Yang Lan-Hee, Maeng Inhee, Lee Sanggu, Kim Kwangsung, Ji Young Bin, Bark Hyeon Sang, Shin Hee Jun, Oh Seung Jae
YUHS-KRIBB Medical Convergence Research Institute, College of Medicine, Yonsei University, Seoul, 03722, Republic of Korea.
DADream gristmill, Cheorwon-gun, Gangwon-do, 24031, Republic of Korea.
NPJ Sci Food. 2025 Jul 17;9(1):140. doi: 10.1038/s41538-025-00500-0.
The utility of terahertz time-domain spectroscopy (THz-TDS) for the qualitative and quantitative analysis of edible oils remains underexplored. Therefore, we aimed to characterize an edible oil mixture consisting of perilla, soybean, and corn oils using THz-TDS spectroscopy and compare the findings with those from Fourier transform infrared spectroscopy (FT-IR) and proton nuclear magnetic resonance (H NMR) spectroscopy. THz-TDS was used to obtain complex optical constants such as power absorption and refractive index of oils in the range of 0.2-2.0 THz. Perilla oil mixtures were quantitatively analyzed using complex dielectric constants in the THz frequency region. We characterized the double bond structure of omega-3 in perilla oil using THz-TDS. Furthermore, we used reflection-mode THz-TDS imaging to demonstrate its application as a non-destructive authenticity test for bottled edible oil.
太赫兹时域光谱（THz-TDS）在食用油定性和定量分析方面的应用仍未得到充分探索。因此，我们旨在利用THz-TDS光谱对由紫苏油、大豆油和玉米油组成的食用油混合物进行表征，并将结果与傅里叶变换红外光谱（FT-IR）和质子核磁共振（H NMR）光谱的结果进行比较。THz-TDS用于获取0.2 - 2.0太赫兹范围内油的功率吸收和折射率等复光学常数。利用太赫兹频率区域的复介电常数对紫苏油混合物进行定量分析。我们用THz-TDS表征了紫苏油中ω-3的双键结构。此外，我们使用反射模式太赫兹时域光谱成像来证明其作为瓶装食用油无损真伪检测的应用。
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