Evaluating Platinum‐Based Ionic Polymer Metal Composites as Potentiometric Sensors for Dissolved Ozone in Ultrapure Water Systems

Monitoring the content of dissolved ozone in purified water is often mandatory to ensure appropriate levels disinfection and sanitization. However, quantification bears challenges as colorimetric assays require laborious off-line analysis, while commercially available instruments for electrochemical process analysis are expensive lack possibility miniaturization discretionary installation. In this study, potentiometric ionic polymer metal composite (IPMC) sensors determination ultrapure (UPW) systems presented. Commercially electrolyte membranes treated via an impregnation-reduction method obtain nanostructured platinum layers. By applying 25 different synthesis conditions, layer thicknesses 2.2 12.6 µm obtained. Supporting radiographic analyses indicate that concentration impregnation solution has highest influence on obtained loading. The sensor response behavior explained by a Langmuir pseudo-isotherm model allows trace less than 10 µg L−1. Additional statistical evaluations show expected Pt loading blackening can be predicted with high accuracy significance (R2adj. > 0.90, p < 10−10) solely from given conditions.