Resonance Rayleigh Scattering Spectral Method for Trace Fe³⁺ Using 1, 4-Dithiothreitol-Modified Nanogold as Probe

Abstract:

1, 4-dithiothreitol (DTT) combined with nanogold (AuNP) to form the DTT-AuNP probe in the solution of 1.0 mmol/L H₂SO₄. In the presence of Fe³⁺, the DTT-AuNPs aggregated to big particles that exhibited a maximum Resonance Rayleigh scattering (RRS) peak at 770 nm. Under the chosen conditions, the increased intensity was linear to Fe³⁺ concentration in the range of 7.3-149.5µg/L, with the regression equation of ΔI770nm = 127.5C +11.2, the correlation coefficient of 0.9954 and the detection limit of 3.75 ug/L Fe³⁺. The proposed method was applied to detect trace Fe³⁺ in water samples, with satisfactory results.

• Periodical: Applied Mechanics and Materials (Volumes 260-261)
• Pages: 701-706
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.260-261.701
• Online since: December 2012
• Authors: Gui Qing Wen, Liang Qin Wu, Zhi Liang Jiang
• Keywords: 1, 4-Dithiothreitol, Fe³⁺, Nanogold, Resonance Rayleigh Scattering Spectral Method

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