In the present study, the use of a carbon paste electrodemodified by 8,9-dihydroxy-7-methyl-12H-benzothiazolo
[2,3-b]quinazolin-12-one (DMBQ) and ZnO/CNTs nanocomposite (DMBQ/ZnO/CNTs/CPE) prepared by a simple
and rapid method was described. The modified electrode showed an excellent character for electrocatalytic
oxidization of glutathione (GSH) and amoxicillin (AMX). Their squarewave voltammetric peak current increased
linearly with their concentration at the ranges of 0.002–720 and 1.0–950 μM, respectively with the detection
limits of 0.0008 and 0.5 μM, respectively. The modified electrode was successfully used for the determination
of the analytes in real samples with satisfactory results.
