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Direct Determination of Cadmium Traces in Natural Water by Adsorptive Stripping Voltammetry in the Presence of Cupferron as a Chelating Agent
Author(s) -
Grabarczyk Malgorzata,
Koper Anna
Publication year - 2012
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201100357
Subject(s) - chemistry , adsorptive stripping voltammetry , hanging mercury drop electrode , cadmium , adsorption , detection limit , chelation , mercury (programming language) , stripping (fiber) , anodic stripping voltammetry , voltammetry , chromatography , nuclear chemistry , inorganic chemistry , electrode , electrochemistry , materials science , organic chemistry , composite material , computer science , programming language
A sensitive, simple and fast adsorptive stripping voltammetric procedure for trace determination of cadmium in natural samples containing high concentrations of surface active substances and humic substances has been developed. The method is based on adsorptive accumulation of the Cd(II)‐cupferron complex onto a hanging mercury drop electrode, followed by the reduction of the adsorbed species by a voltammetric scan using differential pulse modulation. The detection limit was 3×10 −10 mol L −1 (33.6 ng L −1 ) with an accumulation time 30 s. The procedure was applied to the determination of Cd(II) in natural water samples without any pre‐treatment with satisfactory results.