TY  - JOUR 
T1  - Simultaneous Determination of Na, K and Ca in Biodiesel by Flame Atomic
               Emission Spectrometry
JO  - Journal of the Brazilian Chemical Society
A1  - Raposo, Juliana D.
A1  - Costa, Letícia M.
A1  - Barbeira, Paulo Jorge S.
SN  - 0103-5053
UL  - 10.5935/0103-5053.20140231
VL  - 26 
Y1  - 2015
PB  - Brasil 
ER  -