Fiber Optic Chloride Ion Sensor

This portable optical fiber sensor is capable of detecting chloride ions in both water and soil environments simultaneously with high sensitivity, excellent stability, rapid response time and resistance to ion interference. Detecting the concentration of chloride ions in water and soil is of great significance for understanding chloride behavior in the ocean and monitoring environmental pollutants. It resulted in fluorescence quenching after g-CNQDs were modulated by silver ions (Ag +). [pdf]