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In situ trapping of hydride forming elements within miniature electrothermal devices useful for atomic spectrometry methods
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SYSNO ASEP 0162481 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title In situ trapping of hydride forming elements within miniature electrothermal devices useful for atomic spectrometry methods Author(s) Dočekal, Bohumil (UIACH-O) RID, ORCID Source Title Colloquium Spectroscopicum Internationale XXXIII / Fernández J. M. C. ; Pérez J. M. V.. - Granada : Universidad de Granada, 2003 - ISBN 84-338-3017-1 Pages s. 156 Number of pages 1 s. Action Colloquium Spectroscopicum Internationale /33./ Event date 07.09.2003-12.09.2003 VEvent location Granada Country ES - Spain Event type WRD Language eng - English Country ES - Spain Keywords hydride generation ; miniature collection devices ; atomic spectrometry Subject RIV CB - Analytical Chemistry, Separation R&D Projects GA203/01/0453 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z4031919 - UIACH-O Annotation Prototypes of miniature devices for in situ collection of hydride forming elements were designed, based on electrothermal vaporizers equipped with bare and modified graphite materials and refractory metals (molybdenum, tungsten). Optimization of trapping efficiency of analytes (As, Sb, Se) with respect to the geometry of the vaporizer, the type of material used and its treatment by various modifiers (noble metals ů Au, Ir, Pt, Rh), to the influence of the composition of carrier and stripping gases and related gas flow rates, to analytical figures of merit and the analytical lifetime of the vaporizers was investigated. Possible basic processes of trapping and related inter-element interference effects were also studied. In addition to results of atomic absorption spectrometric measurement, data of complementary radiotracer and radiography experiments were also obtained in order to provide information about the net trapping efficiency and spatial distribution of analytes in the trap. Workplace Institute of Analytical Chemistry Contact Iveta Drobníková, drobnikova@iach.cz, Tel.: 532 290 234 Year of Publishing 2004
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