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Screen‐printed Electrode Modified with ZnFe 2 O 4 Nanoparticles for Detection of Acetylcholine
Author(s) -
Beitollahi Hadi,
Safaei Mohadeseh,
Tajik Somayeh
Publication year - 2019
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201900116
Subject(s) - detection limit , acetylcholine , electrode , differential pulse voltammetry , analytical chemistry (journal) , materials science , reproducibility , cyclic voltammetry , nanoparticle , chemistry , voltammetry , electrochemistry , nanotechnology , chromatography , medicine , endocrinology
In this paper a sensor to detect acetylcholine on the basis of ZnFe 2 O 4 nanoparticles modified screen printed electrode (SPE) is reported. In the range 0.08–500.0 μM, with the detection limit of 0.024±0.001 μM, acquired anodic peak currents where shown to be linearly dependent on acetylcholine concentrations by differential pulse voltammetry (DPV). It was proven that acetylcholine oxidation at adjusted electrode surface takes place at 100 mV potential less positive compared to an unadjusted screen printed electrode. The electron transfer coefficient (α=0.51) and diffusion coefficient (D=9.3×10 −6 cm 2 /s) of acetylcholine oxidation were determined too. In addition, this original sensor possesses numerous benefits such as reproducibility, high stability and rapid response (20 s).