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Determination of Sulfur in Biodiesel by XRF Using the Gravimetric Standard Addition Method

Published

Author(s)

Lydia Baker, William R. Kelly, William F. Guthrie

Abstract

The sulfur content of three biodiesels samples was determined XRF using a calibration curve based on petroleum-based diesel SRMs and by the standard addition method using a high sulfur diesel fuel SRM as the spike. Biodiesel contains about 11 % oxygen by weight which is predicted to cause a negative bias of about 16 % compared to petroleum diesel which is contains no oxygen. This study found about a 19 % difference in good agreement with the theoretical prediction. It is demonstrated that the method of standard additions using weighted least squares regression makes sulfur determinations possible by XRF.
Citation
Journal of the American Chemical Society

Keywords

biodiesel, gravimetry, interferences, matrix, standard additin method, standard additions, sulfur

Citation

Baker, L. , Kelly, W. and Guthrie, W. (2021), Determination of Sulfur in Biodiesel by XRF Using the Gravimetric Standard Addition Method, Journal of the American Chemical Society (Accessed August 7, 2022)
Created October 12, 2021