Simultaneous determination of Se and As by hydride generation atomic absorption spectrometry with analyte concentration in a graphite furnace coated with zirconium |
| |
| Institution: | 1. Safety Promotion and Injury Prevention Research Center, Department of Occupational Health, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran;2. Student Research Committee, Department of Occupational Health, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran;3. Department of Occupational Health, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran;4. Department of Occupational Health, School of Public Health, Guilan University of Medical Sciences, Rasht, Iran;1. Environmental Geochemistry, Bayreuth Center for Ecology and Environmental Research (BayCEER), University of Bayreuth, Universitaetsstrasse 30, 95440 Bayreuth, Germany;2. Chemische Analytik, Bayreuth Center for Ecology and Environmental Research (BayCEER), University of Bayreuth, Dr.-Hans-Frisch Strasse 1-3, D-95448 Bayreuth, Germany;1. State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, PR China;2. Department of Chemistry and the MOE Key Lab of Spectrochemical Analysis & Instrumentation, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, PR China;3. College of the Environment and Ecology, Xiamen University, Xiamen, PR China |
| |
| Abstract: | Conditions for the simultaneous determination of selenium and arsenic at ng l−1 level were developed. Simultaneous determination of these elements was possible through the multielement capabilities of hydride generation, with in situ trapping and atomization in a graphite tube coated with zirconium and measurements using a dual channel atomic absorption spectrophotometer. The zirconium coating employed in this work was relatively stable; once formed it could stand ≈80 firings without any significant change in the efficiency of hydride collection. This appears to be an advantage over the palladium coating, which is usually formed individually before each measurement because of its thermal instability during the atomization step of the furnace temperature programme. As a result, two determinations of the two elements could be performed in 2.5 min. Under the optimized conditions, concentration detection limits of 17 and 13 ng l−1 for a 7.1 ml sample volume were obtained for selenium and arsenic, respectively (absolute detection limits 120 and 92 pg for Se and As). |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
