Fabrication of a sensitive electrochemical sensor based on hybrid polyamide/chromotropic acid nanofibers electrospun on glassy carbon electrode for Hg2+ sensing in drinking water and canned fish samples

•A new electrochemical sensor was designed based on a hybrid of polyamide (PA) and chromotropic acid (CA) nanofibers electro spun on glassy carbon electrode (GCE).•This sensor was utilized to accurate and sensitive analysis of Hg2+ ions at Nanomolar (nmolL-1, nM) level.•The designed sensor exhibited reproducible response and a high level of stability in the all-electrochemical experiments.•This new electro spun based sensor is used for quantifying Hg2+ in drinking water and canned fish samples with the accurate and precise results and no side interferences.