title: Trace mercury ion determination based on the highly selective redox reaction between stannous ion and mercury ion enhanced by gold nanoparticles.
abstract: A novel resonance light scattering (RLS) spectrometric method for mercury ions (Hg(2+)) determination has been established in this article. Mercury (Hg) nanoparticle formed from the highly selective redox reaction between citrate-stabilized stannous ions (Sn(2+)) and Hg(2+). As a result, the RLS intensities of the system can be enhanced and it can be sensitized in the presence of very little amount of gold nanoparticles (AuNPs). According to this phenomenon, trace Hg(2+) in real water sample has been determined directly by RLS spectrometry. It has been found that the enhanced RLS intensities (ΔI(RLS)) characterized at 395 nm are proportional to the concentration of Hg(2+) in the range of 0.1-30 μmol L(-1) with a detection limit (3σ) of 0.051 μmol L(-1). The method described herein has good sensitivity, selectivity, and without complicated sample pretreatment. Moreover, the feasibility for the analysis of Hg(2+) in a wastewater sample was identified with a good recovery (100.2-106.3%).
authors.affiliation: Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education of China, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China.
authors.forename: Pingping
authors.initials: P
authors.lastname: Zhang
authors.forename: Shu
authors.initials: S
authors.lastname: Chen
authors.forename: Yangfang
authors.initials: Y
authors.lastname: Kang
authors.forename: Yunfei
authors.initials: Y
authors.lastname: Long
mesh_terms: D002413:Cations, Divalent / Q000032:analysis*; D006046:Gold / Q000737:chemistry*; D008027:Light; D057230:Limit of Detection; D008628:Mercury / Q000032:analysis*; D053768:Metal Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction; D012542:Scattering, Radiation; D013053:Spectrophotometry / Q000379:methods*
chemical_list: D002413:Cations, Divalent; D006046:Gold; D008628:Mercury