Journal
MICROCHIMICA ACTA
Volume 184, Issue 4, Pages 1077-1084Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-017-2082-x
Keywords
Electrochemical detection; Square wave voltammetry; Electrospinning; AuNPs; FTO; Cadmium detection
Categories
Funding
- CNPq [150208/2016-2]
- FAPESP [2014/16789-5, 2013/26712-7]
- Capes
- MCTI-SisNano
- EMBRAPA
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [14/16789-5] Funding Source: FAPESP
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The authors have developed an electrochemical sensor for cadmium(II) that is based on the use of a conventional fluorine doped tin oxide (FTO) electrode modified with polymeric electrospun nanofibers consisting of polyamide 6 (PA6) and chitosan which were further modified with gold nanoparticles (AuNPs). The materials were characterized by infrared spectroscopy, thermal analysis (DSC and TGA), and scanning electron microscopy. The modified electrode was applied to the detection of Cd(II) by square wave voltammetry. Response is linear in the 25 to 75 mu g ai... L-1 Cd(II) concentration range, with a detection limit of 0.88 mu g ai... L-1. The relative standard deviations are 4.6% and 8.2% for intra- and inter-electrode measurements, respectively. Mercury(II), lead(II), and copper(II) did not significantly interfere.
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