Energy dispersive X-ray fluorescence applied to mapping of tree stems in Campinas, São Paulo

[摘要] Dendrochemistry is based on the determination of elements retained in tree rings, which can be useful to characterize environmental occurrences. This work shows elemental mappings obtained by EDXRF of the cross section of a tree stem. The tree is originated from a polluted area in Campinas, São Paulo. Some profiles, as the sulfur one, show variations that can be attributed to external contributions, whereas the silicon one can be inferred to a protection defense natural mechanism. Besides being simultaneous and multielementar, the main advantages here are its performance through a non-destructive sample treatment and the ease of operation of XRF equipments.

[学科分类] 化学（综合）

[关键词] tree rings;dendrochemical mapping;X-ray fluorescence.