In-situ differential pulse anodic stripping voltammetry combined with hollow fiber-based liquid-three phase micro extraction for determination of mercury using Au-nanoparticles sol-gel modified Pt-wire

► A new method developed based on hollow fiber-based microextraction and in-situ determination. ► In-situ anodic stripping voltammetry was developed for Hg(II) determination. ► An enrichment factor of 277 was achieved for Hg(II) in water samples. ► Hg(II) can be measured at ultra trace level as low as 6.0×10−11 mol L−1.