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Zeolite Nanoparticle Modified Carbon Paste Electrode as a Biosensor for Simultaneous Determination of Dopamine and Tryptophan
Author(s) -
Balal Khalilzadeh,
Mohammad Hasanzadeh,
Bahareh Bakhoday,
Ali Babaei,
Maryam Hajjizadeh,
Mozhgan Zendehdel
Publication year - 2009
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200900117
Subject(s) - chemistry , differential pulse voltammetry , tryptophan , electrode , carbon paste electrode , biosensor , zeolite , voltammetry , cyclic voltammetry , carbon fibers , detection limit , inorganic chemistry , nuclear chemistry , chromatography , electrochemistry , catalysis , organic chemistry , biochemistry , composite number , materials science , amino acid , composite material
A new chemically modified electrode is constructed based on an iron(III) doped zeolite modified carbon paste electrode (Fe 3+ Y/ZCME). The electrode was evaluated as a sensor for sub‐micromolar determination of tryptophan (Trp) and dopamine (DA). The measurements were carried out using the differential pulse voltammetry (DPV) method in a phosphate buffer solution with pH = 5. The prepared modified electrode shows voltametric responses with high sensitivity and stability for DA and Trp in optimal conditions. The analytical performance of this sensor has been evaluated for detection of DA and Trp in human serum.