“…Several methods commonly used for the preconcentration of mercury are based on gold, silver or alloys, 13,38,39 purge and trap injection, 9,40 liquid-liquid extraction, [41][42][43] co-precipitation, 13,15 solid-phase extraction 17,21,44,45 and solid-phase microextraction. 46,47 Moreover, the solid-phase extraction cartridges and disks modied by suitable ligands such as dithiocarbamate, 15,48 dithizone, 20,22,44 diethyldithiocarbamate, 40,49 dipyridylcarbamate, histidine, thioanilide, 15 imidazole or 6-mercaptopurine 15,39,40 have been successfully used for the selective separation and determination of mercury. Nevertheless, the most popular techniques used for the preconcentration of mercury are liquid-liquid extraction and solid-phase extraction.…”