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Sodium Dodecyl Sulfate Doped Polyaniline for Enhancing the Electrochemical Sensitivity of Mercury Ions
Author(s) -
Nguyen Huy L.,
Cao Ha H.,
Nguyen Dzung T.,
Nguyen VânAnh
Publication year - 2017
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.201600438
Subject(s) - polyaniline , sodium dodecyl sulfate , aniline , detection limit , mercury (programming language) , electrochemistry , electrode , inorganic chemistry , conductive polymer , electrochemical gas sensor , materials science , dopant , chemistry , doping , chromatography , polymer , organic chemistry , optoelectronics , computer science , polymerization , programming language
Polyaniline (PANi) was electro‐synthesized on the surface of screen‐printed carbon electrodes in the presence of sodium dodecyl sulfate (SDS) as a dopant. The complex of aniline and SDS created a conductive (PANi‐SDS) film at lower aniline concentration. The PANi‐SDS film contained negative charge due to the anionic head of SDS. The PANi‐SDS modified electrode was integrated into a poly(dimethylsiloxane) microfluidic chip as an electrochemical sensor for mercury detection. The presence of SDS in the polyaniline film enhanced the possibility of mercury ions uptake, and therefore, increased the peak current of square wave anodic stripping in the mercury detection. The mercury sensor exhibited a dynamic range from 6 to 35 nM with detection limit of 2.4 nM.