Abstract:
Biological compounds like dopamine (DA) depict a crucial role in food, clinical and human
metabolism. Abnormalities in DA concentration lead to serious disorders, hence, requires an
efficient sensor for its detection. A highly selective and sensitive electrochemical sensor for DA is
prepared by modification of GCE with imidazolium based ionic liquid, Alginate and ZnS
nanoparticles. Hydrogels are being investigated for a variety of sensing applications due to their
high-water content and biocompatibility. The synthesis of the materials was confirmed by
different techniques such as FTIR, XRD, 1HNMR, and UV-Vis. Herein, we report the
modification of GCE with imidazolium-based ionic liquid, acrylated alginate and chemically
synthesized zinc sulphide nanoparticles The IL/Alg/GCE and IL/Alg/ZnS/GCE exhibited
selective electro catalytic performance for DA sensing. IL/Alg/ZnS/GCE exhibited a stable
amperometry results up to 1.763uM DA concentration. In addition, IL/Alg/ZnS/GCE, IL/Alg/GCE
displayed a negligible response to interferents like ascorbic acid, glucose, NaCl, citric acid at the
selected applied potential.
