Selective determination of gold(III) ion using CuO microsheets as a solid phase adsorbent prior by ICP-OES measurement

► Selective detection of gold(III) ion based on un-doped CuO Microsheets. ► CuO microsheets used as a selective solid phase adsorbent. ► The static adsorption capacity for gold(III) was calculated to be 57.0 mg g−1. ► Adsorption process was mainly monolayer based onto a surface containing a finite number of adsorption sites.