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A solid solution theory for matrix modification in electrothermal atomic absorption spectrometry
Affiliation:1. Faculty of Chemistry, University of Sofia, 1 J. Bourchier Blvd., 1126 Sofia, Bulgaria;2. Laboratory of Analytical Chemistry, School of Chemistry, Aristotle University of Thessaloniki, 540.06 Thessaloniki, Greece;1. Chronobiology Division, Faculty of Health and Medical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, UK;2. Department of Medicine, University of Chicago, Chicago, IL 60637, USA;3. Incor, University of São Paulo School of Medicine, São Paulo, SP 05403-900, Brazil;1. Department of Chemistry, The Gifted Students'' School in Najaf, Ministry of Education, 54001, Iraq;2. Department of Dairy Science and Technology, College of Food Sciences, Al-Qasim Green University, 51013, Iraq;3. Radoilogical Technology Department, College of Medical Technology, The Islamic University, Najaf, Iraq;4. Department of Analytical and Toxicological Chemistry, Odesa I.I. Mechnikov National University, Odesa, 65082, Ukraine;1. Department of Radiation Oncology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Cancer Hospital affiliate to School of Medicine, University of Electronic Science and Technology of China, Radiation Oncology Key Laboratory of Sichuan Province, Chengdu, China;2. School of Medicine, University of Electronic Science and Technology of China, Chengdu, China;3. Department of Radiology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, Cancer Hospital affiliate to School of Medicine, University of Electronic Science and Technology of China, Chengdu, China;1. Department of Analytical Chemistry, Institute of Chemistry, Faculty of Science, P. J. Šafárik University, Košice, Slovakia;2. Department of Analytical Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, SK-842 15 Bratislava, Slovakia;3. Department of Analytical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, 80-233 Gdańsk, Poland;4. BioTechMed Center, Gdańsk University of Technology, 80-233 Gdańsk, Poland;1. Departamento de Química, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil;2. Programa de Pós-Graduação em Sistemas e Processos Industriais, Universidade de Santa Cruz do Sul, 96815-900 Santa Cruz do Sul, RS, Brazil
Abstract:The kinetics of evaporation of the volatile analytes Pb and Cd in the presence of Ce(IV) introduced as the chemical modifier (NH4)2Ce(NO3)6 have been studied. The experimental results obtained are found to be in acceptable agreement with the regular solution model applied as a theoretical approach. Comparison with the results from previous investigation on the Pb/W analyte-modifier couple is made. An attempt is also made to explain some effects connected with the application of modifiers as described in the literature within the framework of the present model.
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