Multielement analysis of lichen samples using XRF methods. Comparison with ICP‐AES and FAAS |
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| Authors: | Zahily Herrero Fernández Juan Reinaldo Estevez Álvarez Alfredo Montero Álvarez Iván Pupo González José Araújo dos Santos Júnior Marvic Ortueta Milan Guillermo Mesa Pérez Dennys Leyva Bombuse Maydel Rodríguez González Débora Hernández Torres Nancy Alberro Macias Nelis Blanco Hernández Román Padilla Álvarez |
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| Affiliation: | 1. Centre for Technological Applications and Nuclear Development (CEADEN), Playa, Havana, Cuba;2. Department of Nuclear Energy (UFPE/DEN), Federal University of Pernambuco, Cidade Universitaria, Recife, Brazil;3. Institute of Ecology and Systematic (IES), Boyeros, Havana, Cuba;4. On leave to International Atomic Energy Agency (IAEA), Vienna, Austria |
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| Abstract: | This research presents the contents of Ca, Fe, Zn, Br, Rb, Sr and Pb in lichen samples used as biomonitors of air pollution collected in Havana. Statistical comparisons were made among the results obtained in three campaigns during three years. Two X‐Ray Fluorescence (XRF) methods were used, employing for excitation an annular 109Cd source and a Mo X‐ray tube with a molybdenum secondary target. In both cases, matrix effects were corrected by the use of normalization for the Compton scattered peak; in this way the determination is more efficient. For quality control of the results, biological Certified Reference Materials were analyzed and were made comparisons between XRF, Inductively Coupled Plasma‐Atomic Emission Spectrometry and Flame Atomic Absorption Spectrophotometry. No significant differences were found between the different techniques. The elemental distribution patterns obtained for each metal were associated with different pollution sources, thus contributing to the assessment of air pollution in Havana. Copyright © 2015 John Wiley & Sons, Ltd. |
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