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Electrical Impedance Spectroscopy (EIS) technique is found to be an excellentcandidate for bio-sensing and food quality monitoring applications due to itsrapid, robust, cost-effective and point-of-care approach. The present researchwork investigates the implementation of EIS technique supported by severaloptical spectroscopic techniques such as Ultraviolet-Visible (UV-Vis) andFourier Transform Mid Infrared (FT-MIR) to detect and quantify several toxicadulterants in foods and bio-consumables. A comprehensive understanding on thebackground theory related to the study has been developed to analyze theoverall polarization of the system and the effect of frequency on complexpermittivity of such system have been observed. In the current work, thetechnique is applied to adulterated saccharides, honey and turmeric samplesthrough a prototype sensing device. All the corresponding measurements havebeen performed by dipping a custom-made parallel plate conductivity cell withunity cell constant inside the solution under test. EIS study exhibited asteady variation of electrical parameters such as impedance, capacitance,conductance and current values with increasing adulterant percentage in thesolution. Variation in such properties due to adulteration provides asystematic sensor plot through which one can determine their percentage ofadulteration in unknown adulterated samples. Co-efficient of sensitivity hasbeen extracted from the EIS data for adulteration study in terms of one of themeasured parameters. The results of UV-Vis and FT-MIR studies have been usedfor comparative analyses which corroborate with the EIS results, whereverapplicable.

Development Of Impedance and Capacitance based Sensors for the Estimation of Adulterant Ingredients in Different Bio-Consumables