Location: Food and Feed Safety ResearchTitle: Recent development of optical methods in rapid and non-destructive detection of aflatoxin and fungal contamination in agricultural products
|TAO, FEIFEI - Mississippi State University|
|YAO, HAIBO - Mississippi State University|
|HRUSKA, ZUZANA - Mississippi State University|
|BURGER, LOREN - Mississippi State University|
|Rajasekaran, Kanniah - Rajah|
Submitted to: Trends in Analytical Chemistry
Publication Type: Review Article
Publication Acceptance Date: 1/3/2018
Publication Date: 1/3/2018
Citation: Tao, F., Yao, H., Hruska, Z., Burger, L.W., Rajasekaran, K., Bhatnagar, D. 2018. Recent development of optical methods in rapid and non-destructive detection of aflatoxin and fungal contamination in agricultural products. Trends in Analytical Chemistry. 100:65-81. https://doi.org/10.1016/j.trac.2017.12.017.
Technical Abstract: Aflatoxins are a group of highly toxic secondary metabolites produced predominantly by Aspergillus fungi. Aflatoxin and aflatoxigenic contamination can occur in a wide variety of agricultural products during both pre- and post-harvest conditions, posing potential severe hazards to human health. However, current methods for detection of aflatoxin contamination and fungal infection are mainly based on wet chemical analysis and classical microbiological techniques, which are generally expensive, time-consuming, destructive to the test samples and require skilled personnel to perform, making them impossible for large-scale non-destructive screening, detection, or integration in an on-line sorting and production system. In this context, the great necessity of developing rapid and non-destructive techniques for aflatoxin contamination and fungal infection in foods has been highlighted. Measurement techniques based on fluorescence spectroscopy (FS), near-infrared spectroscopy (NIRS) and hyperspectral imaging (HSI) have provided interesting and promising results for detecting aflatoxin contamination and/or fungal infection in a variety of foods. As such, the main goal of this article is to give an overview of the current research progress in application of FS, NIRS and HSI techniques in rapid and non-destructive detection of aflatoxin contamination and fungal infection in different varieties of agricultural products, including corn, rice, wheat, peanuts, almonds, pistachio nuts, dried figs, dried dates, chili peppers, etc. These techniques are described in terms of their working principles, features and application advantages in detecting aflatoxins and fungal contamination. The research advances of each technique applied in different varieties of agricultural products are reviewed and the results obtained from different studies are compared and discussed. In addition, perspectives on their future trends and challenges are also addressed.