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Graphene transistor catches mycotoxins in food

Researchers have developed a method for direct, point-of-use detection of mycotoxins in food. The method is based on the modification of electrolyte operated graphene filed effect transistors that have been specifically functionalized with aptamers by covalent binding. Demonstrating the performance of this method on Ochratoxin A, these sensors show a response time of within 5 minutes with a sensitivity down to 4 pg/ml – that is about three orders of magnitude less than accepted tolerance levels of Ochratoxin A.

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