Abstract
Bismuth (0–120 μg) can be determined spectrophotometrically at 495 nm after its adsorptive extraction as 1-naphthylmethyltriphenylphosphonium tetraiodobismuthate(III) on microcrystalline benzophenone and dissolution of the solid phase in dichloromethane. The effects of reagent conditions, diverse ions and masking studies are reported. The system has been applied to the determination of bismuth in a range of copper-based alloys and pharmaceutical samples.
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