Evaluation of a Diffusion Charger for Measuring Aerosols in a Workplace.
The model DC2000CE diffusion charger from EcoChem Analytics (League City, TX, USA) has the potential to be of considerable use to measure airborne surface area concentrations of nanoparticles in the workplace. The detection efficiency of the DC2000CE to reference instruments was determined with mono...
| Publicado en: | Annals of Occupational Hygiene Vol. 58; no. 4; pp. 424 - 437 |
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| Autores principales: | , , |
| Formato: | equations & formulas research tables/charts Journal Article |
| Publicado: |
Oxford University Press / USA
May2014
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=95480166&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 95480166 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00034878 JQ4 jtl: Annals of Occupational Hygiene issn: 00034878 maglogo: N pubinfo: dt: May2014 vid: 58 iid: 4 pid: 622 pub: Oxford University Press / USA artinfo: ui: 95480166 104064837 104064837 10.1093/annhyg/met082 95480166 ppf: 424 ppct: 13 formats: fmt: @attributes: type: P tig: atl: Evaluation of a Diffusion Charger for Measuring Aerosols in a Workplace. aug: au: Vosburgh, Donna J. H. Ku, Bon Ki Peters, Thomas M. affil: 1. Department of Occupational and Environmental Safety and Health, University of Wisconsin-Whitewater, 800 West Main Street, Whitewater, WI 53190 , USA sug: subj: Environmental Monitoring Methods Aerosols Analysis Occupational Exposure Nanoparticles Environmental Monitoring Equipment and Supplies Particle Size Occupational Safety Funding Source Spearman's Rank Correlation Coefficient Air Pollution Analysis ab: The model DC2000CE diffusion charger from EcoChem Analytics (League City, TX, USA) has the potential to be of considerable use to measure airborne surface area concentrations of nanoparticles in the workplace. The detection efficiency of the DC2000CE to reference instruments was determined with monodispersed spherical particles from 54 to 565.7nm. Surface area concentrations measured by a DC2000CE were then compared to measured and detection efficiency adjusted reference surface area concentrations for polydispersed aerosols (propylene torch exhaust, incense, diesel exhaust, and Arizona road dust) over a range of particle sizes that may be encountered in a workplace. The ratio of surface area concentrations measured by the DC2000CE to that measured with the reference instruments for unimodal and multimodal aerosols ranged from 0.02 to 0.52. The ratios for detection efficiency adjusted unimodal and multimodal surface area concentrations were closer to unity (0.93–1.19) for aerosols where the majority of the surface area was within the size range of particles used to create the correction. A detection efficiency that includes the entire size range of the DC2000CE is needed before a calibration correction for the DC2000CE can be created. For diesel exhaust, the DC2000CE retained a linear response compared to reference instruments up to 2500mm2 m−3, which was greater than the maximum range stated by the manufacturer (1000mm2 m−3). Physical limitations with regard to DC2000CE orientation, movement, and vibration were identified. Vibrating the DC2000CE while measuring aerosol concentrations may cause an increase of ~35mm2 m−3, whereas moving the DC2000CE may cause concentrations to be inflated by as much as 400mm2 m−3. Depending on the concentration of the aerosol of interest being measured, moving or vibrating a DC2000CE while measuring the aerosol should be avoided. pubtype: Academic Journal doctype: equations & formulas research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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