Analysis of Fish Freshness by Using Metallic Potentiometric Electrodes

We report herein the development of a simple electronic system that uses simple potentiometric electrodes applied to the analysis fish freshness. The array of sensors is built by using metallic electrodes as plain sharp wires or in a thick-film configuration. Experiments on real fish led to the conclusion that gold and silver electrodes are suitable for the development of qualitative systems able to classify fish in relation to its freshness. Equipment based on a microprocessors programmed with fuzzy logic can be developed for in situ monitorization of fish quality.