Detection of Moldy Gastrodia Elata Based on Mid Infrared Spectroscopy

DOI: https://doi.org/10.62517/jlsa.202507401

Author(s)

Yan Cai1, Peisheng Yan2, Yuqiong Shan1, Ningyun Dan1, Kaize Shen3, Dianxu Ma1,*

Affiliation(s)

1School of physics and information engineering, Zhaotong University, Zhaotong, Yunnan, China 2School of Geographic Science and tourism, Zhaotong University, Zhaotong, Yunnan, China 3Yunnan Provincial Key Laboratory of Gastrodia and Fungi Symbiotic Biology, Zhaotong University, Zhaotong, Yunnan, China *Corresponding Author

Abstract

In order to solve the problem that Gastrodia elata is easy to mildew and produce mycotoxins during storage, and overcome the limitations of traditional detection methods, such as strong subjectivity and low efficiency, the spectral characteristics of normal and laboratory mildew samples were systematically analyzed by Fourier transform infrared spectroscopy combined with potassium bromide compression method. The results showed that although there were differences in the background spectra of Gastrodia elata in different production areas, the mildew samples showed consistent changes in the three key spectral areas of 3400 cm-1, 1630 cm-1 and 1050 cm-1, which revealed the chemical nature of microbial biomass and water increase, protein degradation and transformation, and polysaccharide system reconstruction, respectively, providing a reliable spectral basis for mildew identification. This study confirmed that mid infrared spectroscopy technology can surpass the differences of production areas, and achieve rapid and nondestructive identification of moldy Gastrodia elata by capturing common chemical changes, which provides an effective means for quality and safety control.

Keywords

Mid Infrared Spectroscopy; Gastrodia Elata; Mildew Detection; Rapid Identification; Changes in Chemical Composition; Cross Region Analysis

References

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