Development of electrochemical impedance spectroscopy based sensing system for DEHP detection
AuthorsZia, Asif I.
Mohd. Syaifudin, A. R.
Mukhopadhyay, Subhas Chandra
Al-Bahadly, Ibrahim H.
Gooneratne, Chinthaka Pasan
KAUST DepartmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Sensing, Magnetism and Microsystems Lab
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AbstractThis research work presents a real time and non invasive technique to detect Di(2-ethylhexyl) phthalate (DEHP)content in purified water and quantify its concentration by Electrochemical Impedance Spectroscopy(E.I.S.). Planar Inter-digital capacitive sensor is employed to evaluate conductivity, permeability and dielectric properties of material under test. This sensor, consisting of inter-digitated microelectrodes, is fabricated on silicon substrate using thin-film Microelectromechanical system (MEMS) based semiconductor device fabrication technology. Impedance spectrums are obtained with various concentrations of DEHP in purified water by using an electric circuit in order to extract sample conductance. Relationship of sample conductance with DEHP concentration is studied in this research work which enables us to show the ability of E.I.S. to detect DEHP concentration in water and hence can be applied in water treatment process for contamination quantification. © 2011 IEEE.
Conference/Event name2011 5th International Conference on Sensing Technology, ICST 2011