Abstract
The nanogold catalysis effect on the reaction between HAuCl4 and Vitamin C (VC) was studied by resonance Rayleigh scattering (RS) spectroscopy at 540 nm, and a simple, rapid RS spectral method was established to determine VC. Under the chosen conditions, the increased intensity at 540 nm was linear to the VC concentration in the range of 7×10-6-2.8×10-4mol/L, with a regression equation of ΔI540 = 2.98 CVC + 13.4, a correlation coefficient of 0.9909 and a detection limit of 2×10-6 mol/L VC. The proposed method was applied to detect VC content in VC tablets and beverage samples, with simplicity, rapidity and accuracy.
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