Please use this identifier to cite or link to this item:
|Title:||Catalytic-Adsorptive Stripping Voltammetric Determination of Chromium in Environmental Materials|
|Authors:||Gao, Z. |
|Keywords:||Catalytic-adsorptive stripping voltammetry|
|Source:||Gao, Z.,Siow, K.S. (1996-06). Catalytic-Adsorptive Stripping Voltammetric Determination of Chromium in Environmental Materials. Electroanalysis 8 (6) : 602-606. ScholarBank@NUS Repository.|
|Abstract:||Trace levels of chromium in natural water, soil and plants can be determined directly after accumulation of the chromium(III)-2,2-bipyridine complex on a hanging mercury drop electrode, coupled with the catalytic effect of the adsorbed complex on the reduction of nitrite. The adsorptive-catalytic characteristic of the complex provides the needed sensitivity and selectivity for direct determination of ultratrace concentrations of chromium in environmental samples. The effect of various experimental parameters on the catalytic current was investigated. Under optimal conditions, the adsorptive-catalytic stripping voltammetric procedure produces a detection limit of 20 pM (1.0 ppt) chromium and a linear catalytic current-chromium concentration relationship up to 50nM, following 5 s of accumulation. Most of the coexisting metals do not interfere with the measurements.|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Apr 20, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.