Survey study of mercury determination in detonation nanodiamonds by pyrolysis flameless atomic absorption spectroscopy |
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| Affiliation: | 1. Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester, 601 Elmwood Avenue, Rochester, NY 14642, United States of America;2. Lillehei Heart Institute, University of Minnesota, 2231 6th Street SE, Minneapolis, MN 55455, United States of America;1. Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya Str. 3, Novosibirsk 630090, Russia;2. Novosibirsk State University, Pirogova Str. 2, Novosibirsk 630090, Russia;3. NASA Goddard Institute for Space Studies, 2880 Broadway, New York, NY 10025, USA;1. Institut de Physique de Rennes, CNRS UMR 6251, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France;2. Institut des Sciences Chimiques de Rennes, CNRS UMR 6226 CNRS, Université de Rennes 1, Campus de Beaulieu, 35042 Rennes Cedex, France |
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| Abstract: | A set of 20 commercially available nanodiamond samples of eight manufacturers of various countries, which are most frequently used in basic and applied studies, was analyzed for the concentration of Hg. Conditions of mercury determination by flameless atomic absorption spectroscopy with thermal sample decomposition (pyrolysis) at 800 °C were proposed and confirmed by wavelength-dispersive X-ray fluorescence analysis. It was found that nanodiamonds have a significant diversity of amounts of mercury, from 20 μg/kg to higher than 0.7 g/kg. Thus, the need to control Hg impurity in nanodiamonds, especially for biological and medical research, was demonstrated. The precision of flameless pyrolysis atomic absorption determination of mercury in nanodiamonds is discussed. |
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