Enhanced-Oxidation and Highly Sensitive Detection of Tartrazine in Foodstuffs via New Platform Based on Poly(5-Sulfosalicylic Acid)/Cu(OH)2 Nanoparticles
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Poly(5-sulfosalicylic acid) (PSSA)/Cu(OH)2 nanoparticle–graphite (Gr) nanocomposite-modified glassy carbon electrode (PSSA/Cu(OH)2–Gr/GCE) was utilized for sensitive determination of tartrazine using squarewave voltammetry (SWV). The structure of the nanocomposite was investigated by transmission electron microscopy (TEM) and field emission scanning electron microscopy (FESEM(. PSSA/Cu(OH)2–Gr/GCE exhibited an enhancement in anodic peak current, electron transfer kinetics, effective surface area, and reactive sites and indicated good electrocatalytic activity toward the oxidation of tartrazine. The as-proposed modified electrode achieved a satisfactory dynamic range between the anodic peak current and the concentration of tartrazine at two concentration ranges of 0.01–0.6 and 0.6–10 μmol/L, and the detection limit was obtained to be 8 nmol/L (S/N = 3). The resulting sensor was successfully used to determine tartrazine in real samples such as candy, softdrink, orange juice powder, banana-flavored jelly powder, and candy-coated chocolate.
KeywordsPoly(5-sulfosalicylic acid) Cu(OH)2 nanoparticles Nanocomposite Electrochemical sensor Tartrazine
The authors are thankful to the post-graduate office of Guilan University for the support of this work.
Compliance with Ethical Standards
This study was funded by Guilan University.
Conflict of Interest
M. Arvand declares that he has no conflict of interest. A. Ashoori declares that she has no conflict of interest. Sh. Hemmati declares that she has no conflict of interest.
All procedures performed in studies were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. This article does not contain any studies with human or animal subjects performed by any of the authors.
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