海洋学研究 ›› 2022, Vol. 40 ›› Issue (1): 81-88.DOI: 10.3969/j.issn.1001-909X.2022.01.009
基于空气介质的光学溶解氧传感器便捷校准方法研究
基于荧光猝灭原理的光学溶解氧传感器可获得海水溶解氧时空数据，被广泛应用于海洋环境长期监测，但因其在贮存期间和布放期间会发生“贮存漂移”和“测量漂移”，需要进行校准。现有的实验室校准方法周期长、操作复杂。本文研究了光学溶解氧传感器在空气和水体两种不同介质中的响应特性，提出一种利用空气介质的光学溶解氧传感器现场校准方法，并在此基础上建立了仪器的两点校准模型。经实验验证，该校准方法能够有效修正溶解氧传感器的数据漂移，校正后的传感器测定值与Winkler滴定的标准值偏差在±6 μmol·L-1以内。该方法可以实现光学溶解氧传感器的便捷快速校正，免去实验室维护的繁琐步骤，提高监测数据质量，保持监测数据的连续性，具有重要的应用价值。
- 1.齐鲁工业大学(山东省科学院)海洋仪器仪表研究所,山东 青岛 266061;
2.山东省海洋监测仪器装备技术
重点实验室,山东 青岛 266061;
3.国家海洋监测设备工程技术研究中心，山东 青岛 266061
Research on convenient calibration method of optical dissolved oxygen sensor based on air medium
Optical dissolved oxygen sensor based on fluorescence quenching principle can obtain spatiotemporal data of dissolved oxygen in seawater, which is widely used in long-term monitoring of marine environment. However, due to the “storage drift” and “measurement drift” occurring during storage and distribution, it is necessary to calibrate and correct the data drift of the instrument. Existing calibration methods have long cycle and complex operation. In this project, the response characteristics of optical dissolved oxygen sensor in air and water medium were studied, and a field calibration method of optical dissolved oxygen sensor using air medium was proposed, and a two-point calibration model of the instrument was established. Experimental results show that the calibration method can effectively correct the data drift of the dissolved oxygen sensor, and the deviation between the measured value of the sensor and the standard value of Winkler titration is within ±6 μmol·L-1. This method can realize the convenient and rapid correction of optical dissolved oxygen sensor, avoid the tedious steps of laboratory maintenance, improve the quality of monitoring data, maintain the continuity of monitoring data, and has important application value.
- 1.Institute of Oceanographic Instrumentation, Qilu University of Technology (Shandong Academy of Sciences),
Qingdao 266061, China;
2.Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology,
Qingdao 266061, China;
3.National Engineering and Technological Research Center of Marine Monitoring
Equipment, Qingdao 266061, China
摘要： 基于荧光猝灭原理的光学溶解氧传感器可获得海水溶解氧时空数据，被广泛应用于海洋环境长期监测，但因其在贮存期间和布放期间会发生“贮存漂移”和“测量漂移”，需要进行校准。现有的实验室校准方法周期长、操作复杂。本文研究了光学溶解氧传感器在空气和水体两种不同介质中的响应特性，提出一种利用空气介质的光学溶解氧传感器现场校准方法，并在此基础上建立了仪器的两点校准模型。经实验验证，该校准方法能够有效修正溶解氧传感器的数据漂移，校正后的传感器测定值与Winkler滴定的标准值偏差在±6 μmol·L-1以内。该方法可以实现光学溶解氧传感器的便捷快速校正，免去实验室维护的繁琐步骤，提高监测数据质量，保持监测数据的连续性，具有重要的应用价值。
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