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- W2042544562 abstract "A rapid and sensitive colorimetric sensing strategy employing silver nanoparticles (AgNPs) to detect trace Hg2+ in aqueous solutions is described. The citrate-capped AgNPs were functionalized to form a Tween 20-stabilized AgNPs (Tween 20-AgNPs) probe, which was stable in a high ionic strength environment. When Hg2+ was present in the aqueous solution, citrate reduced Hg2+ to Hg0 and formed a Ag/Hg amalgam with the AgNPs, followed by the removal of Tween 20 from the surface of the AgNPs. The AgNPs were unstable in high ionic strength solutions, resulting in AgNPs aggregation and co-stabilization with Hg2+, observed by a decrease in the UV-vis absorption. This decrease in the UV-vis absorption was proportional to the concentration of Hg2+. Under optimized conditions, the sensing system exhibited a linear range of 5.0 × 10−10 to 1.2 × 10−7 M for Hg2+, with a detection limit of 0.31 nM in buffer. The co-stabilization assays showed no Hg2+ was detected to be remaining in solution using our proposed method. The AgNPs removal percentage was correlated well with the concentration of Hg2+ with a correlation coefficient of 0.99862. When the concentration of Hg2+ was in excess, the AgNPs removal percentage correlated with the concentration of AgNPs with a correlation coefficient 0.994 as well. Moreover, this probe was successfully used to detect and co-stabilize Hg2+ in tap water, spring water, and surface water samples." @default.
- W2042544562 created "2016-06-24" @default.
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- W2042544562 date "2014-10-29" @default.
- W2042544562 modified "2023-10-17" @default.
- W2042544562 title "Ultrasensitive detection and co-stability of mercury(<scp>ii</scp>) ions based on amalgam formation with Tween 20-stabilized silver nanoparticles" @default.
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- W2042544562 doi "https://doi.org/10.1039/c4ra07621d" @default.
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