Surfactant and polymer layered carbon composite electrochemical sensor for the analysis of estriol with ciprofloxacin

Abstract

ABSTRACT This article exposes an approachable strategy for the responsive electrochemical analysis of estriol (ER) hormone by designing a sensitive and selective sensor of sodium dodecyl sulphate and polymerised xanthacridinum modified carbon nanotube and graphite composite paste electrode (SDS-PXAMCNTGCPE) via linear sweep voltammetry (LSV), cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques. ER exposed a fine resolved irreversibly oxidised peak in phosphate buffer solution (PBS) of pH 7.0. CV and DPV reveal a commendable linear relation between oxidative peak current of ER and concentration of ER in the range 2 µM to 200 µM and 10 µM to 70 µM and they provide a promising lowest limit of detection (LOD) values of 2.9 × 10−7 M and 1.9 × 10−7 M. CV and DPV techniques were also applied to examine the selectivity of ER with Ciprofloxacin (CF). The adapting capability of SDS-PXAMCNTGCPE was accountable for the lower level identification of ER in sewage water as a real sample. The proposed sensor needs an easy preparation method with low cost and it exhibits superior sensitivity, stability, repeatability, and reproducibility.