High air flow, low pressure drop, bio-aerosol collector using a multi-slit virtual impactor

Bergman, W.; Shinn, R. Lochner J.; Sawyer, Sherilyn; Milanovich, Fred P.; Mariella, Raymond P.

doi:10.1016/j.jaerosci.2004.12.010

Cited by 31 publications

(19 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…While the ASAP unit does not use a liquid impingement format like the other high-volume samples, it is currently being marketed as PCR-compatible. At this time, however, a search of the literature reveals a scarcity of peer-reviewed studies with respect to these or comparable units and their operating efficiencies (Bergman et al 2005). For a comprehensive list of commercially available bioaerosol samplers see Grinshpun et al (2007).…”

Section: High-volume Samplersmentioning

confidence: 99%

Qualitative and quantitative methodologies for determination of airborne microorganisms at concentrated animal-feeding operations

Dungan

Leytem

2009

World J Microbiol Biotechnol

View full text Add to dashboard Cite

The generation of airborne microorganisms from concentrated animal-feeding operations (CAFOs) is a concern from a human and animal health perspective. To better understand the airborne microorganisms found in these environments, a number of collection and analytical techniques have been utilized and will be discussed in this review. The most commonly used bioaerosol collection method is the liquid impingement format, which is suitable with a number of culture-based and non-culture molecularbased approaches, such as polymerase chain reaction. However, the vast majority of airborne microorganism studies conducted at CAFOs utilize culture-based analyses. Because of the limitations often associated with culturebased analyses, we focused our discussion on the application of molecular-based techniques to identify and/or quantify microorganisms, as they have promising application in bioaerosol research. The ability to rapidly characterize airborne microorganisms will help to ensure protection of public and environmental health.

show abstract

Section: High-volume Samplersmentioning

confidence: 99%

Qualitative and quantitative methodologies for determination of airborne microorganisms at concentrated animal-feeding operations

Dungan

Leytem

2009

World J Microbiol Biotechnol

View full text Add to dashboard Cite

show abstract

“…These air jets introduce a significantly large mass flow into the system, all of which must be sampled by the impactor to guarantee all liberated particles are collected. There are several impactors designed to operate at high flow rates that exceed hundreds of liters per minute (Demokritou et al 2002, Misra et al 2002 and even thousands of liters per minute (Burton and Lundgren 1987;Sioutas et al 1997;Bergman et al 2005;Fulghum et al 2013). These impactors, however, are quite large in physical size and usually require powerful blowers to satisfy the flow rate requirements.…”

Section: Design Parameters Of the Basic Impactor Geometrymentioning

confidence: 99%

“…Bergman et al (2005) combined a multislit virtual impactor and a wetted wall cyclone collector for bioaerosol collection. Yoon et al (2010) combined adenosine triphosphate bioluminescence and inertial impaction to analyze bio-aerosols in indoor environments.…”

Section: Introductionmentioning

confidence: 99%

A Streamlined, High-Volume Particle Impactor for Trace Chemical Analysis

Staymates

Bottiger

Schepers

et al. 2013

Aerosol Science and Technology

View full text Add to dashboard Cite

The design and characterization of a streamlined, high-volume particle impactor intended for use with trace chemical analysis is presented. The impactor has a single round jet and is designed to operate at a flow rate of 1000 L/min. Computational fluid dynamics (CFD) was used as a tool to optimize the aerodynamic performance of the impactor by iteratively redesigning the geometry and curvature of the internal walls. By eliminating recirculation zones within the flowfield of the impactor and using flowfield streamlines as new walls, successive designs revealed a significant reduction in the pressure drop across the impactor. Particle trajectories were simulated in the impactor and the 50% cutpoint was determined to be 1.05 µm. The impaction surface itself is easily removed from the body of the impactor assembly, potentially facilitating rapid trace chemical analysis using a variety of chemical detection techniques. A prototype impactor was fabricated with a 3D rapid prototyping printer and characterized in terms of particle cut-off diameter using test aerosols generated by an Ink Jet Aerosol Generator (IJAG) and fluorescence intensity measurements. The experimental particle cut-off diameter was not able to be measured because the smallest aerosol particles that could be tested were 1.86 µm which were collected at 100% efficiency. Particulate contamination from the high-explosive compound C4 was also collected with the impactor to demonstrate operational utility for trace explosives detection.

show abstract

“…For aerosol-to-hydrosol sampling, a wetted wall bioaerosol sampling cyclone was developed with a sampling flow rate of up to 1250 L/min and a continuous liquid outflow rate of about 1 mL/min through upgrading an existing system (King et al 2009;Mcfarland et al 2010). Besides, single-stage and multi-stage virtual impactors were also developed for concentrating biological aerosols (Bergman et al 2005;Park et al 2009). These types of aerosol-to-hydrosol samplers can be adapted to be automated with advanced bioaerosol detection techniques via a micro-fluid channel as illustrated in Figure 1.…”

Section: Bioaerosol Samplingmentioning

confidence: 99%