Nanogold Resonance Rayleigh Scattering Method for NO₂^- Based on the Phenylenediamine Diazotization

Abstract:

There are strong forces between phenylenediamine (PPD) and nanogold particle (AuNP) that make the AuNPs aggregation and exhibit a strong resonance Rayleigh scattering (RRS) peak at 368 nm. When there is NO₂-, it reacts with PPD to generate an azo compound. However, there is weak force between AuNP and the azo compound that can’t make the AuNPs aggregation. When concentration of NO₂- increased, the AuNP aggregations become weak that led the RRS peak to decrease. The decreased RRS intensity is linear to NO₂-concentration in the range of 1-25 μmol/L. This method was applied to analysis of water samples with simplicity.

• Periodical: Advanced Materials Research (Volumes 631-632)
• Pages: 22-25
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.631-632.22
• Online since: January 2013
• Authors: Zhi Liang Jiang, Jin Chao Dong, Ai Hui Liang
• Keywords: Nanogold, NO₂^-, Phenylenediamine, Resonance Rayleigh Scattering Spectral Method

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