Dinuclear copper(II) octaazamacrocyclic complex in a PVC coated GCE and graphite as a voltammetric sensor for determination of gallic acid and antioxidant capacity of wine samples
Само за регистроване кориснике
2015
Чланак у часопису (Објављена верзија)

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A novel efficient differential pulse voltammetric (DPV) method for determination gallic acid (GA) was developed by using an electrochemical sensor based on [Cu(2)tpmc](ClO4)(4) immobilized in PVC matrix and coated on graphite (CGE) or classy carbon rod (CGCE). The proposed method is based on the gallic acid oxidation process at formed [Cu(2)tpmcGA](3+) complex at the electrode surface. The complexation was explored by molecular modeling and DFT calculations. Voltammograms for both sensors, recorded in a HNO3 as a supporting electrolyte at pH 2 and measured in 2.5 x 10(-7) to 1.0 x 10(-4) M of GA, resulted with two linear calibration curves (for higher and lower GA concentration range). The detection limit at CGE was 1.48 x 10(-7) M, while at CGCE was 4.6 x 10(-6) M. CGE was successfully applied for the determination of the antioxidant capacity based on GA equivalents for white, rose and red wine samples. (C) 2014 Elsevier B.V. All rights reserved.
Кључне речи:
Gallic acid / Dinuclear copper(II) octaazamacrocyclic complex / PVC matrix / Voltammetric sensorИзвор:
Talanta, 2015, 132, 513-519Издавач:
- Elsevier Science Bv, Amsterdam
Пројекти:
- Вишескално структурирање полимерних нанокомпозита и функционалних материјала применом различитих прекурсора (RS-45022)
- Примена унапређених оксидационих процеса и наноструктурисаних оксидних материјала за уклањање загађивача из животне средине, развој и оптимизација инструменталних техника за праћење ефикасности (RS-172030)
DOI: 10.1016/j.talanta.2014.09.025
ISSN: 0039-9140
PubMed: 25476338