Introduction of a novel fluorescence based method for the composition estimation of petroleum fuel-biofuel blends

► 'WLEF' based analysis enables facile prediction of biofuel/fossil fuel blend ratio. ► The technique is fiber optic compatible and can enable in situ analysis. ► Same instrument configuration takes care of any type of fuel blend. ► The technique is sensitive and accurate up to 1% of a component in a blend. ► The spectrometer design permits fabrication of a low cost portable instrument.