Asymmetric Mach-Zehnder Interferometer based biosensing system for Aflatoxin M1 detection in milk.

Chalyan T., Potrich C., Falke F., Schreuder E., Heideman R.G., Pederzolli C., Adami A., Pavesi L.
  Giovedì 14/09   16:00 - 19:00   Aula A209   V - Biofisica e fisica medica
In this work, we present a biosensor system based on a label-free approach for Aflatoxin M1 (AFM1) detection, known as a carcinogenic toxin present in milk. Milk is a complex matrix, including multiple phases and several chemical species. Therefore, before sending to the sensor, milk needs to be treated and purified. The proposed system consists of three modules: a milk sample preparation module, a concentrator module and a photonic sensor which is based on asymmetric Mach-Zahnder Interferometers that are optimized for 850 nm wavelength. The described system detects AFM1 at the 50 ng/L level, which is in agreement with EU regulations.