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A Nanostructure Based Electrochemical Sensor for Square Wave Voltammetric Determination of L ‐Cysteine in the Presence of High Concentration of Folic Acid
Author(s) -
Khalilzadeh Mohammad A.,
KarimiMaleh Hassan,
Gupta Vinod K.
Publication year - 2015
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.201500040
Subject(s) - detection limit , electrochemistry , square wave , electrochemical gas sensor , folic acid , cysteine , carbon paste electrode , electrode , chemistry , nanoparticle , nuclear chemistry , voltammetry , linear range , inorganic chemistry , cyclic voltammetry , materials science , chromatography , nanotechnology , organic chemistry , medicine , physics , voltage , quantum mechanics , enzyme
This study describes the development, electrochemical characterization and utilization of 8,9‐dihydroxy‐7‐methyl‐12 H ‐benzothiazolo [2,3‐b]quinazolin‐12‐one (DMBQ)/ZnO nanoparticles (ZnO/Nps)‐carbon paste electrode (DMBQ/ZnO/NPs/CPE) as a modified sensor for the electrocatalytic determination of cysteine (Cys) in the presence of folic acid (FA). ZnO/NPs was synthesized and characterized by X‐ray diffraction (XRD) method. The prepared DMBQ/ZnO/NPs/CPE was developed as a highly sensitive voltammetric sensor for determination of Cys in the presence of FA in real samples. Square wave voltammetry (SWV) of Cys exhibited linear dynamic range with a detection limit (3 σ ) of 0.05 µmol/L.