▎ 摘　　要

The aim of this study is to evaluate the extraction capacity of a new functionalized magnetic graphene oxide (MGO) to be employed in the automatic simultaneous preconcentration-determination of a relatively large number of elements with different properties by inductively coupled plasma optical emission spectrometry (ICP OES). A multimode sample introduction system (MSIS) cyclonic spray chamber was employed to generate and introduce vapours of Ag, Au, Ir, Os, Pd, Pt, Sb and Hg in the ICP torch. Several flow and chemical variables were optimized by two multivariate central composite designs. Detection limits between 0.05 mu g L-1 for Hg, and 2.6 mu g L-1 for Pd, and enrichment factors between 3 for Hg, and 33 for Os were obtained with a precision