Determination of mercury (II) by spectrophotometric method based on self assembly of gold nanoparticles

Subject Areas : Journal of the Iranian Chemical Research

Yan  Du ¹ (College of Chemistry and Environmental Science, Hebei University, Baoding 071002, P.R.. China)
Jing  Yan ² (College of Chemistry and Environmental Science, Hebei University, Baoding 071002, P.R.. China)
Mei  Ni ³ (College of Chemistry and Environmental Science, Hebei University, Baoding 071002, P.R.. China)
Bao  Du ⁴ (College of Chemistry and Environmental Science, Hebei University, Baoding 071002, P.R.. China)

Received: 2011-01-22 Accepted : 2011-03-10 Published : 2011-03-30

Keywords: Spectrophotometer, Gold nanoparticles, Mercury (II), Glutathione,

Abstract :

Due to the binding of the –COO- group with the mercury (II), gold nanoparticlesfunctionalized with glutathione can self-assemble to form a supermolecular network in the HAc-NaAc buffer solution. The aggregation of functionalized gold nanoparticles and mercury (II)caused the shift of maximum absorption peak of the UV-Vis spectrum from 520 nm to 609 nm.Based on this principle, a simple spectrophotometric method for determination of mercury (II)was preliminarily established. The detection limit of the developed method for determination ofmercury (II) was about 8.5×10-8 mol L-1.

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