SIMULTANEOUS DETERMINATION OF TRACE AMOUNTS OF ZN(II), CD(II), PB(II) AND CU(II) IN THE CAU RIVER VALLEY’S SEDIMENT SAMPLES IN THAI NGUYEN CITY.

Abstract

             Zinc and copper among micro-quantity elements are necessary for human body, but only with a certain content, beyond the allowed content, they become dangerous, cause complications, and have harmful effects on human health. Lead and Cadmium are among few elements which are un-useful for human body; moreover, with the exceed of allowed content, they also pose a threat to the safety of human life. The differential pulse anodic stripping volammetry (DPASV) using hanging mercury drop electrode was applied for simultaneous determination of cadmium, lead and copper in various analyzed objects. Under suitable conditions, the differential pulse anodic stripping volammetry has high recovery and low detection limit (0.175 ppb for Zinc; 0.275 ppb for Cadmium, 0.254 ppb for Lead and 0.340 ppb for Copper). The method has been successfully applied for the simultaneous determination of Zn(II), Cd(II), Pb(II) and Cu(II) in sediment samples the Cau River valley of Thai Nguyen City area resulting a satisfactory repetition level and low error in permitting limit.