to evaporate completely. The heating tube temperature was maintained at 120-130°C 6) . The generated aerosols were entered into the dilution chamber where the aerosols were mixed with filtered air using HEPA cartridge-type filter (Model 12144, Pall, NY, USA) before passing into the nose-only exposure chamber.…”

Section: Fmnps Generation and Exposurementioning

confidence: 99%

“…The generated aerosols were entered into the dilution chamber where the aerosols were mixed with filtered air using HEPA cartridge-type filter (Model 12144, Pall, NY, USA) before passing into the nose-only exposure chamber. Particle number and size distribution were measured using a scanning mobility particle sizer (SMPS, Grimm Aerosol Technik, Germany) 6,7) . The SMPS, which consists of a differential mobility analyzer (DMA) and a condensation particle counter (CPC), is an instrument for measuring the size distribution of particles in the range from 5 to 1,000 nm.…”

Section: Fmnps Generation and Exposurementioning

confidence: 99%

Body Distribution of Inhaled Fluorescent Magnetic Nanoparticles in the Mice

Kwon¹,

Hwang²,

Jin³

et al. 2008

Journal of Occupational Health

170

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Body Distribution of Inhaled FluorescentMagnetic Nanoparticles in the Mice: Jung-Taek KWON, et al. Laboratory of Toxicology, College of Veterinary Medicine, Seoul National University, Korea-Reducing the particle size of materials is an efficient and reliable tool for improving the bioavailability of a gene or drug delivery system. In fact, nanotechnology helps in overcoming the limitations of size and can change the outlook of the world regarding science. However, a potential harmful effect of nanomaterial on workers manufacturing nanoparticles is expected in the workplace and the lack of information regarding body distribution of inhaled nanoparticles may pose serious problem. In this study, we addressed this question by studying the body distribution of inhaled nanoparticles in mice using approximately 50-nm fluorescent magnetic nanoparticles (FMNPs) as a model of nanoparticles through nose-only exposure chamber system developed by our group. Scanning mobility particle sizer (SMPS) analysis revealed that the mice were exposed to FMNPs with a total particle number of 4.89 × 10 5 ± 2.37 × 10 4 /cm 3 (low concentration) and 9.34 × 10 5 ± 5.11 × 10 4 /cm 3 (high concentration) for 4 wk (4 h/d, 5 d/wk). The body distribution of FMNPs was examined by magnetic resonance imaging (MRI) and Confocal Laser Scanning Microscope (CLSM) analysis. FMNPs were distributed in various organs, including the liver, testis, spleen, lung and brain. T2-weighted spin-echo MR images showed that FMNPs could penetrate the blood-brain-barrier (BBB). Application of nanotechnologies should not produce adverse effects on human health and the Rapid Communicationenvironment. To predict and prevent the potential toxicity of nanomaterials, therefore, extensive studies should be performed under different routes of exposure with different sizes and shapes of nanomaterials. (J Occup Health 2008; 50: 1-6)

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“…and Cheng Y.H., 1995). This design was studied further by other researchers (Chang M. et al, 1999;Kim D.S. et al, 2006;Kim Y.J.…”

Section: Introductionmentioning

confidence: 99%

Inertial Impaction Technique for the Classification of Particulate Matters and Nanoparticles: A Review

Tsai

2021

KONA

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Inertial impactors are applied widely to classify particulate matters (PMs) and nanoparticles (NPs) with desired aerodynamic diameters for further analyses due to their sharp cutoff characteristics, simple design, easy operation, and high collection ability. A few hundred papers have been published since the 1860s that addressed the characteristics and applications of the inertial impactors. In the last 30 years, our group has also carried out lots of studies to contribute to the design and the improvement of inertial impactors. With our understanding of inertial impactors, this article reviews previous studies of some typical types of the inertial impactors including conventional impactors, cascade impactors, and virtual impactors and the parameters for design consideration of these devices. The article also reviews some applications of the inertial impactors, which are mass concentration measurement, mass and number distribution measurement, personal exposure measurement, particulate matter control, and powder classification. The synthesized knowledge of the inertial impactor in this study can help researchers to design an inertial impactor with an accurate cutoff diameter, a sharp collection efficiency curve, and no particle bounce and particle overloading effects for long-term use for PM classification and control purposes.

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Characterization of a particle trap impactor

Cited by 9 publications

References 15 publications

Experimental Study of Collection Efficiencies between Submicron Aerosols and Cloud Droplets

Experimental Study of Collection Efficiencies between Submicron Aerosols and Cloud Droplets

Body Distribution of Inhaled Fluorescent Magnetic Nanoparticles in the Mice

Inertial Impaction Technique for the Classification of Particulate Matters and Nanoparticles: A Review

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