@article{oai:kitami-it.repo.nii.ac.jp:02000483,
 author = {Chao-Hui Feng and Chiko Otani and Yuichi Ogawa},
 journal = {Food Control},
 month = {Jul},
 note = {Fourier transform far-infrared (FT-FIR) was exploited to evaluate the flavonoids content of orange extracts using Soxhlet extraction. The absorbance fingerprint spectra of hesperidin and naringin were identified in the range of 0.5 - 7 THz. Pre-treatments such as normalization, standard normal variate (SNV), multiplicative scatter correction (MSC), 1st and 2nd derivation were employed to enhance the robustness of the model performance. Partial least square regression model performed well to explain the relationship between THz spectra and concentrations of hesperidin and naringin, with the determination coefficients of prediction up to 0.99 (pre-treated by 1st deviation) for hesperidin and 0.97 for naringin, respectively. This study addressed the detection of hesperidin and naringin by using terahertz spectroscopy, which could potentially simplify the procedures to detect the flavonoids of orange extracts from waste orange peels.},
 title = {Terahertz spectroscopy coupled with multivariate analysis for non-invasively evaluating flavonoids extracts from waste orange peels},
 volume = {137},
 year = {2022}
}