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A comprehensive approach for milk adulteration detection using inherent bio-physical properties as 'Universal Markers': Towards a miniaturized adulteration detection platform

A comprehensive approach for milk adulteration detection using inherent bio-physical properties as 'Universal Markers': Towards a miniaturized adulteration detection platform

Food Chemistry 217: 756-765

This paper proposes a novel milk quality detection approach based on utilization of inherent biophysical properties as 'markers' for adulteration. Unlike the traditional adulterant-specific approaches, this method is generic and universal. It exploits the change in innate milk properties, such as electrical conductivity and pH, upon addition of adulterants as a transduction mechanism for detecting milk adulteration. In this work, adulteration with more than 10 commercially known hazardous adulterants is detected by monitoring the changes in milk electrical conductivity and pH. The electrical parameters for pure milk were standardized using AC impedance-spectroscopy with glassy carbon working electrode and platinum counter/reference electrode at a potential of 0.3V and in the frequency range of 1Hz-1MHz. The experiments were repeated using gold-electrodes fabricated on glass-substrate as a first step towards developing a miniaturized platform. The concept of a 'unified-universal-marker' for successful prediction of adulteration is accentuated in this work.

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Accession: 057058045

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PMID: 27664695

DOI: 10.1016/j.foodchem.2016.09.037

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