PubReading [117] - Real-time Voltammetric Anion Sensing Under Flow - S. Patrick, J. Davis

The development of real-life applicable ion sensors, in particular those capable of repeat use and long-term monitoring, remains a formidable challenge. Herein, we demonstrate, in a proof-of-concept, the real-time voltammet- ric sensing of anions under continuous flow in a 3D-printed microfluidic system. Electro-active anion receptive halogen bonding (XB) and hydrogen bonding (HB) ferrocene-isophtha- lamide-(iodo)triazole films were employed as exemplary sensory interfaces. Upon exposure to anions, the cathodic perturbations of the ferrocene redox-transducer are monitored by repeat square-wave voltammetry (SWV) cycling and peak fitting of the voltammograms by a custom-written MATLAB script. This enables the facile and automated data processing of thousands of SW scans and is associated with an ov ...