Instrumental neutron activation analysis and inductively coupled plasma mass spectrometry on atmospheric biomonitors

• Tipo: Artigo em Revista Científica Internacional
• Data: 2007

Autores

freitas, mc (Autor) Outra; pacheco, amg (Autor) Outra; dionisio, i (Autor) Outra; sarmento, s (Autor) Outra; baptista, ms (Autor) Outra; vasconcelos, mtsd (Autor) Outra; cabral, jp (Autor) FCUP

Revista

Título: Journal of Radioanalytical and Nuclear Chemistry

Vol. 273

Páginas: 705-711

ISSN: 0236-5731

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 4 Citações

Scopus - 4 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Química

Outras Informações

ID Authenticus: P-004-7YH

DOI: 10.1007/s10967-007-0934-2

Abstract (EN): In a biomonitoring study aiming to find alternatives to lower epiphytes as air-quality monitors,lichens and tree bark were exposed at different sites for discontinuous periods of 2 months and continuously. Native lichens were collected as well. The contents for 22 elements were obtained by both instrumental neutron activation analysis (INAA) and inductively coupled plasma mass spectrometry (ICP-MS). Quality control as asserted by analyzing ISE-921, NIST-1547 and TL-1 was good Losses of As and Se by volatilization during sample digestion and neutron irradiation were evident, Ca contents by ICP-MS appeared underestimated probably due to the formation of the insoluble fluoride. ICP-MS featured a better precision than INAA. Nonparametric statistics were applied to the ICP-MS replicates, to those determined by INAA, and to compare the results of both techniques. High or even excellent correlations were found between replicates in INAA, whereas, in ICP-MS, Cr and Ta were just fairly or not correlated. As an overall comparison of the techniques, biased results were found for As, Ba, Ce, Cr, Cs, Hf, La, Sc, Se, Ta, and Zn, unbiased results could be found for Ca, Co, Fe, K, Na, Rb, Sb, Sm, Tb, Th, and U.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 7