Journal
MICROCHIMICA ACTA
Volume 184, Issue 8, Pages 2959-2964Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-017-2328-7
Keywords
Colorimetic probe; Transmission electron microscopy; Deaggregation of nanoparticles; Water analysis; Environmental analysis
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Funding
- Foundation of Science and Technology Department of Sichuan Province [2015JY0053]
- Doctoral Program of Southwest University of Science and Technology [14zx7165]
- Natural Science Foundation of Chongqing Municipal Science and Technology Commission [cstc2015jcyjBX0123]
- Open Foundation of Chongqing Key Laboratory of Environmental Materials and Remediation Technology [CEK1505]
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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 mu M. The visual detection limit is 3 mu M. 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.
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