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Electrochemical Detection of Anions on an Electrophoresis Microchip with Integrated Silver Electrode
Author(s) -
Yan Jilin,
Yang Xiurong,
Wang Erkang
Publication year - 2005
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.200403241
Subject(s) - detection limit , electrode , microfluidics , electrochemistry , materials science , electrophoresis , halide , analytical chemistry (journal) , microfluidic chip , optoelectronics , nanotechnology , chromatography , chemistry , inorganic chemistry
Abstract A poly(dimethylsiloxane)/glass hybrid microfluidic chip with integrated silver electrode is described for electrochemical detection of anions. The working electrode was directly fabricated on a glass slide and the chip formed by reversibly sealing of a PDMS slab with microchannels to the slide. Under an alkaline phosphate condition, thiocyanide and three halides were sensitively detected. Factors influencing the separation and detection procedure were discussed and optimized. Linear responses over two magnitudes were obtained with limit of detection at the micromolar level.