Determination of Sulfur in Biodiesel by XRF Using the Gravimetric Standard Addition Method
Lydia Baker, William R. Kelly, William F. Guthrie
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.
Journal of the American Chemical Society
biodiesel, gravimetry, interferences, matrix, standard additin method, standard additions, sulfur
, Kelly, W.
and Guthrie, W.
Determination of Sulfur in Biodiesel by XRF Using the Gravimetric Standard Addition Method, Journal of the American Chemical Society
(Accessed September 21, 2023)