A Nanosilver Resonance Rayleigh Scattering Method for the Determination of Trace Cysteine

Xin Hui Zhang; Yan Yan Wei; Chi Zhang; Miao Miao Chi; Jian Zhang; Ai Hui Liang

doi:10.4028/www.scientific.net/AMR.664.741

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 664A Nanosilver Resonance Rayleigh Scattering Method...

A Nanosilver Resonance Rayleigh Scattering Method for the Determination of Trace Cysteine

Abstract:

Using PEG-10000 and sodium citrate as stabilizer, and NaBH₄ as reducer, a stable nanosilver (AgNPs) sol was prepared. In pH 6.6 phosphate buffer solution containing NaCl, the AgNPs were aggregated to large particles, which lead to resonance Rayleigh scattering (RRS) peak at 350 nm enhancement. Upon addition of cysteine, the peak decreased. The decreased value ΔI is linear to cysteine concentration in the range of 5.0×10^-8-6.0×10^-7 mol/L. Thus, a new RRS method was proposed for detection of cysteine.

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Periodical:

Advanced Materials Research (Volume 664)

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741-745

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https://doi.org/10.4028/www.scientific.net/AMR.664.741

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February 2013

Authors:

Xin Hui Zhang, Yan Yan Wei, Chi Zhang, Miao Miao Chi, Jian Zhang, Ai Hui Liang

Keywords:

Cysteine, Nanosilver, Resonance Rayleigh Scattering

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