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Updated: Nov 26, 2025

In vitro Monitoring of Extracellular pH in Real-Time
Published on: June 3, 2021
Monitoring of total potassium in winemaking processes using a potentiometric analytical microsystem
Antonio Calvo-López1, Ernest Martinez-Bassedas1, Mar Puyol1
1Group of Sensors and Biosensors, Department of Chemistry, Autonomous University of Barcelona, Edifici Cn, 08193 Barcelona, Spain.
Abstract:
Innovation in products and processes, traceability, food security and quality control are inherent challenges in agri-food sector. Trends in wine production are focused on obtaining natural wines with less chemical intervention. Following this goal, a low cost miniaturized, easy-to-use and highly automated microanalyzer to monitor total potassium in winemaking processes is presented. The microsystem monolithically integrates microfluidics as well as a potentiometric detection system and does not require any sample pretreatment. The analytical features provided are a linear range from 250 to 4000 mg L-1 K+, covering all the concentrations expected in must and wine samples, a detection limit of 75 ± 12 mg L-1 K+, and an adequate reproducibility and repeatability. Sample throughput is calculated at 20 h-1 with a waste volume generation lower than 4 mL per analysis. The microsystem lifetime is at least 4 months. Different wine and grape juice samples have been analyzed reaching outstanding results.
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