A new analytical procedure for simultaneous voltammetric metal determinations in sea water, sediments, algae and fishes

A new accurate and precise method for simultaneous determination of Cu(II), Pb(II), Cd(II), Zn(II) NI(II), Co(II), Fe(III) and Mn(II) is applied to th e samples drawn in the Gore Bay. Such analytical procedure entails the empl oyment of highly reactive solutions of concentrated perchloric-hydrofluoric acids (sediments), concentrated chloridric-nitric-sulphuric acids (algae a nd fishes) and of Differential Pulse Voltammetry (DPV) as instrumental tech nique, using ammonia-ammonium chloride buffer solution (pH 9.1) as supporti ng electrolyte. The accuracy and the precision, expressed as relative error and relative standard deviation, respectively, were in all cases lower tha n 6 %.