This study describes the development, electrochemical characterization and utilization of 8,9‐dihydroxy‐7‐methyl‐12 H ‐benzothiazolo [2,3‐b]quinazolin‐12‐one (DMBQ)/ZnO nanoparticles (ZnO/Nps)‐carbon paste electrode (DMBQ/ZnO/NPs/CPE) as a modified sensor for the electrocatalytic determination of cysteine (Cys) in the presence of folic acid (FA). ZnO/NPs was synthesized and characterized by X‐ray diffraction (XRD) method. The prepared DMBQ/ZnO/NPs/CPE was developed as a highly sensitive voltammetric sensor for determination of Cys in the presence of FA in real samples. Square wave voltammetry (SWV) of Cys exhibited linear dynamic range with a detection limit (3 σ ) of 0.05 µmol/L.
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Khalilzadeh et al. (2015) studied this question.
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