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Titolo:
Determination of PM2.5 sulfate and nitrate with a PC-BOSS designed for routine sampling for semi-volatile particulate matter
Autore:
Eatough, DJ; Pang, YB; Eatough, NL;
Indirizzi:
Brigham Young Univ, Dept Chem & Biochem, Provo, UT 84602 USA Brigham YoungUniv Provo UT USA 84602 Chem & Biochem, Provo, UT 84602 USA Calif Polytech State Univ San Luis Obispo, Dept Chem, San Luis Obispo, CA 93407 USA Calif Polytech State Univ San Luis Obispo San Luis Obispo CA USA93407 SA
Titolo Testata:
JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
, volume: 49, anno: 1999,
pagine: 69 - 75
SICI:
1096-2247(199909)49:<69:DOPSAN>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOS-ANGELES BASIN; ORGANIC MATERIAL; ANNULAR DENUDER; CHEMICAL-COMPOSITION; RELATIVE-HUMIDITY; SIZE DISTRIBUTION; FINE PARTICLES; SYSTEM; AEROSOL; ATMOSPHERE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Engineering, Computing & Technology
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Eatough, DJ Brigham Young Univ, Dept Chem & Biochem, Provo, UT 84602 USA Brigham Young Univ Provo UT USA 84602 em, Provo, UT 84602 USA
Citazione:
D.J. Eatough et al., "Determination of PM2.5 sulfate and nitrate with a PC-BOSS designed for routine sampling for semi-volatile particulate matter", J AIR WASTE, 49, 1999, pp. 69-75

Abstract

Ambient particles contain substantial quantities of material that can be lost from the particles during sample collection on a filter. These include ammonium nitrate and semi-volatile organic compounds. As a result, the concentrations of these species are often significantly in error for results obtained with a filter pack sampler. The accurate measurement of these semi-volatile fine particulate species is essential for a complete understanding of the possible causes of health effects associated with exposure to fine particles. Past organic compound diffusion denuder samplers developed by theauthors (e.g., the Brigham Young University Organic Sampling System [BOSS]) are not amenable to routine field use because of the need to independently determine the gas-phase semivolatile organic material efficiency of the denuder for each sample. This problem has been eliminated using a combined virtual impactor, particle-concentrator inlet to provide a concentrated stream of 0.1-2.5-mu m particles. This is followed by a BOSS diffusion denuder and filter packs to collect particles, including any semi-volatile species lost from the particles during sampling. The sampler (Particle Concentrator-Brigham Young University Organic Sampling System [PC-BOSS]) contains a post-denuder multifilter pack unit to allow for the routine collection of several sequential samples. The PC-BOSS can be used for the determination of both fine particulate nitrate and semi-volatile organic material without significant "positive" or "negative" sampling artifacts. Validation of the sampler for the determination of PM2.5 sulfate and nitrate based on comparison of results obtained at Riverside, CA with collocated PC-BOSS, annular denuder, and ChemSpec samplers indicates the PC-BOSS gives accurate results for these species with a precision of +/-5-8%. An average of 33% of the PM2.5 nitrate was lost from the particles during sampling for both denuder and single filter samplers.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 06:30:28