Abstract
An electrocatalytic based sensor fabricated for square wave voltammetric determination of methyldopa in the presence of tyrosine. For this goal, carbon paste electrode modified with NiO nanoparticle (NiO/NPs) and 2-(3,4-dihydroxyphenethyl)isoindoline-1,3-dione (DHPID) (CPE/DHPID/NiO/NPs) suggested as a highly selective sensor. The CPE/DHPID/NiO/NPs showed an excellent character for electrocatalytic oxidization of methyldopa in aqueous solution. For the mixture containing methyldopa and tyrosine, the oxidation peaks potential well separated from each other with differential potential ~500mV. Methyldopa peak current increased linearly with its concentration at the ranges of 0.08–500μM. The CPE/DHPID/NiO/NPs was successfully used for the analysis of methyldopa in drug samples.
This is first voltammetric report sensor for analysis of methyldopa in the presence of tyrosine using modified electrochemical sensors. [Display omitted]
•High sensitive electrochemical sensor for determination of methyldopa•Good ability of proposed sensor for biological and pharmaceutical analysis•Simultaneous determination of methyldopa and tyrosine for the first time