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Titolo:
A MULTIPLE-SYSTEM, MULTICHANNEL DIFFUSION DENUDER SAMPLER FOR THE DETERMINATION OF FINE-PARTICULATE ORGANIC MATERIAL IN THE ATMOSPHERE
Autore:
EATOUGH DJ; WADSWORTH A; EATOUGH DA; CRAWFORD JW; HANSEN LD; LEWIS EA;
Indirizzi:
BRIGHAM YOUNG UNIV,DEPT CHEM PROVO UT 84602
Titolo Testata:
Atmospheric environment. Part A, General topics
fascicolo: 8, volume: 27, anno: 1993,
pagine: 1213 - 1219
SICI:
0960-1686(1993)27:8<1213:AMMDDS>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
PARTICLES;
Keywords:
PARTICULATE ORGANIC COMPOUNDS; SEMIVOLATILE; DIFFUSION DENUDER; CANYONLANDS; ARTIFACTS; CHARCOAL ADSORBENT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
D.J. Eatough et al., "A MULTIPLE-SYSTEM, MULTICHANNEL DIFFUSION DENUDER SAMPLER FOR THE DETERMINATION OF FINE-PARTICULATE ORGANIC MATERIAL IN THE ATMOSPHERE", Atmospheric environment. Part A, General topics, 27(8), 1993, pp. 1213-1219

Abstract

Measurement of the loss of semi-volatile organic compounds from particles collected with a filter is carried out by comparing the amounts collected by comparable filter pack and diffusion denuder samplers. Thesorbents used to collect organic compounds in the denuder and sorbentfilters must have the same efficiency for collection of all gas-phaseorganic compounds present. Interpretation of the data requires that the efficiency of collection of gas-phase compounds by the denuder be known. In theory this can be accomplished by determination of the deposition pattern of all organic compounds collected in the denuder, but in practice this is very difficult if the organic material consists of a wide variety of compounds. An alternative approach is to determine the breakthrough of organic compounds in a sampler with a particle-collection filter preceding the denuder and sorbent filter. In such a sampler only ps-phase organic material enters the denuder. We have developed both a multi-channel parallel plate diffusion denuder sampler and acomparable sampler in which the denuder is preceded by a filter. Samples can be collected with the multi-system sampler at a flow rate of 35 sLpm. The denuder surfaces and the sorbent filters are made from sheets of an activated charcoal-impregnated filter paper. Collection of semi-volatile compounds by the samplers has been characterized and the systems have been field tested. The samplers are now being used for the routine collection and determination of semi-volatile organic compounds in particles at Canyonlands National Park in southeastern Utah. Available data from this field program show significant losses of particulate organic compounds on a quartz filter due to volatilization during sampling.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 07:39:32