DS EN 14538:2006 Fat And Oil Derivatives - Fatty Acid Methyl Ester (Fame) - Determination Of Ca, K, Mg And Na Content By Optical Emission Spectral Analysis With Inductively Coupled Plasma (Icp Oes) Describes a procedure for the direct determination of the soap building elements Calcium (Ca), Magnesium (Mg), Sodium (Na) and Potassium (K) in fatty acid methyl esters (FAME) by ICP OES at levels of