Format:
Online-Ressource
ISSN:
1521-4109
Content:
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 50 nM, following 5 s of accumulation. Most of the coexisting metals do not interfere with the measurements.
In:
volume:8
In:
number:6
In:
year:2005
In:
pages:602-606
In:
extent:5
In:
Electroanalysis, Weinheim : Wiley-VCH-Verl., 1989-, 8, Heft 6 (2005), 602-606 (gesamt 5), 1521-4109
Language:
English
DOI:
10.1002/elan.1140080619
URN:
urn:nbn:de:101:1-2023122107125189478751
URL:
https://doi.org/10.1002/elan.1140080619
URL:
https://nbn-resolving.org/urn:nbn:de:101:1-2023122107125189478751
URL:
https://d-nb.info/131426950X/34
URL:
https://doi.org/10.1002/elan.1140080619
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