Arsenic as internal standard to correct for interferences in the determination of antimony by hydride generation in situ trapping graphite furnace atomic absorption spectrometry |
| |
| Affiliation: | 1. Instituto de Química, Universidade Estadual Paulista, PO Box 355, 14801-970 Araraquara-SP, Brazil;2. Departamento de Química, Universidade Federal de São Carlos, PO Box 676, 13560-970, São Carlos-SP, Brazil;3. Instituto de Química, Universidade de São Paulo, PO Box 26077, 05513-970 São Paulo-SP, Brazil;1. Thermal Process Engineering, Otto von Guericke University Magdeburg, Universitätsplatz 2, 39106 Magdeburg, Germany;2. Department of Environmental Engineering, Lodz University of Technology, Wólczańska 213, 90924 Łódź, Poland;1. CEITEC, Masaryk University, Kamenice 5, Brno 625 00, Czech Republic;2. Department of Biochemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno 625 00, Czech Republic;1. University of Helsinki, Department of Forensic Medicine, PO Box 40, FI-00014, University of Helsinki, Finland;2. Finnish Institute for Health and Welfare, Forensic Toxicology Unit, PO Box 30, FI-00271, Helsinki, Finland;1. School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China;2. Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China;3. Chemistry and Chemical Engineering School, Henan University of Technology, Zhengzhou, Henan 450001, China |
| |
| Abstract: | The feasibility of using internal standardization (IS) to correct for interferences in hydride generation with in situ trapping in graphite furnace was evaluated. Arsenic was chosen as internal standard for Sb determination and Ir was used as permanent modifier. Fluctuations in the main parameters that affect the analytical results were minimized by IS and an effective contribution was verified in the studies of liquid phase interferences. Cobalt and Ni2+ were selected to illustrate the potential use of IS on the correction of interference by transition metals. The application of IS allows the Sb determination in samples containing up to 20-fold higher concentration of the Co2+ and Ni2+ when compared to the procedure without IS. The relative standard deviation of measurements varied from 0.3% to 0.7% and from 1.1% to 3.2% with and without IS, respectively. Recoveries within 92% and 107% of spiked aqueous solution containing Sb(III) and Sb(V) were found. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
