Analysis of arsenic(V) by cathodic stripping voltammetry

✍ Scribed by U. Greulach; G. Henze

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 561 KB
• Volume: 306
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(94)00681-b

✦ Synopsis

A novel electrochemical stripping approach is presented for the trace measurement of arsenate. It is based on the reduction of As(V) in a mannitol and perchlorate containing solution, the coprecipitation with copper and the voltammetric determination by further reduction to ASH, at the hanging mercury drop electrode. For an accumulation period of 60 s, the detection limit has been found to be 4.4 pg/l; the determination limit was calculated to be 11 pg/l. The method has been applied to the analysis of arsenic in a standard stream sediment and in water samples.