ONORM EN 14538:2025

Fat and oil derivatives - Fatty acid methyl ester (FAME) - Determination of Ca, Mg, Na, K and P content by optical emission spectral analysis with inductively coupled plasma (ICP OES)

This document specifies a method for the direct determination of the content of the soap formers calcium (Ca), magnesium (Mg), sodium (Na), potassium (K) and phosphorus (P) in fatty acid methyl esters (FAME) using ICP OES. The mass proportions of each component or combinations of components to which this method is applicable are given in Table 1. Table 1 - Applications for each element Element Application range mg/kg Ca 0.3 to 5.4 Mg 0.3 to 4.6 Na 0.4 to 5.0 K 0.6 to 5.3 P 1.0 to 5.0 Ca + Mg 0.5 to 9.4 Na + K 1.0 to 9.9 Ca + Mg + Na + K 1.4 to 19.3 WARNING - The use of this Document may involve the use of hazardous substances, operations and equipment. This document does not purport to address all related security issues. It is the responsibility of the person using the document to take appropriate health and safety measures before use and to check whether any other related requirements apply. NOTE For the purposes of this document, the expression “% (V/V)” is used to indicate the volume fraction f of a substance.