TITLE

Determination of subnanomolar concentrations of cobalt by adsorptive stripping voltammetry at a bismuth film electrode

AUTHOR(S)
Korolczuk, Mieczyslaw; Moroziewicz, Aleksandra; Grabarczyk, Malgorzata
PUB. DATE
August 2005
SOURCE
Analytical & Bioanalytical Chemistry;Aug2005, Vol. 382 Issue 7, p1678
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Procedures for trace cobalt determinations by adsorptive stripping voltammetry at in situ and ex situ plated bismuth film electrodes are presented. These exploit the enhancement of the cobalt peak obtained by using the Co(II)–dimethylglyoxime–cetyltrimethylammonium bromide–piperazine- N, N′-bis(2-ethanesulfonic acid) system. The calibration graph for an accumulation time of 120 s was linear from 2 × 10–10 to 2 × 10–8 mol L−1. The relative standard deviation from five determinations of cobalt at a concentration of 5 × 10–9 mol L−1 was 5.2%. The detection limit for an accumulation time of 300 s was 1.8 × 10–11 mol L−1. The proposed procedure was applied to cobalt determination in certified reference materials and in tap and river water samples.
ACCESSION #
17719851

 

Related Articles

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics