Resonance Rayleigh Scattering Spectra, Non-Linear Scattering Spectra of Congo Red-Copper(II)-Protein System and Its Analytical Application

2014 ◽  
Vol 26 (20) ◽  
pp. 6751-6757
Author(s):  
Qiang Li ◽  
Zhong-Rong Song ◽  
Rui Yuan ◽  
Jia-Hong He ◽  
Qiang Xu
Keyword(s):  
Congo Red ◽  
Rayleigh Scattering ◽  
Analytical Application ◽  
Resonance Rayleigh Scattering ◽  
Protein System ◽  
Non Linear ◽  
Scattering Spectra

Resonance Rayleigh Scattering Spectra Property of Selenium Nanoparticles and its Analytical Application

2013 ◽  
Vol 664 ◽  
pp. 736-740
Author(s):  
Ai Hui Liang ◽  
Shan Shan Huang ◽  
Zhi Liang Jiang
Keyword(s):  
Detection Limit ◽  
Rayleigh Scattering ◽  
Regression Equation ◽  
Selenium Nanoparticles ◽  
Analytical Application ◽  
Resonance Rayleigh Scattering ◽  
Strong Resonance ◽  
Peak Intensity ◽  
Scattering Spectra ◽  
Hcl Medium

In 0.1 mol/L HCl medium and the presence of 0.3% glycerin as stabilizer, selenium (Ⅳ) was reduced by thiourea to form selenium nanoparticles, which exhibited a strong resonance Rayleigh scattering (RRS) peak at 366 nm. The RRS peak intensity increased when selenium (Ⅳ) increased. The increased RRS intensity at 366 nm (ΔI366nm) was proportional to the selenium (Ⅳ) concentration (C) from 1 to 32 μg/L, with a regression equation of ΔI366nm = 222.99 C+74.69, and detection limit of 1.19 ng/L. This proposed method was applied to detect selenium in samples, with satisfactory results.

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