基于溶胶-凝胶封装法的光学氧传感器
[Optical oxygen sensor based on a sol-gel encapsulation method].
作者信息
Ran Liangji, Lü Taiping, Xiang Shixue
机构信息
Department of Pharmaceutical Analysis, West China School of Pharmacy, Sichuan University, Chengdu 610041, China.
出版信息
Sichuan Da Xue Xue Bao Yi Xue Ban. 2003 Apr;34(2):337-40.
OBJECTIVE
To develop oxygen sensor by use of sol-gel encapsulation method and optical fiber technology. Method Organically modified sol-gel film was prepared by hydrolyzing tetraethoxysilane (TEOS) and methyltriethoxysilane (MTEOS) together, and film-processing conditions were optimized. Overall validation of the method was carried out by building Stern-Volmer plots and determining the concentration of oxygen in samples.
RESULTS
The optical fiber oxygen sensor was linear in a wide range (oxygen gas: 0%-100% and dissolved oxygen: 0.55 mg/L-33.1 mg/L 29 degrees C, r > 0.9990) and had a fast response time (T95 < 20 second). Signals were steady and not easily interfered. The results of measuring oxygen in samples by using the oxygen sensor and iodimetry respectively were compared and no significant difference was found.
CONCLUSION
The sensor system is applicable to continuous measurement of gas phase oxygen and dissolved oxygen on line in a complex rigorous conditions.
目的
利用溶胶 - 凝胶封装法和光纤技术研制氧传感器。方法 通过四乙氧基硅烷（TEOS）和甲基三乙氧基硅烷（MTEOS）共同水解制备有机改性溶胶 - 凝胶薄膜，并对成膜工艺条件进行优化。通过构建斯特恩 - 沃尔默曲线并测定样品中的氧浓度对该方法进行全面验证。
结果
光纤氧传感器在较宽范围内呈线性（氧气：0% - 100%，溶解氧：29℃时0.55 mg/L - 33.1 mg/L，r > 0.9990），响应时间快（T95 < 20秒）。信号稳定，不易受干扰。分别用氧传感器和碘量法测定样品中的氧，结果比较无显著差异。
结论
该传感器系统适用于在复杂苛刻条件下在线连续测定气相氧和溶解氧。
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