Minipotentiostat controlled by smartphone on a micropipette: A versatile, portable, agile and accurate tool for electroanalysis

• Published in: Electrochimica acta 2020-05, Vol.341, p.136048, Article 136048
• Main Authors: Barragan, José T.C., Kubota, Lauro T.
• Format: Article
• Language: English
• Subjects: Adapters; Arduino; Biosensors; Bluetooth; Electroanalysis; Electrochemical analysis; Electrolytic analysis; Hydrogen peroxide; Micropipette; Portable potentiostat; Reagents; Smartphone; Smartphones
• ISSN: 0013-4686; 1873-3859
• DOI: 10.1016/j.electacta.2020.136048

In this paper, we show an unprecedented device obtained by coupling a small potentiostat to an electronic micropipette. The minipotentiostat is powered by the micropipette battery and controlled by a smartphone via a Bluetooth wireless connection. A set of 3 electrodes is inserted into the tip of the micropipette with the aid of an adapter that allows electrochemical measurements to be carried out without affecting the precision and trueness of handling of small volumes of liquid. Studies with the device show significant gains in portability, versatility, agility and for analytical procedures. This approach requires small volume of samples and reagents with the possibility of recovery after analysis. Determination of hydrogen peroxide with the aim for future development of enzymatic biosensors for clinical analysis was shown as an example of application. We consider that the device shown here contributes to a new way to performing electrochemical analysis on site. [Display omitted] •New manner for performing electrochemistry procedures.•Accuracy, versatility, portability, quickness and possibility of content recovery.•Less chemicals, samples, waste, dispended time.•Fully portable controlled by smartphone.•Volumetric and analytical calibration possibilities.