Electrochemical selenium hydride generation with in situ trapping in graphite tube atomizers

0162526 - UIACH-O 20033089 RIV NL eng J - Journal Article
Šíma, Jan - Rychlovský, P.
Electrochemical selenium hydride generation with in situ trapping in graphite tube atomizers.
Spectrochimica Acta Part B: Atomic Spectroscopy. Roč. 58, č. 5 (2003), s. 919-930. ISSN 0584-8547. E-ISSN 1873-3565
R&D Projects: GA ČR GA203/98/0754; GA ČR GA203/01/0453
Institutional research plan: CEZ:AV0Z4031919
Keywords : hydride generation * electrothermal atomic absorption spectrometry * In situ trapping
Subject RIV: CB - Analytical Chemistry, Separation
Impact factor: 2.361, year: 2003

A manifold coupling continuous electrolytic hydride generation of volatile hydrides with atomization in graphite tube atomizers after in situ collection was used for Se(IV) determination. The influence of the experimental parameters on the analytical signal was studied and optimum conditions for selenium determination were found. The results for electrochemical generation of H2Se (cell II) (absolute limit of detection 50 pg, 3 criterion) were compared with the original generation of H2Se using NaBH4 as a reduction agent (absolute limit of detection 30 pg) and with conventional liquid sampling. The repeatability at the 1.0 ng ml-1 level was better than 2.4% (relative standard deviation) for electrochemical hydride generation and better than 2.8% for chemical hydride generation.
Permanent Link: http://hdl.handle.net/11104/0059835