Comparison of gas chromatography-combustion-mass spectrometry and gas chromatography-flame ionization detector for the determination of fatty acid methyl esters in biodiesel without specific standards

1. Sobrado, L.A.
2. Freije-Carrelo, L.
3. Moldovan, M.
4. Encinar, J.R.
5. Alonso, J.I.G.