Determination of Mercury in indoor dust samples by ultrasonic probe microextraction and stripping voltammetry on gold nanoparticles-modified screen-printed electrodes

► Optimization of ultrasonic probe microextraction of Hg(II) using chemometric tools. ► Development of SWASV method at AuNPs-SPE for fast and reliable Hg monitoring. ► ICP-MS and Certified Reference Materials for validating the proposed methodology. ► Application to complex dust samples collected at different indoor ambient.