Thiol-functionalized magnetic biochar as an efficient sorbent for magnetic dispersive micro-SPE coupled with ICP-MS determination of Pb( ii ), Cd( ii ), and Hg( ii ) in environmental waters

A thiol-functionalized magnetic biochar enables rapid magnetic dispersive micro-solid-phase extraction of Pb( ii ), Cd( ii ), and Hg( ii ) from water samples, followed by ultra-trace determination using ICP-MS.