NDLI: Determination of Calcium and Magnesium in Biodiesel by Flame Atomic Absorption Spectrometry Using Microemulsions as Sample Preparation

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Determination of Calcium and Magnesium in Biodiesel by Flame Atomic Absorption Spectrometry Using Microemulsions as Sample Preparation

Content Provider	Semantic Scholar
Author	Jesus, Alexandre D. Zmozinski, Ariane Vanessa Barbará, Janaína Aith Vale, Maria Goreti Rodrigues Silva, Márcia Almeida
Copyright Year	2010
Abstract	An alternative method for the determination of calcium and magnesium in biodiesel samples by flame atomic absorption spectrometry (FAAS) is proposed. The samples were prepared as water-in-oil microemulsions, and aqueous standards microemulsified in the same way were used for calibration. A study of long-term stability shows that the analytes remained stable in the microemulsions for at least 5 days. To assess the accuracy of the results, other methods were applied, such as recovery tests, as well as a comparison to the Brazilian Standard Method ABNT NBR 15556, which consists of the sample dilution with an organic solvent and a determination by FAAS. Limits of detection (LOD) of 0.04 and 0.1 μg g−1 and characteristic concentrations of 30 and 6 μg L−1 were obtained for calcium and magnesium, respectively. The method showed better LODs and precision in relation to dilution with organic solvent. The results obtained were statistically in agreement with those obtained with the Brazilian Standard Method at a 95...
Starting Page	2109
Ending Page	2112
Page Count	4
File Format	PDF HTM / HTML
DOI	10.1021/ef9014235
Volume Number	24
Alternate Webpage(s)	https://repositorio.ufba.br/ri/bitstream/ri/5927/1/(26)ef9014235.pdf
Alternate Webpage(s)	https://doi.org/10.1021/ef9014235
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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