Autotitrator based on an Arduino Open Source Pump

Teresa Del Castillo-Santaella; Julia Maldonado-Valderrama; Miguel Angel Fernandez-Rodriguez

doi:10.1016/j.ohx.2023.e00464

Autotitrator based on an Arduino Open Source Pump

HardwareX. 2023 Aug 7:15:e00464. doi: 10.1016/j.ohx.2023.e00464. eCollection 2023 Sep.

Authors

Teresa Del Castillo-Santaella^{1

2}, Julia Maldonado-Valderrama^{1

3}, Miguel Angel Fernandez-Rodriguez^{1

3}

Affiliations

¹ Department of Applied Physics, Faculty of Sciences, University of Granada, Campus de Fuentenueva s/n, 18071 Granada, Spain.
² Department of Physical Chemistry, Faculty of Pharmacy, University of Granada, Campus de Cartuja s/n, 18071 Granada, Spain.
³ Excellence Research Unit "Modeling Nature" (MNat), University of Granada, Granada, Spain.

Abstract

Acid-base titration is a quantitative analysis that enables knowing the quantity of acidic or basic groups present in a solution sample. It consists in the addition of base or acid to the solution sample while monitoring the pH to reach a neutral pH. The titration can be automated and here we present a low cost Arduino based Open Source Pump (OSPump) modified to act as an automated titrator with an obsolete but reliable Metrohm 713 pH meter. Our device is 50 times less expensive than second hand units from the pH meter manufacturer and inherently open to customization. We present two validation cases of study, including the lipolysis of a vegetable olive oil in water emulsion, characterized by the OSPump Titrator.

Keywords: Arduino; Automated titration; pH meter.