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Titolo:
SAMPLING ARTIFACTS IN THE DETERMINATION OF PARTICULATE SULFATE AND SO2(G) IN THE DESERT SOUTHWEST USING FILTER PACK SAMPLERS
Autore:
EATOUGH DJ; LEWIS LJ; EATOUGH M; LEWIS EA;
Indirizzi:
BRIGHAM YOUNG UNIV,DEPT CHEM PROVO UT 84602
Titolo Testata:
Environmental science & technology
fascicolo: 3, volume: 29, anno: 1995,
pagine: 787 - 791
SICI:
0013-936X(1995)29:3<787:SAITDO>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
ANNULAR DENUDER; UNITED-STATES; VISIBILITY; COLLECTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
17
Recensione:
Indirizzi per estratti:
Citazione:
D.J. Eatough et al., "SAMPLING ARTIFACTS IN THE DETERMINATION OF PARTICULATE SULFATE AND SO2(G) IN THE DESERT SOUTHWEST USING FILTER PACK SAMPLERS", Environmental science & technology, 29(3), 1995, pp. 787-791

Abstract

Particles collected in the desert Southwest on Teflon filters using an annular denuder sampling system absorb SO2(g) in a subsequential exposure to SO2(g) in the laboratory if the concentration of fine particulate sulfate measured with a filter pack sampling system is greater than the concentration of sulfate measured with the annular denuder sampling system. If the concentrations of sulfate determined using the twosampling systems agreed, no absorption of SO2(g) by the denuder-collected particles occurs. These results show that SO2(g) may be collectedby Southwest desert fine particles during sampling, resulting in measured concentrations of fine particulate sulfate that are higher than the correct concentrations. The magnitude of this filter pack sampling artifact, 0.1-0.4 mu g SO42-/m(3), is small. However, the artifact is important relative to the concentration of particulate sulfate presentin the desert Southwest, typically 0.5-2 mu g SO42-/m(3). The magnitude of the filter pack sulfate sampling artifact is not related to either the atmospheric particulate sulfate or SO2(g) concentrations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 14:41:54