Title
Authentication of the geographical origin of patchouli oil using front‐face fluorescence spectroscopy and chemometric analysis
Author
Dimas Firmanda Al Riza, Slamet Widodo, Y. Aris Purwanto, Naoshi Kondo
Year
2018
Journal
Flavour and Fragrance Journal
Abstract
Increasing consumer awareness of the authenticity of products has led to a demand for rapid measurement methods to support the traceability of high‐value commodities. In this research, a front‐face method was used to obtain fluorescence excitation–emission matrix fingerprints of patchouli oil samples from different geographical origins in Indonesia. Principal component analysis (PCA) was then used to explore the excitation–emission matrix (EEM) data structure of the samples, and 3D eigenvector value thresholding was used to discriminate important variables. It was found that there were five important EEM regions representing the sample variation. A decision‐tree model with a subset of two important regions, i.e. regions 1 and 3, was then developed for the classification of patchouli oils from different Indonesian islands. These results show that front‐face fluorescence spectroscopy has the potential to be used as a supporting tool for the discrimination of the geographical origin of patchouli oils.
Instrument
FP-8300
Keywords
Fluorescence, Excitation emission matrix, Agriculture and environmental