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Three‐Electrode‐Integrated Sensor into a Micropipette Tip
Author(s) -
da Silva Rodrigo Amorim Bezerra,
Rabelo Adriano César,
Munoz Rodrigo Alejandro Abarza,
Richter Eduardo Mathias
Publication year - 2010
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.201000244
Subject(s) - electrode , pipette , materials science , microfiber , working electrode , auxiliary electrode , detector , reference electrode , nanotechnology , optoelectronics , composite material , electrical engineering , chemistry , engineering , electrolyte
This work describes the construction, characterization, and application of a three‐electrode‐integrated sensor into a micropipette tip. The three electrodes (working, pseudoreference and counter) are positioned at the end of a micropipette tip. The working electrode (graphite composite or gold microfiber) is placed inside the micropipette tip and the pseudo‐reference and counter electrodes outside (diametrically opposed sides). This approach is candidate for portable applications and allows the analysis and studies in low‐volume solutions (ca. 10 µL) which are useful for waste minimization and development of clean analytical methods. In addition, the three‐electrode‐integrated sensor can be easy used as detector in flow injection system through its direct joining at the end of polyethylene tubing of the FIA system.