Resonance Rayleigh Scattering Spectral Determination of As(V) Using Cu(II) as Catalyst

Gui Qing Wen; Ai Hui Liang

doi:10.4028/www.scientific.net/AMR.788.23

Paper Titles

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A Review on the Binary Oxide Nanomaterials for the Electrochemical Performance
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Surface-Enhanced Raman Scattering Determination of Trace Phenanthroline Using Aggregated-Nanosilver as Substrate
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Nanogold Resonance Rayleigh Scattering Determination of Trace Cr³⁺
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Resonance Rayleigh Scattering Spectral Determination of As(V) Using Cu(II) as Catalyst
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Study of Deoxidization and Desulphurization in Slag Washing Process of Al-Killed Steel
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Studies on Solid Solution of Fe₅₀-Cu₅₀ Compounds by Mechanical Alloying
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Experimental Research on Vacuum Diffusion Bonding of AS-Extruded AZ61 Magnesium Alloy
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Analysis on Effects of Strain Rate to Dynamic Recrystallization Process of Metals by 2-D CA Model
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Resonance Rayleigh Scattering Spectral Determination of As(V) Using Cu(II) as Catalyst

Abstract:

In HCl medium and in the presence of CuSO₄, Na₃AsO₄ can be reduced by NaH₂PO₂ to form As nanoparticles (AsNs) which exhibited a strong resonance Rayleigh scattering (RRS) peak at 370 nm. Under the chosen conditions, the increased intensity at 370 nm was linear to As⁵⁺ concentration in the range of 0.48-38.0×10^-6mol/L, with a regression equation of ΔI_370nm = 82.3 C_As + 33.9, a correlation coefficient of 0.9878 and a detection limit of 2.0×10^-7mol/L As⁵⁺. The proposed method was applied to detect As⁵⁺ concentration in waste water, with simplicity, rapidity and accuracy. Thus, a novel RRS spectral method was established to determine As⁵⁺.