Detection of fluorine using laser-induced breakdown spectroscopy and Raman spectroscopy
| Autor: | Aleš Hrdlička, Karel Novotný, Jan Novotný, Petr Gadas, Pavlína Modlitbová, Ladislav Čelko, Heikki Häkkänen, Jozef Kaiser, Lucia Sládková, Saara Kaski, Pavel Pořízka, David Prochazka |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Analytical chemistry
chemistry.chemical_element 02 engineering and technology 01 natural sciences Analytical Chemistry Crystal symbols.namesake fluorine Laser-induced breakdown spectroscopy Spectroscopy Detection limit Chemistry 010401 analytical chemistry ta1182 021001 nanoscience & nanotechnology fluori 0104 chemical sciences laser-induced breakdown spectroscopy Halogen Raman spectroscopy symbols Fluorine 0210 nano-technology Quantitative analysis (chemistry) |
| Popis: | In general, the detection of F and other halogens is challenging through conventional techniques. In this paper, various approaches for the qualitative and quantitative analysis of F using the laser-induced breakdown spectroscopy (LIBS) technique were demonstrated. In LIBS, fluorine detection can be realized by means of atomic lines and molecular bands. For the purposes of our experiment, two sets of pellets with various contents of CaF2, CaCO3 and cellulose were analyzed using a lab-based LIBS system under a He atmosphere. The fluorine atomic line at 685.60 nm was correlated with CaF signals proving their close relationship. Consequently, the limits of detection were determined for both analytical signals. Moreover, conditions necessary for the quantification of F via CaF band signals were estimated. The dependence of the CaF signal on the varying ratio of Ca and F contents was investigated. Finally, a chip of a real CaF2 crystal was prepared and its surface was mapped with Raman and LIBS systems. The obtained elemental and molecular maps showed good numerical correlations. Thus, the yielded results validated the possibility to substitute the fluorine atomic line by non-conventional CaF molecular bands in the qualitative and quantitative LIBS analysis of fluorine. peerReviewed |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|