Title:	Estudo do efeito de matriz na determinação de metais em óleos básicos rerrefinados por fluorescência de raios X por energia dispersiva
Other Titles:	Study of matrix effect in determination of metals in re-refined basic oils by energy dispersive X-ray fluorescence - edx
Authors:	Melo, Maristela Lopes Silva Souza, Jurandir Rodrigues de
Assunto::	Óleos e gorduras Fluorescência Metais
Issue Date:	Jun-2015
Publisher:	Sociedade Brasileira de Química
Citation:	MELO, Maristela Lopes Silva; SOUZA, Jurandir Rodrigues de. Estudo do efeito de matriz na determinação de metais em óleos básicos rerrefinados por fluorescência de raios X por energia dispersiva. Química Nova, São Paulo, v. 38, n. 5, p. 614-621, jun. 2015. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000500614&lng=en&nrm=iso>. Acesso em: 8 maio 2018. doi: http://dx.doi.org/10.5935/0100-4042.20150047.
Abstract:	In this article, the results of the study of the matrix effect in the determination of metals calcium, chromium, iron, nickel, copper, zinc, molybdenum, cadmium, barium and lead in base oil using Energy Dispersive X-Ray Fluorescence (EDX) are presented. Sensitivities obtained for each calibration curve were evaluated where calcium, chromium, copper, cadmium, barium and lead had the lowest sensitivities. In the case of cadmium, this parameter was lagging and the studies were not carried forward. The curves of the other metals in different base oils were evaluated for linearity. The elements chromium, copper, molybdenum and lead showed linearity problems in some cases. Therefore, curves in different base oils showed distinct mathematical behavior where the matrix effect was confirmed. The other curves were evaluated and existence of the matrix effect attributed to interference of C / H ratio was confirmed in the quantification of all elements. Metals iron, nickel and zinc exhibited the highest sensitivity and determination coefficients, showing that the method has application potential.
metadata.dc.description.unidade:	Instituto de Química (IQ)
Licença::	Química Nova - Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution NonCommercial, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que sem fins comerciais e que o trabalho original seja corretamente citado (CC BY NC 4.0). Fonte: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422015000500614&lng=en&nrm=iso. Acesso em: 8 maio 2018.
DOI:	http://dx.doi.org/10.5935/0100-4042.20150047
Appears in Collections:	Artigos publicados em periódicos e afins

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