Facile preparation of glutathione-stabilized gold nanoclusters for selective determination of chromium (III) and chromium (VI) in environmental water samples

► Facile and rapid preparation of fluorescent glutathione-stabilized gold nanoclusters. ► New method for selective determination of Cr(III) and Cr(VI) using GSH-Au NCs. ► The detection method possessed simplicity, high throughput, high selectivity and sensitivity.