USK Conferences, International Conference On Patchouli and Essential Oil Research Innovation 2023 (IConPEORI-2023)

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Authenticity of Essential Oil Spectral Pattern Using Spectral Pre-Processing Techniques
Hesti Meilina

Last modified: 2023-10-18


Non-targeted analysis by Fourier-transform infrared (FTIR) spectroscopy combined with chemometrics has gained popularity as an alternative instead of classical GC-based methods because it allows fast, green, non-destructive and cost-effective assessment of quality of essential oils. In this study, the FTIR spectra of four types of essential oils (patchouli oil, nutmeg oil, citronellal oil and eucalyptus oil) obtained using Shimadzu IR-Prestige 21 were authenticated in order to investigate the characteristics of the functional groups of the four types essential oils by carrying out spectra pre-processing and the wavenumber region suspected the characteristics of the three essential oils. Principal Component Analysis (PCA) as unsupervised classification was used to outline the similarities and differences among four types of essential oil from 60 samples for each type. PCA resulted four clusters from four different type of essential oil whereas patchouli oil and nutmeg oil has similarity. Further, citronellal oil and eucalyptus oil was separated in significant distance with others. Spectral pre-processing and PCA confirmed that essential oil samples extracted from plants differ significantly in their content and therefore have unique spectral fingerprints.