Chemical modification of graphite surfaces for the determination of chromium by electrothermal atomic absorption spectrometry |
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| Institution: | 1. Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea;2. Department of Laboratory Medicine, Chonnam National University Medical School and Chonnam National University Hospital, Gwanju, Korea;3. Department of Orthopedic Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea;1. Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal;2. UCIBIO, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal;3. ISIS Pulsed Neutron and Muon Source, Science and Technology Facilities Council, Harwell Science and Innovation Campus, Didcot OX11 0QX, UK;4. PROTEOMASS Scientific Society, Madan Park, Rua dos Inventores, 2825-152 Caparica, Portugal |
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| Abstract: | Different kinds of graphite surfaces (electrographite, pyrolytic graphite, zirconium and tungsten carbide-coated) have been tested for optimization of analytical conditions for the determination of chromium using electrothermal atomic absorption spectrometry. The effect of mineral acids on the peak absorbance signal of chromium has been investigated. Considering pyrolysis temperature and sensitivity, atomization from pyrolytic graphite coated surface showed the best performance. |
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