Abstract
The authors report on a method for visual and spectrophotometric determination of silver (I) by using Prussian Blue nanoparticles (PB NPs) as a colorimetric probe. It is based on the finding that the blue PB NPs are converted into colorless silver ferrocyanide ions in the presence of Ag(I) due to the establishment of a dissolution-precipitation equilibrium. The change in absorbance at 700 nm is related to the concentration of Ag(I) in the range from 0.01 to 3 μM. The visual detection limit is 3 μM. The assay has a good selectivity for Ag(I) over other common ions. It was successfully applied to the determination of Ag(I) in spiked samples of river and lake waters.
Schematic presentation of a visual and spectrophotometric method for determination of silver(I) by using Prussian Blue nanoparticles (PB NPs) as optical probes.
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Acknowledgements
The support of this research by the Foundation of Science and Technology Department of Sichuan Province (Grant No. 2015JY0053), Doctoral Program of Southwest University of Science and Technology (Grant No. 14zx7165), Natural Science Foundation of Chongqing Municipal Science and Technology Commission (project number cstc2015jcyjBX0123) and Open Foundation of Chongqing Key Laboratory of Environmental Materials and Remediation Technology (CEK1505) is gratefully acknowledged.
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Huang, W., Liang, Y., Deng, Y. et al. Prussian Blue nanoparticles as optical probes for visual and spectrophotometric determination of silver ions. Microchim Acta 184, 2959–2964 (2017). https://doi.org/10.1007/s00604-017-2328-7
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DOI: https://doi.org/10.1007/s00604-017-2328-7