[13] [13] Ramos M P, Ruisnchez I. Noise and background removal in Raman spectra of ancient pigments using wavelet transform[J]. Journal of Raman Spectroscopy, 2005, 36(9): 848-856.

[14] [14] Tar T H M, Jordi C, Putthiporn K, et al. PLS-regression-model-assisted raman spectroscopy for vegetable oil classification and non-destructive analysis of alpha-tocopherol contents of vegetable oils[J]. Journal of Food Composition and Analysis, 2021, 103: 104119.

[15] [15] Liu H, Chen Y, Shi C, et al. FT-IR and Raman spectroscopy data fusion with chemometrics for simultaneous determination of chemical quality indices of edible oils during thermal oxidation[J]. LWT, 2020, 119: 108906.

[16] [16] Iago H B, Layla S P, Mrcia H C N, et al. Use of portable Raman spectroscopy in the quality control of extra virgin olive oil and adulterated compound oils[J]. Vibrational Spectroscopy, 2021, 116: 103299.