▎ 摘　　要

NOVELTY - Synthesizing electrochemical sensor (100) (P1) comprises synthesizing copolymer of aniline and N-phenylglycine, processing the copolymer in order to surface functionalize with iminodiacetate group, where the surface fictionalization enables detection of the cadmium ion in the sample with a limit of detection of 50 ppb and incorporating a graphene oxide in backbone of the copolymer to obtain the electrochemical sensor , where the incorporation of the graphene oxide enhances the electrochemical sensor performance in terms of detection of the cadmium ion in the sample below 5 ppb, where the process for synthesizing the electrochemical sensor involves an electrochemical route. USE - The process is useful for synthesizing electrochemical sensor for detecting cadmium ion in sample (claimed) which is used for scaling production. ADVANTAGE - The polyaniline present in copolymer of aniline and N-phenylglycine that imparts passivation effect, thus providing protective coating against corrosion. The process: utilizes graphene oxide that increases electrochemical sensor performance in terms of detection of cadmium ion in sample below 5 ppb; and utilizes electrode for high performance detection of cadmium by square wave voltammeters; and is robust, provides better morphology, preferable for synthesis of thin films of desired thickness and, higher conductivity, and requires only very few chemicals and monomers. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for synthesizing electrochemical sensor (P2) comprising synthesizing a composite (104) comprising aniline, N-phenylglycine and graphene oxide via electrochemical route, depositing the composite onto a stainless-steel electrode substrate (102) surface, where the composite being deposited in form of a film on to the stainless-steel electrode substrate, where the depositing comprises choropotentiometric deposition, and functionalizing exposed surface of the film by iminodiacetate groups (106) by molecular stacking to obtain the electrochemical sensor ; #electrochemical sensor comprising film of the composite deposited on surface of the stainlesssteel electrode, where exposed surface of the film being functionalized by iminodiacetate groups by molecular stacking. DESCRIPTION OF DRAWING(S) - The figure shows schematic cross sectional view of the electrochemical sensor. Electrochemical sensor (100) Stainless-steel electrode substrate (102) Composite (104) Film by iminodiacetate groups (106)