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Determination of silver ions based on the electrogenerated chemiluminescence of silver ions/peroxydisulfate

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Abstract

In this work, a simple, sensitive, and selective method for the determination of silver ions (Ag+) was proposed on the basis of the enhancement of Ag+ on the electrogenerated chemiluminescence (ECL) of peroxydisulfate (S2O8 2−), which can be attributed to the obvious electrocatalytic reduction of S2O8 2− by Ag+, giving rise to more abundant sulfate radical anion (SO4 •−). Under optimal conditions, a linear range from 4 to 500 nM (R = 0.997) with a detection limit of 2.5 nM (S/N = 3) was achieved for the detection of Ag+. The Ag+/S2O8 2− ECL system could not only provide an assay protocol for the determination of Ag+ but also offer an effective way to enhance the ECL of S2O8 2−, which may act as a promising platform for the detection of other species such as 4-chlorophenol.

ECL-potential curves of 0.1 M PBS (pH 8.5) containing (a) 500 nM AgNO3, (b) 50 mM K2S2O8, (c) 500 nM AgNO3 and 50 mM K2S2O8

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Acknowledgments

This work is supported by the National Natural Science Foundation of China (No. 21345004), Foundation for Innovation Team of Bioanalytical Chemistry, and the Project Sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry.

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Authors and Affiliations

  1. Anhui Key Laboratory of Chemo-biosensing, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui, 241000, China

    Haiyan Wang, Xinxin Fan & Yan Wang

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  1. Haiyan Wang
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  2. Xinxin Fan
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  3. Yan Wang
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Correspondence to Haiyan Wang.

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The authors declare that they have no conflict of interest.

Additional information

Published in the topical collection Analytical Electrochemiluminescence with guest editors Hua Cui, Francesco Paolucci, Neso Sojic, and Guobao Xu.

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Wang, H., Fan, X. & Wang, Y. Determination of silver ions based on the electrogenerated chemiluminescence of silver ions/peroxydisulfate. Anal Bioanal Chem 408, 7113–7119 (2016). https://doi.org/10.1007/s00216-016-9640-7

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  • DOI: https://doi.org/10.1007/s00216-016-9640-7

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