GA203/98/0754 GA ČR - Czech Science Foundation (CSF)
GA203/01/0453 GA ČR - Czech Science Foundation (CSF)
CEZ
AV0Z4031919 - UIACH-O
Annotation
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.
