Dr. Xiai Chen Profile

Dr. Xiai Chen

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Proceedings Article | 18 November 2019 Paper

Detection of illegal additives for health products based on terahertz spectroscopy

Yiwen Fu, Xiai Chen, Xue Wu, Piaoyun Chen, Pingjie Huang

Proceedings Volume 11196, 111960B (2019) https://doi.org/10.1117/12.2538462

KEYWORDS: Terahertz spectroscopy, Absorption, Terahertz radiation, Spectroscopy, Refraction

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The terahertz time-domain spectra of sildenafil, metformin hydrochloride and phenolphthalein samples were obtained by terahertz time-domain spectroscopy. The refractive index spectra and absorption spectra of these additives were obtained according to the formula. The experimental results show that these three health supplements have obvious characteristic absorption peaks in the terahertz band. The illegal additives were classified based on support vector machine (SVM). The experimental results show that the established SVM model can accurately identify the check set and identify the additive within a certain range. The feasibility of terahertz time-domain spectroscopy for food ingredient detection was verified, which provided a new experimental method for the detection of health product additives.

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