A new voltammetric method for the simultaneous monitoring of heavy metals in sea water, sediments, algae and clams: application to the goro bay ecosystem

摘要

Arsenic (Ⅲ), selenium (Ⅳ), copper(Ⅱ), lead(Ⅱ), zinc (Ⅱ) have been determ- ined in sea water, sediments, algae and clams by differential pulse cathodic (DPCSV) and anodic (DPASV) stripping voltammetry. The voltammetric measurements are carried out suing a conven- tional three-electrode cell and the ammonia-ammonium chloride buffer pH 9.2 as supporting electro- lyte. The analytical procedure has been verfied by the analysis of the standard reference materials (Estuarine Sediment BCR-CRM 277, Ulva Lactuca BCR-CRM 279 and Mussel Tissue BCR-CRM 278). The precision and the accuracy are less than 5/100. This procedure is utilized for the monitoring of heavy metals in the Po river mouth area (Italy).