Development of Two Types of POF Amine Sensors and Their Apprications to Optical Sensing of Fish-food Freshness

Abstract

Two types of plastic optical fiber (POF) sensors for detecting amine vapor, which is produced from decomposed fish food, have been studied. One is based on the absorbance change in cladding polymer doped with Cresol-red dye. The other is based on the swelling phenomena in cladding polymer.
Both POF-type amine sensors showed good sensitivity and reproducibility aginst a vapor phase methylamine. Using these POF amine sensors and a low cost signal processing system, an optical sensing of fish-food freshness can be possible.