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The possibility of standardless analysis in graphite furnace atomic absorption spectrometry: determination of gold in geological samples
Affiliation:1. Birbal Sahni Institute of Palaeosciences, Lucknow 226007, Uttar Pradesh, India;2. Department of Earth Sciences, Sambalpur University, Sambalpur 768019, Odisha, India;1. Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Ministry of Education, Nanjing, 210023, China;2. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, 210023, China;3. Institut für Umweltphysik, Heidelberg University, Neuenheimer Feld 229, Heidelberg, 69120, Germany;4. High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, Taipei, 10617, Taiwan;1. Department of Geosciences, Eberhard Karls Universität Tübingen, 72074 Tübingen, Germany;2. Sedimentology and Environmental Geology, Geoscience Center, University of Göttingen, 37077 Göttingen, Germany;3. Department of Earth Sciences, Dalhousie University, Halifax, NS, B3H 4J1 Canada;4. Institute of Earth and Environmental Sciences, University of Potsdam, 14476 Potsdam, Germany;1. Department of Geology and Natural Resources, Institute of Geosciences, PO Box 6152, University of Campinas – UNICAMP, 13083-970 Campinas, SP, Brazil;2. Instituto de Energías Renovables, Universidad Nacional Autónoma de México, Privada Xochicalco s/n, Col. Centro, Temixco, Mor. 62580, Mexico;3. Department of Geology, Bundelkhand University, Jhansi, India;1. Institute of Geology, University of Innsbruck, Innrain 52, A-6020 Innsbruck, Austria;2. Department of Human Evolution, Max Planck Institute for Evolutionary Anthropology, D-04103 Leipzig, Germany;3. Institute of Earth and Environmental Sciences - Geology, Albert-Ludwigs-Universität Freiburg, D-79098 Freiburg, Germany
Abstract:This paper investigates the possibility of standardless analysis for gold in geological samples using graphite furnace atomic absorption spectrometry. A simplex optimization method is employed to select the optimum experimental conditions for both the conventional and fast furnace programs. The atomization efficiency (εA = 100 × m0(calc)/m0(exp)) for gold appears to be temperature dependent and is found to be around at 100% at higher atomization temperature. The results show that the standardless determination of gold could be performed in geological samples with the use of palladium as the matrix modifier and the accuracy is better than 7%.
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