1. G.
Knothe
, J. V.Gerpen and J.Krahl, The Biodiesel Handbook, AOCS Press, Champaign, 1st edn, 2005
2. Determination of Trace Elements in Vegetable Oils and Biodiesel by Atomic Spectrometric Techniques—A Review
3. Agência Nacional do Petróleo, Gás Natural e Biocombustíveis, Resolução ANP No. 14, de 11.5.2012-DOU 18.5. 2012
4. ABNT NBR 15556:2008: Fat Oil and Derivatives. Fatty Acid Methyl Esters. Determination of the Sodium, Potassium, Calcium and Magnesium Contents by Atomic Absorption Spectrometry, São Paulo, 2008
5. ABNT NBR 15553:2008: Fat Oil and Derivatives. Fatty Acid Methyl Esters. Determination of the Calcium, Magnesium, Sodium, Phosphorus and Potassium Contents by Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES), São Paulo, 2008