Phase fluorometric dissolved oxygen sensor
Phase fluorometric dissolved oxygen sensor
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DOI：
10.1016/s0925-4005(00)00721-8
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发表时间：
2001-04-15
影响因子：
8.4
通讯作者：
MacCraith, BD
中科院分区：
文献类型：
--
作者：
McDonagh, C;Kolle, C;MacCraith, BD
本文报道了一种基于相荧光法检测氧敏感钌配合物猝灭荧光的坚固溶解氧（DO）探针的设计和性能。该复合物被包裹在多孔疏水溶胶-凝胶基质中，该基质已针对该应用进行了优化。LED激发和光电二极管检测采用量尺探针配置，将氧敏感膜涂在一次性PMMA光盘上，该光盘又设计用于通过全内反射引导光进入薄膜。设计的一个关键因素是信号和参考通道之间的共模相位抑制，需要仔细选择相关的光电元件。强调了相荧光法相对于强度测量法的优点。相位检测电子器件具有良好的长期稳定性，温度系数为0.00087。传感器响应表现出优异的信噪比（SNR）和可逆性，并对温度和压力进行了校正。检测限（LOD）通常为0.15 hPa或6 ppb。该传感器有许多潜在的应用，但它主要是为废水监测而设计的。(C) 2001 Elsevier Science B.V.版权所有
The design and performance of a ruggedised dissolved oxygen (DO) probe, which is based on phase fluorometric detection of the quenched fluorescence of an oxygen-sensitive ruthenium complex, is reported. The complex is entrapped in a porous hydrophobic sol-gel matrix that has been optimised for this application. The LED excitation and photodiode detection are employed in a dipstick probe configuration, with the oxygen-sensitive film coated on a disposable PMMA disc, which in turn is designed to guide Light into the film by total internal reflection. A key dement of the design is the common mode rejection of phase between the signal and reference channels, requiring careful selection of the relevant optoelectronic components. The advantages of the phase fluorometric approach over intensity measurement are highlighted. The phase detection electronics exhibits excellent long-term stability with a temperature coefficient of 0.00087. The sensor response exhibits excellent signal-to-noise ratio (SNR) and reversibility and has been corrected for both temperature and pressure. The limit of detection (LOD) is typically 0.15 hPa or 6 ppb. The sensor has many potential applications but it has been designed primarily for application in waste-water monitoring. (C) 2001 Elsevier Science B.V. All rights reserved.