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A Dithiothreitol-Modified Nanogold Resonance Rayleigh Scattering Spectral Probe for Detection of Trace Cr(VI)

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Abstract:

Cr(VI); dithiothreitol; Nanogold; Resonance Rayleigh scattering spectral assay. Abstract. Nanogold (NG) in size of 15 nm was prepared by sodium citrate procedure, and it was modified by 1,4-dithiothreitol (DTT) to form NG-DTT probe for Cr(VI). In diluted H2SO4 medium, the probe interacted with Cr(VI) to form big NG clusters that led to the resonance Rayleigh scattering (RS) peak at 720 nm increased greatly. Under the selected conditions, the increased RS intensity (ΔI720nm) is linear to Cr(VI) concentration in the range of 10-50 nmol/L, with a regression equation of ΔI720nm= 2.05 C-7.5, coefficient of 0.9989, and a detection limit of 5 nmol/L. This nanogold RS method was applied to determination of Cr(VI) in waste water samples, with satisfactory results.

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Periodical:

Advanced Materials Research (Volume 668)

Pages:

370-374

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.668.370

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Online since:

March 2013

Authors:

Jin Qiao Long, Li Li Xu, Bin Chen, Ai Hui Liang, Zhi Liang Jiang

Keywords:

Cr(VI), Dithiothreitol, Nanogold, Resonance Rayleigh Scattering Spectral Assay

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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