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Voltammetric Behavior and Trace Determination of Cadmium at a Calixarene Modified Screen‐Printed Carbon Electrode
Author(s) -
Honeychurch K. C.,
Hart J. P.,
Cowell D. C.,
Arrigan D. W. M.
Publication year - 2002
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200202)14:3<177::aid-elan177>3.0.co;2-v
Subject(s) - calixarene , detection limit , chemistry , anodic stripping voltammetry , cadmium , supporting electrolyte , voltammetry , stripping (fiber) , carbon paste electrode , electrolyte , inorganic chemistry , electrode , analytical chemistry (journal) , cyclic voltammetry , materials science , chromatography , electrochemistry , organic chemistry , molecule , composite material
Abstract Screen‐printed carbon electrodes (SPCEs) have been evaluated for the anodic stripping voltammetric determination of cadmium using open circuit accumulation facilitated by two different calixarenes: a novel thiolated calixarene, calixarene (I), (5,11,17,23,tetra‐ tert ‐butyl‐25,26,27,28‐tetrakis(2‐mercaptoethoxy)‐calix[4]arene), and a commercially available calixarene (II) (25,26,27,28‐tetrahydroxyl‐calix[4]arene). This approach has the advantage that the medium exchange technique can be applied to reduce the possibility of potential electroactive interferents. In the present method, following medium exchange to a clean electrolyte, differential pulse voltammetry was employed in the measurement. This combination resulted in a detection limit of 2.8 ngmL −1 and a linear calibration range up to 350 ngmL −1 Cd 2+ . There was no interference from Cr 3+ , Hg 2+ and Zn 2+ , but a decrease in signal was obversed when Pb 2+ and Cu 2+ were present. The screen‐printed sensor modified with calixarene (I) was successfully employed for the determination of Cd 2+ in a spiked river water sample.