Atomic fluorescence spectrometry with volatile species generation – a sensitive tool for ultratrace elemental analysis

0582993 - ÚIACH 2025 CZ eng D - Dizertace
Štádlerová, Barbora
Atomic fluorescence spectrometry with volatile species generation – a sensitive tool for ultratrace elemental analysis.
Ústav analytické chemie AV ČR, v. v. i. Obhájeno: Praha. 16.2.2024. - Praha: Univerzita Karlova, 2024. 80 s.
Grant CEP: GA ČR GA17-04329S; GA ČR(CZ) GJ19-17604Y; GA ČR(CZ) GA23-06530S
Institucionální podpora: RVO:68081715
Klíčová slova: atomization of volatile species * atomic fluorescence spectrometry * atomic fluorescence spectrometer
Obor OECD: Analytical chemistry

This thesis encompasses a development of innovative methodologies based on atomic fluorescence spectrometry, offering precise and sensitive determination of ultratrace elements, such as bismuth, cadmium, and nickel. The common denominator of all parts of this work is the use of a researchgrade nondispersive atomic fluorescence spectrometer (AFS). First part of this work is dedicated to the development of a highly sensitive methodology for bismuth determination based on hydride generation (HG) coupled with AFS. Bismuthane was generated by the reaction with NaBH4 in HCl medium in a flow injection arrangement and directed by a stream of carrier argon and hydrogen to an atomizer. A detailed optimization of the optical path of the spectrometer (electrodeless discharge lamp, lenses and interference filter) and atomization parameters in two flame atomizers – miniature diffusion flame (MDF) and flameingasshield atomizer (FIGS) – was performed. An excellent repeatability and extremely low limits of detection were achieved, namely 1.8 ng L−1 with the MDF and 0.9 ng L−1 with the FIGS.
Trvalý link: https://hdl.handle.net/11104/0351019