Abstract
In 0.1 mol/L HCl medium and the presence of 0.3% glycerin as stabilizer, selenium (Ⅳ) was reduced by thiourea to form selenium nanoparticles, which exhibited a strong resonance Rayleigh scattering (RRS) peak at 366 nm. The RRS peak intensity increased when selenium (Ⅳ) increased. The increased RRS intensity at 366 nm (ΔI366nm) was proportional to the selenium (Ⅳ) concentration (C) from 1 to 32 μg/L, with a regression equation of ΔI366nm= 222.99 C+74.69, and detection limit of 1.19 ng/L. This proposed method was applied to detect selenium in samples, with satisfactory results.
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