This study describes the development, electrochemical
characterization and utilization of 8,9-dihydroxy-
7-methyl-12H-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 (3s) of
0.05 mmol/L.
