Surface-Enhanced Raman Spectroscopy for Monitoring Extravirgin Olive Oil Bioactive Components

Figure 1

Schematic description of the data elaboration procedure based on the wavelet algorithm. The measured spectrum of an olive oil sample is reported in (a) panel. The signal exhibits a strong fluorescence signal centred at 1017 cm⁻¹, corresponding to a wavelength of about 675 nm. Using direct wavelet transform (DWT) algorithm, the signal has been decomposed in components at different scales. The signal has been reconstructed by excluding high-scaled ((b) panel) and low-scaled ((c) panel) components. The resulting signal is shown in (d) panel.