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Simple and versatile flow injection system for testing the performance of optical chemical sensors

One of the problems in testing the performance of (fiber) optical chemical sensors is to establish a reliable and reproducible test protocol in order to determine response time, reversibility, sensor stability, and longevity. A versatile arrangement for testing a variety of sensors is presented. It is based on the flow injection analysis (FIA) technique and was used to characterize new optical sensors for pH, potassium ion, and nitrate with respect to sensitivity, dynamic range, response time, specificity, and reversibility.