Food contamination test using combined laser-induced breakdown spectroscopy (LIBS) and Raman spectroscopy

Sungho Shin; Iyll-Joon Doh; Bartek Rajwa; Euiwon Bae; J. Paul Robinson

doi:10.1117/12.2665238

13 June 2023 Food contamination test using combined laser-induced breakdown spectroscopy (LIBS) and Raman spectroscopy

Sungho Shin, Iyll-Joon Doh, Bartek Rajwa, Euiwon Bae, J. Paul Robinson

Proceedings Volume 12545, Sensing for Agriculture and Food Quality and Safety XV; 125450B (2023) https://doi.org/10.1117/12.2665238
Event: SPIE Defense + Commercial Sensing, 2023, Orlando, Florida, United States

Abstract

Due to the increasing complexity of the food supply chain, the likelihood of food adulteration or contamination is a significant problem for food safety. Agricultural products may be chemically, physically, or biologically manipulated at numerous points along the supply chain. To address this issue and improve food safety, it is necessary to implement innovative measurement technologies for biohazard detection. Currently, accessible food analysis techniques include vibrational spectroscopy and mass spectrometry. However, optical techniques such as laser-induced breakdown spectroscopy (LIBS) and Raman systems are gaining popularity due to their real-time analysis capabilities and minimal requirements for sample preparation. In this study, we combined LIBS and Raman detection to analyze the elemental and molecular composition of various food matrices for the purpose of detecting food contamination in real time. We examined typical generic herbicides containing glyphosate, such as Roundup. The samples were spiked by spraying the chemical compound on the surface of fruits. The results revealed that it is possible to assess complex food matrices polluted with widespread organic contaminants by combining optical spectroscopies very rapidly.

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Sungho Shin, Iyll-Joon Doh, Bartek Rajwa, Euiwon Bae, and J. Paul Robinson "Food contamination test using combined laser-induced breakdown spectroscopy (LIBS) and Raman spectroscopy", Proc. SPIE 12545, Sensing for Agriculture and Food Quality and Safety XV, 125450B (13 June 2023); https://doi.org/10.1117/12.2665238

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KEYWORDS

Raman spectroscopy

Laser induced breakdown spectroscopy

Contamination

Surface enhanced Raman spectroscopy

Spectroscopy

Safety

Pulsed laser operation

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