Journal
QUIMICA NOVA
Volume 31, Issue 7, Pages 1626-1630Publisher
SOC BRASILEIRA QUIMICA
DOI: 10.1590/S0100-40422008000700005
Keywords
filter furnace atomic absorption spectrometry; fuel ethanol; cadmium
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Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq, Brazil)
- FAPERJ
- FINEP
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A method was developed for quantification of Cd and Pb in ethanol fuel by filter furnace atomic absorption spectrometry. Filter furnace was used to eliminate the need for chemical modification, to stabilize volatile analytes and to allow the application of short pyrolysis step. The determinations in samples were carried out against calibration solutions prepared in ethanol. Recovery tests were made in seven commercial ethanol fuel samples with values between 90 and 120%. Limits of detection were 0.1 mu g L-1 for Cd and 0.3 mu g L-1 for Pb. Certified water samples (APS 1071, APS 1033, NIST 1643d, NIST 1640) were also used to evaluate accuracy and recoveries from 86.8% to115% were obtained.
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