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Titolo:
Direct determination of mercury in atmospheric particulate matter by graphite plate filtration-electrothermal atomic absorption spectrometry with Zeeman background correction
Autore:
Yu, JC; Zhang, BC; Lai, YK;
Indirizzi:
Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China Chinese Univ Hong Kong Shatin Hong Kong Peoples R China Peoples R China
Titolo Testata:
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
fascicolo: 4, volume: 55, anno: 2000,
pagine: 395 - 402
SICI:
0584-8547(20000428)55:4<395:DDOMIA>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
FLUORESCENCE SPECTROMETRY; AMBIENT AIR; METALS; MODIFIERS; PALLADIUM; FLORIDA; NICKEL; LEAD;
Keywords:
mercury determination; atmospheric particulate matter; electrothermal atomic absorption spectrometry; Zeeman background correction; graphite plate filtration;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Yu, JC Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China Chinese Univ Hong Kong Shatin Hong Kong Peoples R China s R China
Citazione:
J.C. Yu et al., "Direct determination of mercury in atmospheric particulate matter by graphite plate filtration-electrothermal atomic absorption spectrometry with Zeeman background correction", SPECT ACT B, 55(4), 2000, pp. 395-402

Abstract

A new analytical method has been developed for direct analysis of mercury in atmospheric particulate matter by a graphite plate collection technique coupled with Zeeman electrothermal atomic absorption spectrometry (ETAAS). A small porous graphite plate filter was used initially for collecting particulates and subsequently as a platform in ETAAS. A relatively high ashing temperature of 250 degrees C and a low atomization temperature of 900 degrees C could be achieved by using both a PdCl2-coated pyrolytic graphite tubeand a chemical modifier consisting of a 5% (NH4)(2)S solution. Excellent linearity was maintained over the range of 0-5 ng of Hg. When sampling at a flow rate of 350 ml min(-1) for 3 h, this was equivalent to a working concentration range of 0-80 ng m(-3) of particle-bound mercury in air. Analysis of the NIST SRM 1648, Urban Particulate Matter, gave a recovery of 101.4%, and a precision of 9.0% R.S.D. The detection limit was estimated to be 0.74ng m(-3). The accuracy was within +/-8% when compared with the traditionalglass-fiber filtration-acid digestion-cold-vapor atomic absorption spectrometry method. (C) 2000 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 19:11:55