Sensitive spectrophotometric detection of dopamine, levodopa and adrenaline using surface plasmon resonance band of silver nanoparticles

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Hormozi Nezhad, M. R

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Type of Document: Article
DOI: 10.1007/BF03246187
Publisher: 2010
Abstract:
A simple and effective procedure is proposed for spectrophotometric determination of catecholamines; Dopamine (1), L-Dopa (2) and Adrenaline (3). It was found that the reduction of Ag+ to silver nanoparticles (Ag-NPs) by these catecholamines in the presence of polyvinylpyrrolidone (PVP) as a stabilizing agent produced very intense surface plasmon resonance peak of Ag-NPs. The plasmon absorbance of the Ag-NPs allows the quantitative spectrophotometric detection of the catecholamines. The calibration curves derived from the changes in absorbance at λ = 440 nm were linear with concentration of Dopamine, Levodopa and Adrenaline in the range of 3.2×10-6- 2.0x10-5 M, 1.6x10-7 - 1.0×10-5 M, 1.5x10-6- 4.0×10-5 M, respectively. The detection limits (3σ) were 1.2×10-6 M, 8.6 ×10-8 M, 9.7 ×10-7 M for the Dopamine, L-Dopa and Adrenaline, respectively. The method was applied successfully to the determination of catecholamines in Ringer's injection serum
Keywords:
Catecholamines ; Silver nanoparticles ; Spectrophotometric determination ; Surface plasmon band
Source: Journal of the Iranian Chemical Society ; Volume 7, Issue SUPPL. 1 , 2010 , Pages S83-S91 ; 1735207X (ISSN)
URL: http://link.springer.com/article/10.1007/BF03246187