用钌(Ⅱ) 邻菲咯啉配合物作为指示剂,研制成功一种基于荧光猝灭原理的光纤氧气传感器。采用锁相放大技术,实现了对弱荧光信号的检测。该传感器的检测下限为5×10?? -6??,检测精度为5×10?? -7??,响应时间??T≤10?? s,并具有较强的抗干扰能力、较好的重复性和稳定性。

By using Ru(phen) 3Br 2 as the indicator, a fiber optic oxygen sensor based on fluorescence quenching has been developed. The weak fluorescence signal has been detected by the lock in technology and the detection of the concentration of oxygen has been achieved by detecting the hysteresis of phase shift. The sensor has the detecting limit of 5×10 -6 and the detecting accuracy of 5×10 -7 , and its response time is less than 10 seconds. It also has good reproducibility, stability and strong ability of immunity from disturbance.