Sample pretreatment is an important process in environmental analysis, which directly influences the accuracy of analysis and strongly determines the detection limits of target pollutants. Magnetic solid phase extraction(MSPE) is a novel technology for sample pretreatment with the advantages of easy operation, short consumption time and low cost. MSPE overcomes the shortages of conventional column-type solid phase extraction(SPE) and thus has been widely applied in the fields of environmental, chemical, bio...