溶解氧是一个重要的水质指标，在环境监测、水污染控制和环境化学中都需要观察和测定溶解氧。我国颁布的许多水质标准中都包含有溶解氧，溶解氧的含量和许多因素有关，水质恶化时溶解氧的含量很低甚至趋近零。溶解氧和生化需氧量是生化处理废水工艺设计和动力学研究的重要参数。水体自净程度与溶解氧有密切的关系。随着现代仪器的发展，溶解氧监测技术也在不断的发展，出现了许多新的测定溶解氧的方法，为检测便利和准确提供了手段。%Dissolved oxygen is an important indicator of water quality, and observation and measurement of dissolved oxygen are needed in environmental monitoring, water pollution control and environmental chemistry. Many of Chinese water quality standards contain dissolved oxygen index. Content of dissolved oxygen is related to many factors. When water quality corrupts, dissolved oxygen is low, even close to zero. Dissolved oxygen and Biochemical Oxygen Demand are important parameters in kinetic study and design of wastewater biological treatment process .The degree of water self-purification is closely related to dissolved oxygen index. With development of modern instruments, dissolved oxygen monitoring technology is constantly developing; there are many new ways of measuring dissolved oxygen now, which can provide the means for the convenient and accurate detection of dissolved oxygen.
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