Department of Mathematics, Chemistry and Physics, West Texas A&M University, Canyon, TX 89016, USA.
Analyst. 2011 Aug 21;136(16):3335-42. doi: 10.1039/c1an15142h. Epub 2011 Jul 11.
The industrial use of ozone as a sanitizing agent in water treatment and food processing in recent years calls for sensor technologies for monitoring ozone in water for process control. Ozone molecules absorb UV light with a peak absorption wavelength at 254 nm. This property has been used in this work to develop a simple sensor technology for online, real-time continuous monitoring of trace ozone in water. A Teflon AF2400 tube filled with pure water forms a liquid core waveguide (LCW), which is used as a long-path-length optical absorption cell. This pure water filled tube was deployed into a water sample. Ozone molecules dissolved in the water sample permeate through the Teflon AF2400 tube wall and dissolve in water filled in the tube. This prevents interference species from entering the LCW, and eliminates interferences. The optical absorption signal of the long-path-length cell at 254 nm measured by guiding light through the LCW is used as a sensing signal. This simple structured sensor does not involve any chemical reagent, is reversible, and has a response time <4.5 minutes. It can be used to detect ozone in water samples down to 3.6 × 10(-9) mol L(-1).
近年来，臭氧在水处理和食品加工中的工业用途要求开发用于监测水中臭氧的传感器技术，以实现过程控制。臭氧分子吸收波长为 254nm 的紫外光，这一特性在本工作中被用于开发一种简单的传感器技术，用于在线、实时连续监测水中痕量臭氧。填充有纯水的特氟龙 AF2400 管形成液体芯波导（LCW），用作长光程吸收池。将充满纯水的管部署到水样中。溶解在水样中的臭氧分子透过特氟龙 AF2400 管壁渗透并溶解在管内的水中。这可防止干扰物质进入 LCW 并消除干扰。通过引导光通过 LCW 测量的 254nm 处的长光程池的光吸收信号用作传感信号。这种结构简单的传感器不涉及任何化学试剂，是可逆的，响应时间<4.5 分钟。它可用于检测水样中的臭氧，最低检测浓度低至 3.6×10(-9)mol L(-1)。
