Fig. 2From: Preparation of a new coating of graphene oxide/nickel complex on a nickelized metal surface for direct immersion solid phase microextraction of some polycyclic aromatic hydrocarbonsEDX patterns of the prepared A Alu-SPME, B chemically etched Alu-SPME, C Alu-Ni-SPME and D Alu-Ni/GO-SPME fibersBack to article page