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Anodic stripping voltammetric determination of traces and ultratraces of thallium at a graphite microelectrode: method development and application to environmental waters

Spano, Nadia and Panzanelli, Angelo and Piu, Paola Costantina and Pilo, Maria Itria and Sanna, Gavino and Seeber, Renato and Tapparo, Andrea (2005) Anodic stripping voltammetric determination of traces and ultratraces of thallium at a graphite microelectrode: method development and application to environmental waters. Analytica Chimica Acta, Vol. 553 (1-2), p. 201-207. ISSN 0003-2670. Article.

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DOI: 10.1016/j.aca.2005.08.003

Abstract

A bare graphite microelectrode was used for the anodic stripping voltammetry determination of traces and ultratraces of Tl+ ion in aqueous solutions at pH 3.5, in the presence of a 1 × 10−3 mol L−1 EDTA solution. The proposed method, validated and tested at ultratrace level in environmental water samples, showed low detection and quantification limits (0.01 and 0.03 μg L−1, respectively) and excellent capability to determine the analyte also in the presence of a very high excess of interfering ions, i.e. 2200:1 and 10,000:1 (w:w) for Pb2+ and Cd2+, respectively. Furthermore, the wide linearity range, the absence of bias, the low time required for each measurement and the low cost of the instrumentation needed are additional factors supporting the application of such a method as a screening tool in the direct determination of thallium ionic species in environmental samples.

Item Type:Article
ID Code:3841
Status:Published
Refereed:Yes
Uncontrolled Keywords:Thallium, square wave anodic stripping voltammetry, Square wave anodic stripping voltammetry (SWASV), microelectrodes, environmental samples
Subjects:Area 03 - Scienze chimiche > CHIM/01 Chimica analitica
Divisions:001 Università di Sassari > 01 Dipartimenti > Chimica
002 Altri enti e centri di ricerca del Nord Sardegna > INCA Consortium, Unità di Sassari, Sassari
Publisher:Elsevier
ISSN:0003-2670
Deposited On:07 May 2010 13:38

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