Photochemical vapor generation - A novel method for ultratrace analysis of transition metals

0542853 - ÚIACH 2022 CZ eng A - Abstrakt
Vyhnanovský, Jaromír - Hašlová, K. - Šoukal, Jakub - Musil, Stanislav
Photochemical vapor generation - A novel method for ultratrace analysis of transition metals.
Czech Chemical Society Symposium Series. Roč. 19, Amerika 20th (2021), s. 45-45. ISSN 2336-7202.
[Interdisciplinary Meeting of Young Researchers and Students in the Field of Chemistry, Biochemistry, Molecular Biology, and Biomaterials /20./. 17.05.2021-20.05.2021, Milovy, On-line Meeting]
Grant CEP: GA ČR(CZ) GJ19-17604Y
Institucionální podpora: RVO:68081715
Klíčová slova: photochemical vapor generation * inductively coupled plasma mass spectrometry * transition metals
Obor OECD: Analytical chemistry

This presentation will focus on the novel PVG of Mo, W, Re and Ru that was achieved for the first time. Efficient PVG was accomplished in a flow-through photoreactor using formic acid-based reaction media. Generated volatile products (metal carbonyls) were directed by an argon carrier gas to a gas-liquid separator and introduced into an inductively coupled plasma mass spectrometer for detection. Details on optimization of generation conditions and influence of various metal sensitizers (additives) will be presented. Particular attention will be paid to the determination of PVG efficiency, which is the parameter that describes the best overall yield of PVG and is directly reflected in achieved sensitivity. The accuracy and feasibility of this sensitive methodology (limits of detection in pg ml–1) will be demonstrated by the results from analyses of
Certified Reference Materials and real samples covering a variety of sample matrices. Mechanistic aspects of PVG of these transition metals will be also pointed out and discussed.
Trvalý link: http://hdl.handle.net/11104/0320194