The graphene nanoribbon modified screen printed electrode (G/SPE) has been produced to determinemorphine and diclofenac via differential pulse voltammetric, cyclic voltammetric, andchronoamperometry. Graphene nanoribbon shows great selectivity and sensitivity in determiningmorphine and diclofenac. The impact of scan rates has been explored. Findings showed that it isdiffusion-controlled. The impact of morphine concentrations has been investigated in ranges of 0.07-600.0?μM. Determination limit for morphine has been 20.0 nM. In general, an easy experimentalmethod for manufacturing graphene oxide nanoribbon has been suggested that takes advantage ofselectivity, reproducibility, and sensitivity toward electro-active specimens, as well as biologicalmatrices.
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