期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2019
卷号：10
期号：7
页码：1-9
出版社：University of Mohammed Premier Oujda
摘要：Electrochemical sensor for the specific and sensitive detection of Evans blue (EB) at
physiological pH in 0.2M phosphate buffer solution (PBS) was developed by the surface
modification using Triton X -100 (TX-100) surfactant. The cyclic voltammetry (CV)
studies show enhanced peak separation, appreciable sensitivity, selectivity and stability
which allowed this TX-100 surfactant modified carbon nanotube paste electrode (TX100MCNTPE)
to analyse EB individually and simultaneously along with tartrazine (TZ) in
the potential range of 0.2 V to 0.7 V. The electrode morphology was characterised by field
emission scanning electron microscopy (FESEM). The oxidation potential of EB shifted
negatively, and enhanced irreversible oxidation peak current was observed at 0.505V which
served as the analytical response. In the prime condition, the anodic peak current of EB
increased linearly, and two linear ranges were observed from 10 µM to 100 µM with the
limit of detection (LOD) of 5.06 µM and limit of quantification (LOQ) of 16.87 µM. Scan
rate studies reveal that the entire process in the electrode surface is adsorption controlled.
The modified electrode showed excellent reproducibility, repeatability and antifouling
properties.
