A carbon paste electrode modified with poly(methylene disulfide) nanoparticles for anodic stripping voltammetric determination of silver(I)
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Poly(methylene disulfide) nanoparticles (PMDSNPs) were synthesized and characterized by FTIR, FESEM, EDX, and TGA. The nanomaterial was used to modify a carbon paste electrode to obtain a sensor for differential pulse anodic stripping voltammetric analysis of silver ion. The silver ions are accumulated on the modified electrode by reduction at a potential of −0.3 V. This is followed by the quantitation of adsorbed Ag(I) by differential pulse anodic stripping voltammetry. Under optimized conditions, the electrode has a dynamic range in the 3.0 × 10−12 to 1.0 × 10−9 mol L−1 Ag(I) concentration range, and the detection limit is 1.0 × 10−13 mol L−1. The relative standard deviation (for n = 6) is 1.8%, this showing good reproducibility. The method was successfully applied to the determination of Ag(I) in spiked tap and river waters and tea leaves. The results were in good agreement with those obtained by inductively coupled plasma optical emission spectrometry.
KeywordsNanomaterial Thiokol Cyclic voltammetry Differential pulse voltammetry Tea leaves Student-t test
This manuscript was extracted from the Ph.D. thesis of Seyedeh Mina Ghalebi. The financial support of this work by Islamic Azad University, Iran, Mahshahr branch, is greatly appreciated.
Compliance with ethical standards
The author(s) declare that they have no competing interests.
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