MERCURY IN AQUEOUS SAMPLES AND EXTRACTS

2.1 Standards and samples are made 0.1 M in Cl and are rendered electrically - conductive by adding concentrated hydrochloric acid (HCL) or solid sodium chloride (NaCl). Hg(II) is quantified by anodic stripping, at a potential of +500 mV with respect to an saturated calomel electrode (SCE), from a gold metal film deposited on a glassy carbon electrode (GCE).