用Ru (bpy) 3Cl2 為指示劑,研制一種能用來測定溶解氧的光纖氧傳感器。該傳感器的響應時間小于30 s ,檢測下限為0. 5 mg/ L ,檢測準確度為0. 01 mg/ L ,并具有較強的抗干擾能力、較好的重復性和穩定性,可用于對環境水質的在線監測。
關鍵詞: 光纖氧傳感器; 水質監測; 鎖相放大; 熒光猝滅; 溶解氧
Abstract : A optical fiber oxygen sensor for detecting dissolved oxygen in water has been fabricated by using Ru (bpy) 3Cl2 as the indicator. The sensor’s response time is less than 30 s. It has the detecting limit of 0. 5 mg/ L and the detecting precision of 0. 01 mg/ L. Moreover ,the sensor has strong ability of anti2disturbance ,better re2 peatability and stability. So it can monitor the changes of the concentration of dissolved oxygen in the water on line.
Key words : optical fiber oxygen sensor ; water quality monitoring ; phase lock2in amplifying ; fluorescence quenching ; dissolved oxygen