Presence of fatty acid ethyl esters (FAME) in diesel fuel or domestic heating fuel (both hereinafter referred toas diesel fuel) is a signal of blending with biodiesel. The control of FAME content in diesel fuel is an essentialand actual task because of the need of the right fuel identification and registration of possible FAME impacton engines and fuel systems. To control the compliance one of the most accurate, rapid and simple methodsis EN 14078:2014.