Improved liquid–liquid extraction by modified magnetic nanoparticles for the detection of eight drugs in human blood by HPLC-MS Posted on May 2, 2022May 2, 2022 By Becky Carter Feiyu Yang, Ke Ma, Yu Caoa, Chunfang Nia RSC Adv; 11; 2021 Access article Chemistry, Seized Drugs/Controlled Substances, Toxicology