Automated magnetic sorbent extraction based on octadecylsilane functionalized maghemite magnetic particles in a sequential injection system coupled with electrothermal atomic absorption spectrometry for metal determination

► ODS-Fe2O3 as magnetic sorbent material for metal preconcentration. ► Automatic sequential injection magnetic solid phase extraction coupled with ETAAS. ► Effective on-line column packing using two neodymium magnets; no frits were needed. ► Cadmium determination in environmental samples.