A novel hydride generation spectral method for trace Se based on resonance Rayleigh scattering of Cu2O–Se nanoparticles

Abstract

Se(IV) was reduced by NaBH₄ to form SeH₂ gas that reduces Cu(II) to produce Cu₂O–Se particles with a strong resonance Rayleigh scattering (RRS) peak at 374 nm. The RRS intensity was linear to the Se(IV) concentration from 0.008 to 1.5 mg L⁻¹, with a detection limit of 3.3 μg L⁻¹.