Effect of scan rate and pH on determination amoxilline using screen printed carbon electrode modified with functionalized graphene oxide

الملخص EN

Graphene oxide GO was functionalized with 4-amino, 3-substituted 1H, 1, 2, 4 Triazole 5(4H) thion (ASTT) to obtain GOT.

GOT characterized by FT-IR, XRD.via modification of the working electrode of the SPCE with the prepared nanomaterial (GOT) the effect of scan rate and pH on the determination of Amoxilline (AMOX) was studied using cyclic voltammetry.

AMOX show various responses at pH ranging from 2 to 7 and also was observed sharp increase in the oxidation peaks in the pH 3.

The formal potential (midpoint) for AMOX was highly pH-dependent.

From the effect of scan rate, surface coverage concentration Γ of electroactive species the values of the electron transfer coefficient and the electron transfer constant rate ket was obtained as 5.39×10-10 molcm-2, 0.5, and 2.45×10-3 cm.s-1respectively.