A new resonance Rayleigh scattering method for trace Pb, coupling the hydride generation reaction with nanogold formation†
Abstract
Pb2+ was oxidized to Pb4+ and was reduced to PbH4 gas by NaBH4, and the gas was reacted with Au3+ to form nanogold that exhibited a resonance Rayleigh scattering effect at 286 nm. Based on this, 0.2 × 10−6–33.6 × 10−6 mol L−1 Pb can be detected, with a detection limit of 7.0 × 10−8 mol L−1.