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Lead Sensor Using Gold Nanostructured Screen‐Printed Carbon Electrodes as Transducers
Author(s) -
MartínezParedes Graciela,
GonzálezGarcía María Begoña,
CostaGarcía Agustín
Publication year - 2009
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.200804496
Subject(s) - reproducibility , electrode , materials science , square wave , detection limit , transducer , calibration , cyclic voltammetry , lead (geology) , calibration curve , electrochemistry , deposition (geology) , carbon fibers , analytical chemistry (journal) , nanotechnology , chemistry , chromatography , acoustics , composite material , voltage , composite number , biology , paleontology , quantum mechanics , geomorphology , statistics , physics , sediment , geology , mathematics
Gold nanostructured screen‐printed carbon electrodes are demonstrated to be suitable transducers for the determination of lead using square‐wave voltammetry. Reproducible gold nanostructures have been obtained by direct electrochemical deposition. A calibration plot from 2.5 to 250 μg/L was obtained in acidic solutions of Pb(II) with a reproducibility of 4% ( n =10). The detection limit was 0.09 μg/L of lead. The method is then applied to perform a blood lead analysis by adjusting square‐wave parameters in capillary or venous blood with a minimum sample pretreatment and excellent accuracy and reproducibility.