Behavior of thorium,zirconium, and vanadium as chemical modifiers in the determination of arsenic by electrothermal atomization atomic absorption spectrometry |
| |
| Affiliation: | 1. Department of Materials Science and Technology, University of Crete, 710 03 Heraklion, Crete, Greece;2. Department of Physics, University of Crete, 710 03 Heraklion, Crete, Greece;3. Center of Materials Technology and Photonics, School of Applied Technology, Technological Educational Institute of Crete, 710 04 Heraklion, Crete, Greece;4. Electrical Engineering Department, School of Applied Technology, Technological and Educational Institute of Crete, 710 04 Heraklion, Crete, Greece;5. Institute of Electronic Structure and Laser, Foundation for Research & Technology-Hellas, P.O. Box 1527, Vassilika Vouton, 711 10 Heraklion, Crete, Greece;1. Lomonosov Moscow State University, Faculty of Chemistry, Leninskiye Gory 1-3, GSP-1, Moscow 119991, Russia;2. National University of Science and Technology “MISIS”, Leninskiy prospekt 4, Moscow 119049, Russia;3. Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Leninskiy prospekt 31, Moscow 119991, Russia;1. Fisheries College, Ocean University of China, Qingdao, PR China;2. The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, PR China;3. Institute of Biochemistry, Carleton University, 1125 Colonel By Drive, Ottawa, ON K1S 5B6, Canada |
| |
| Abstract: | The comparative effect of thorium, zirconium and vanadium used as chemical modifiers in wall and platform atomization of arsenic using two sample introduction modes (aerosol vs. liquid drop) was studied. The effect of proton concentration (as hydrochloric acid and nitric acid) on the behavior of these modifiers was also tested. A beneficial effect on the stabilization of arsenic from all the chemical modifiers was essentially derived in the presence of nitric acid mainly for the aerosol introduction mode. Nonetheless, the highest sensitivity and the best stabilization of arsenic were obtained using zirconium and thorium as a chemical modifier, because pyrolysis temperatures as high as ∼1500°C can be used. The mechanistic action of the chemical modifiers used is also studied, resulting in the formation of a mixture of oxides stabilized at high temperatures. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
