2.4. Analytical procedures
Mass spectrometry of biodiesels was performed on an ESI-ITMS
HCT Bruker-Daltonic GmbH instrument with AgNO3 used as
coordination ionization agent (Sandra et al., 2002). A simple flame
test was performed on the biodiesels. Kinematic viscosity of biodiesels
was determined through the method of ASTM D 445. Biodiesel
density was also determined. For comparison, commercial
(B40) and palm oil biodiesels were also analyzed.