Vorträge und Posterpräsentationen (mit Tagungsband-Eintrag):
S. Hossein-Zadegan, W. Nischkauer, K. Schröder, A. Limbeck:
"Quantification of rare earth elements retained on natural bio-particles covered with ionic liquid in combination with ETV-ICP-OES";
Poster: European Symposium On Atomic Spectrometry (ESAS2016),
Eger, Hungary;
31.03.2016
- 02.04.2016; in: "Book Of Abstracts",
Hungarian Chemical Society,
(2016),
ISBN: 978-963-9970-65-6;
S. 147.
Kurzfassung englisch:
Rare earth element (REE) are present as impurities in phosphate fertilizers used in agriculture, and might enter the human food-chain, as they are taken up by plants. To analyze REEs in chemically digested plant material, inductively coupled plasma optical emission spectrometry (ICP-OES) is used. However, determination of REEs by ICP-OES needs enrichment prior to analysis due to their low concentration.
In this work, an innovative approach is presented, which is based on preliminary enrichment of REE using dispersed particle extraction (DPE), followed by sensitive measurement by means of electro thermal vaporization (ETV) coupled to ICP-OES. In DPE, adsorbent particles are dispersed in the sample solution, after a reaction time of few minutes the supernatant is separated from the analyte containing sorbent particles. The applied adsorbent is a natural bio particle, Lycopodium clavatum spore, with the size of 30 ± 4 μm and high porosity. This bio particles were covered by an ionic liquid salt [P66614][BEHPA] which acts as the ion exchanger and extracts REE ions from the sample digest.
For element specific analysis, the precipitated particles are transferred into a graphite boat and measured using ETV-ICP-OES, which allows an efficient separation of the organic sorbent matrix and thus a measurement of REE without spectral interferences. Using the inexpensive nature-made particles with easily tunable ionic liquids for analyte-enrichment in combination with ETV-ICP-OES analysis has been found to provide satisfying sensitivity in the analytical context presented here, as well as good reproducibility.
Schlagworte:
ICP-OES, ETV, dispersed particle extraction, ionic liquids, rare earth elements
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.