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3D Printed Adapter to Commercial Electronic Micropipettes for Electroanalysis Directly Inside Disposable Tips
Author(s) -
Azevedo Gustavo Chevitarese,
Quirino Welber Gianini,
Matos Maria Auxiliadora Costa,
Matos Renato Camargo
Publication year - 2018
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.201800416
Subject(s) - pipette , microelectrode , materials science , adapter (computing) , reproducibility , electrode , cyclic voltammetry , aqueous solution , electrochemistry , ultramicroelectrode , repeatability , nanotechnology , voltammetry , analytical chemistry (journal) , biomedical engineering , chemistry , chromatography , computer science , computer hardware , medicine
The aim of this paper was to design a low cost 3D printed adapter to commercial micropipette that allows a pipette tip to be used as an electrochemical cell, for measurements at a microelectrode. This device combine the advantages of microelectrodes, electronic micropipettes and disposable tips for direct electrochemical analysis. The 3D printed device was used as a proof of concept, to analyze the voltammetric behavior of ferrocene using gold microelectrode in N,N‐Dimethylformamide (DMF) by square wave voltammetry (SWV), showing good response in non‐aqueous medium. The developed adapter was also tested for modifying a gold electrode directly inside a pipette tip, using only 10 μL of modification solution, with further dopamine analysis. The developed methodology was applied for determining dopamine in tap water samples as a proof of principle. The system was evaluated for repeatability (RSD 4 %, n=50), and reproducibility (RSD 4 %), indicating good performance for the considered concentration level. The work developed shows the efficacy and reliability of the constructed device, applicable to electrochemical analysis both in aqueous or non‐aqueous media.