Multielement analysis of lichen samples using XRF methods. Comparison with ICP-AES and FAAS

作者：Herrero Fernandez Zahily; Estevez Alvarez Juan Reinaldo; Montero Alvarez Alfredo; Pupo Gonzalez Ivan; dos Santos Junior Jose Araujo; Ortueta Milan Marvic; Mesa Perez Guillermo; Leyva Bombuse Dennys; Rodriguez Gonzalez Maydel; Hernandez Torres Debora; Macias Nancy Alberro; Blanco Hernandez Nelis; Padilla Alvarez Roman

来源：X-Ray Spectrometry, 2016, 45(2): 77-84.

DOI：10.1002/xrs.2657

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 Cd-109 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.

• 出版日期2016-4