BS EN 14110:2019,Fat and oil derivatives – Fatty Acid Methyl Esters – Determination of methanol content.BS EN 14110:2019 pdf free download.
BS EN 14110:2019 specifies a method for the determination of the methanol content of fatty acid methyl esters (FAME) for use as diesel fuel and domestic heating fuel. The method is applicable to methanol contents between 0,01 % (m/m) and 0,5 % (m/m). The method is not applicable to mixtures of FAME containing other low boiling components.
Normative references
EN 1SO 3170, Petroleum liquids – Manual sampling;
EN 1SO 3171, Petroleum liquids -Automatic pipeline sampling;
Principle
The sample is heated at 80°C in a hermetically sealed vial to allow desorption of contained methanol into the gas phase. When the equilibrium is reached a defined part of the gas phase is injected into a gas hromatograph, where methanol is detected with a flame ionization detector.
The amount of methanol can be determined either by internal calibration (procedure A) or by external calibration (procedure B).
If only manual equipment is available then only internal standard calibration should be used.
5.3 Reference FAME, with a methanol content less than 0,001% (m/m) Reference FAME can either be obtained from commercial sources or by washing FAME three to five times with distilled water in a separator funnel. FAMB should be then dried by heating at 90°C under stirring and reduced pressure.
5.4 Carrier gas, nitrogen, helium or hydrogen, of know purity greater than 99%.