DEVELOPMENT OF A METHOD FOR MULTIELEMENTAL DETERMINATION IN BIODIESEL BY ICP-MS / DESENVOLVIMENTO DE MÉTODO PARA DETERMINAÇÃO MULTIELEMENTAR EM BIODIESEL POR ICP-MS

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

27/04/2011

RESUMO

Biodiesel appeared in this scenario as an alternative short-term, compatible with the current technologies and without the necessity of major modifications. The elements of greatest interest are the residue of catalyst of the production process (Na, K), those limited by environmental regulations (S) and those that act like poisons for the catalyst system of vehicles (Pb, V, P and Hg), but researches aimed to produce analytical methodologies for determinations in Biodiesel, have sought to achieve a multielement mapping of the fuel (Woods ET AL, 2007). Techniques like ICP OES, ICP-MS with reaction cell, FAAS, GFAAS have been usually used in direct or indirect determinations, but still there are combinations of sample preparation and analytical techniques to be studied. This present work sought to evaluate an analyzing system in ICP-MS after a digestion procedure looking for the minimal quantity of organic matter at the final sample. The preliminary results showed that the digestion process, evaluated by the concentration of residual carbon determined by ICP OES, it can be fast and does not require large amounts of energy and oxidizing agent. And still allow, after reducing the nitric matrix, the use of aqueous standards at the calibration curve. It was monitored Ag, Ba, Cu, Mn, Mo, Ni, Ti and Zn in 4 different sources of raw material for biodiesel, and the method was validated by the analysis of two NIST standards by the comparison with ICP OES results and by the recover results ranged between 90 and 110 per cent.

ASSUNTO(S)

icp-ms icp oes icp oes icp-ms biodiesel biodiesel

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