ESTUDO DO EFEITO DE MATRIZ NA DETERMINAÇÃO DE METAIS EM ÓLEOS BÁSICOS RERREFINADOS POR FLUORESCÊNCIA DE RAIOS X POR ENERGIA DISPERSIVA
AUTOR(ES)
Melo, Maristela L. S., Souza, Jurandir R. de
FONTE
Quím. Nova
DATA DE PUBLICAÇÃO
2015-06
RESUMO
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.
Documentos Relacionados
- Determinação de arsênio em águas contaminadas usando fluorescência de raios-X por energia dispersiva
- Especiação e determinação de arsenio e selenio em amostras de aguas naturais por fluorescencia de raios X dispersiva em energia
- Determinação de Mn e Zn em arroz empregando espectrometria de fluorescência de raios x de energia dispersiva
- Composição mineral determinado por fluorescência de raios-X dispersiva de energia de frutos exóticos tropicais brasileiros
- Determinação de metais pesados em lodos de esgoto por espectrometria de fluorescencia de raios X
