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Updated: Jun 27, 2026

Rapid Nanoprobe Signal Enhancement by In Situ Gold Nanoparticle Synthesis
Published on: March 7, 2018
A new and selective and sensitive nanogold-labeled immunoresoance scattering spectral assay for trace prealbumin
Ming Hou1, Shuangjiao Sun, Zhiliang Jiang
1Department of Material and Chemical Engineering, Guilin University of Technology, Guilin 541004, China.
Abstract:
A gold-labeled immunoresonance scattering spectral probe for trace prealbumin (PA) was prepared by using gold nanoparticles in size of 9.0nm to label goat anti-human prealbumin polyclonal antibody. The immune reaction between the gold-labeled antibody and prealbumin took place in pH 7.6 Na(2)HPO(4)-NaH(2)PO(4) buffer solution. In the presence of polyethylene glycol PEG-10000, the labeled gold nanoparticles were released and aggregated which brought the resonance scattering intensity (I(RS)) at 580nm to enhance greatly. The DeltaI(RS) is proportional to the prealbumin concentration in the range from 16.67 to 666.67ng/mL, with a detection limit of 4.1ng/mL. This simple, sensitive and selective assay was applied to determination of prealbumin in human plasma, with satisfactory results.
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