2023-08-02 パデュー大学
◆研究者たちは、光の偏光法を使用して食品の原子組成と化学構造を調べ、材料と調理方法、可能ならば原産地を特定する方法を開発しています。これまでの実験では、試料の99％の正確さで本物のバニラエキスと偽物のバニラ風味を区別し、約90％の正確さで欧州のチーズとウィスコンシン州のグリュイエールチーズを識別できることが示されています。この技術により、食品業界における贋作問題に対処する手段が向上する可能性があります。
＜関連情報＞
- https://www.purdue.edu/newsroom/releases/2023/Q3/gourmet-or-imitation-new-technique-ferrets-out-food-fraud.html
- https://www.mdpi.com/2304-8158/12/2/402?_ga=2.42659301.1797508583.1691034673-1085351435.1681791653
ポータブルレーザー誘起ブレークダウン分光システムを用いた迅速な食品認証 Rapid Food Authentication Using a Portable Laser-Induced Breakdown Spectroscopy System
Xi Wu,Sungho Shin,Carmen Gondhalekar,Valery Patsekin,Euiwon Bae,J. Paul Robinson andBartek Rajwa
Foods Published: 14 January 2023
DOI:https://doi.org/10.3390/foods12020402
Abstract
Laser-induced breakdown spectroscopy (LIBS) is an atomic-emission spectroscopy technique that employs a focused laser beam to produce microplasma. Although LIBS was designed for applications in the field of materials science, it has lately been proposed as a method for the compositional analysis of agricultural goods. We deployed commercial handheld LIBS equipment to illustrate the performance of this promising optical technology in the context of food authentication, as the growing incidence of food fraud necessitates the development of novel portable methods for detection. We focused on regional agricultural commodities such as European Alpine-style cheeses, coffee, spices, balsamic vinegar, and vanilla extracts. Liquid examples, including seven balsamic vinegar products and six representatives of vanilla extract, were measured on a nitrocellulose membrane. No sample preparation was required for solid foods, which consisted of seven brands of coffee beans, sixteen varieties of Alpine-style cheeses, and eight different spices. The pre-processed and standardized LIBS spectra were used to train and test the elastic net-regularized multinomial classifier. The performance of the portable and benchtop LIBS systems was compared and described. The results indicate that field-deployable, portable LIBS devices provide a robust, accurate, and simpl
