Detection of aflatoxin B1 in chili powder using attenuated total reflectance–Fourier transform infrared spectroscopy

Authors

Thin Thin Sein, Medical Technology Program, Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand, 40002
Urairat Mongmonsin, Center for Research and Development of Medical Diagnostic Laboratory (CMDL), Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand, 40002
Patutong Chatchawal, Center for Innovation and Standard for Medical Technology and Physical Therapy (CISMaP), Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand, 40002
Molin Wongwattanakul, Center for Innovation and Standard for Medical Technology and Physical Therapy (CISMaP), Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand, 40002
Oranee Srichaiyapol, Center for Innovation and Standard for Medical Technology and Physical Therapy (CISMaP), Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand, 40002
Rungrueang Pattanakul, Synchrotron Light Research Institute (SLRI), 111 University Avenue, Muang District, Nakhon Ratchasima, Thailand, 30000
Patcharaporn Tippayawat, Center for Research and Development of Medical Diagnostic Laboratory (CMDL), Faculty of Associated Medical Sciences, Khon Kaen University, Khon Kaen, Thailand, 40002Follow

Keywords

Aflatoxin B1, Attenuated total reflection−Fourier transform infrared spectroscopy (ATR–FTIR), Chili powder, Machine learning, Principal component analysis

Abstract

Aflatoxin B₁, a major global food safety concern, is produced by toxigenic fungi during crop growing, drying, and storage, and shows increasing annual prevalence. This study aimed to detect aflatoxin B₁ in chili samples using ATR–FTIR coupled with machine learning algorithms. We found that 83.6% of the chili powder samples were contaminated with Aspergillus and Penicillium species, with aflatoxin B₁ levels ranging from 7.63 to 44.32 µg/kg. ATR–FTIR spectroscopy in the fingerprint region (1800−400 cm^-1) showed peak intensity variation in the bands at 1587, 1393, and 1038 cm^-1, which are mostly related to aflatoxin B₁ structure. The PCA plots from samples with different trace amounts of aflatoxin B₁ could not be separated. Vibrational spectroscopy combined with machine learning was applied to address this issue. The logistic regression model had the best F1 score with the highest %accuracy (73%), %sensitivity (73%), and %specificity (71%), followed by random forest and support vector machine models. Although the logistic regression model contributed significant findings, this study represents a laboratory research project. Because of the peculiarities of the ATR–FTIR spectral measurements, the spectra measured for several batches may differ, necessitating running the model on multiple spectral ranges and using increased sample sizes in subsequent applications. This proposed method has the potential to provide rapid and accurate results and may be valuable in future applications regarding toxin detection in foods when simple onsite testing is required.

Abstract Image

Recommended Citation

Sein, Thin Thin; Mongmonsin, Urairat; Chatchawal, Patutong; Wongwattanakul, Molin; Srichaiyapol, Oranee; Pattanakul, Rungrueang; and Tippayawat, Patcharaporn (2024) "Detection of aflatoxin B1 in chili powder using attenuated total reflectance–Fourier transform infrared spectroscopy," Journal of Food and Drug Analysis: Vol. 32 : Iss. 2 , Article 5.
Available at: https://doi.org/10.38212/2224-6614.3497

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