Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2009 Oct 27;653(2):207-11.
doi: 10.1016/j.aca.2009.09.017. Epub 2009 Sep 17.

A sensitive resonance light scattering spectrometry of trace Hg2+ with sulfur ion modified gold nanoparticles

Ya Fan  1 , Yun Fei Long, Yuan Fang Li
Affiliations

A sensitive resonance light scattering spectrometry of trace Hg2+ with sulfur ion modified gold nanoparticles

Ya Fan et al. Anal Chim Acta. .

Abstract

A new resonance light scattering (RLS) spectrometric method for mercury ions (Hg(2+)) in aqueous solutions with sulfur ion (S(2-)) modified gold nanoparticles (Au-NPs-S) has been developed in this contribution. It was found that S(2-) at the surface of Au-NPs resulting from the surface modification can interact with Hg(2+) to form very stable S-Hg-S bonds when Hg(2+) concentration is lower than that of S(2-), resulting in the aggregation of Au-NPs-S and causing enhanced RLS signals. The enhanced RLS intensities (DeltaI(RLS)) characterized at 392 nm were found to be proportional to the concentration of Hg(2+) in the range of 0.025-0.25 micromol L(-1) with a detection limit (3sigma) of 0.013 micromol L(-1). Our results showed that this approach has excellent selectivity for Hg(2+) over other substances in aqueous solutions.

PubMed Disclaimer

Publication types