In:
Electroanalysis, Wiley, Vol. 21, No. 17-18 ( 2009-09), p. 1961-1969
Abstract:
This paper presents an enhanced adsorptive stripping voltammetric procedure (AdSV) for the determination of Pb 2+ , which relies on the accumulation of the metals at a calixarene‐based chemically modified bismuth‐film electrode on glassy carbon substrate. Following the accumulation of the target metals at open circuit and a medium exchange, both the square wave anodic stripping detection of the metal ions and the in situ bismuth‐film formation was performed simultaneously in a Bi 3+ containing supporting electrolyte. The analysis of Pb 2+ under optimized conditions resulted in stripping responses with good linearity (in the range 0.05–0.6 μM) and precision ( RSD =1.12% at 0.2 μM Pb 2+ ; n =10) and low detection limit (0.02 μg/L at 10 min preconcentration). The determination of Pb 2+ (0.4 μM) at 100‐fold excess of interfering ions (Cd 2+ , Cu 2+ and Zn 2+ ) yielded well resolved lead signal. The analytical utility of the method elaborated was tested in the analysis of trace Pb 2+ in environmental water samples.
Type of Medium:
Online Resource
ISSN:
1040-0397
,
1521-4109
DOI:
10.1002/elan.v21:17/18
DOI:
10.1002/elan.200904634
Language:
English
Publisher:
Wiley
Publication Date:
2009
detail.hit.zdb_id:
1483564-2
detail.hit.zdb_id:
384877-2
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