Ultrasound enhanced solid-phase extraction of ultra-trace arsenic on FeO@AuNPs magnetic particles.

Using ultrasound (US) to reduce the agglomeration of magnetic materials has attracted many researchers' attention in the field of magnetic solid phase extraction (MSPE). This paper showed that even the simple magnetic material (FeO@AuNPs) can stimulate excellent arsenic (As) enrichment performance with the assistance of US. Compared with stirring dispersion, the extraction efficiencies of FeO@AuNPs for 0.