▎ 摘　　要

Two sensitive and selective potentiometric sensors based on zinc-iron layered double hydroxides/multiwalled carbon nanotubes (Zn Fe LDH/MWCNTs) (sensor I) and graphene/multiwalled carbon nanotubes (Gr/MWCNTs) (sensor II) nanocomposites were developed for benzydamine hydrochloride (Benz) determination. The investigated sensors displayed excellent Nernstian slopes 58.5 +/- 0.7 and 59.5 +/- 0.5 mV decade(-1), detection limits 8.3x10(-7) and 1.9x10(-7) molL(-1), long lifetimes, adequate selectivity, high chemical, and thermal stability within pH range of 2.4-8.5 for sensors I and II, respectively. The surface morphology of sensors was analyzed using a Transmission Electron Microscope (TEM). The analytical method was efficiently implemented for Benz determination in biological fluids and surface water samples.