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Titolo:
PERMANENT IRIDIUM MODIFIER FOR ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRY
Autore:
RADEMEYER CJ; RADZIUK B; ROMANOVA N; SKAUGSET NP; SKOGSTAD A; THOMASSEN Y;
Indirizzi:
UNIV PRETORIA,DEPT CHEM PRETORIA SOUTH AFRICA BODENSEEWERK PERKIN ELMER & CO GMBH D-88662 UBERLINGEN GERMANY NATL INST OCCUPAT HLTH N-0033 OSLO NORWAY
Titolo Testata:
Journal of analytical atomic spectrometry
fascicolo: 10, volume: 10, anno: 1995,
pagine: 739 - 745
SICI:
0267-9477(1995)10:10<739:PIMFEA>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
COATED GRAPHITE TUBE; CHEMICAL MODIFICATION; INSITU CONCENTRATION; FURNACE; PALLADIUM; MERCURY; GENERATION; ELEMENTS; VAPOR;
Keywords:
ELECTROTHERMAL ATOMIC ABSORPTION SPECTROMETRY; PERMANENT MODIFIER; IRIDIUM; DEPOSITION BY SPUTTERING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
17
Recensione:
Indirizzi per estratti:
Citazione:
C.J. Rademeyer et al., "PERMANENT IRIDIUM MODIFIER FOR ELECTROTHERMAL ATOMIC-ABSORPTION SPECTROMETRY", Journal of analytical atomic spectrometry, 10(10), 1995, pp. 739-745

Abstract

The suitability for chemical modification of a pure metal layer, deposited on the inner surface of a graphite tube by cathodic sputtering of Ir in a low pressure Ar discharge, was investigated. The characteristics of the deposited layer were studied using scanning electron microscopy and compared with those of Ir deposited from solution. The analytical performance of the modifier was assessed in the determination ofCd, Mn, Pb, Se and V. When sufficient Ir was deposited by sputtering,a homogeneous layer covering the entire tube surface was formed whichchanged only slightly during the entire lifetime of the graphite tube. Thus integrated absorbance remained essentially constant for more than 700 atomizations. The volatile elements Cd, Pb and Se were thermally stabilized in the absence of a matrix to 800, 1200 and 1400 degrees C, respectively. The rate of atomization for Mn and V was, however, unfavourably delayed in the Ir-coated tubes.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/11/20 alle ore 22:39:32