▎ 摘　　要

Over the years, widely increasing overdose and improper disposal of drugs are harmful to public health and the ecosystem. Herein, the nanostructured praseodymium tungstate decorated on reduced graphene oxide (PW NPs/ R-GO) composite was used for the detection of antiprotozoal drug dimetridazole (DMZ). The nanostructured PW NPs were prepared by solvent evaporation from peroxo-tungstic acid and the composite of PW NPs/R-GO was assembled through a facile ultrasonication method. Under the suitable circumstance, the fabricated PW NPs/R-GO/GCE sensor displays outstanding electrocatalytic performance towards DMZ, and significantly, provided a higher reduction response than PW NPs/GCE, R-GO/GCE, and bare GCE. This fabricated sensor achieved a nanomolar detection limit (1.2 nM) and a wide linear range (0.001-965 mu M) of DMZ by using highly sensitive DPV techniques. The constructed sensor endows excellent repeatability, reproducibility, selectivity, and storage stability performance. However, the practical capability of constructed PW NPs/R-GO/GCE sensor was suc-cessfully verified in biological, and environmental fluids to achieve a good recovery result. Therefore, this work endows a new perception for real-time sensing of DMZ in biological and aquatic samples.