In situ trapping of stibine in externally heated quartz tube atomizers for atomic absorption spectrometry |
| |
| Institution: | 1. Chemistry Institute, State University of Campinas, 13083-970, Campinas, SP, Brazil;2. Chemistry Department, Federal University of São Carlos, 13565-905, São Carlos, SP, Brazil;1. Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, China;2. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China;4. Faculty of Science, University of Toyama, Toyama 930-8555, Japan;5. Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China |
| |
| Abstract: | An evaluation of an extremely simple method for antimony preconcentration based on the novel experimental approach, in situ trapping of stibine in externally heated quartz tube atomizers, is presented. The only difference to the set-up employed for the conventional operation mode is that a flow of oxygen (at stoichiometric excess over hydrogen) is introduced just upstream of the atomizer in the trapping step of the procedure. The volatilization of the trapped analyte can be performed just by switching off the oxygen inlet. The collection/volatilization efficiency (± S.D.) is 100 ± 2%. For the collection time of 300 s (sample volume of 20 ml), the preconcentration ratio and detection limit (3σ), respectively, is 400 and 2.8 pg ml− 1. A possible way of further improvement of the detection limit is suggested. The same approach can be analytically useful also for bismuthine (efficiency 55 ± 2%) but not for arsine, selenium hydride and tellurium hydride. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
