1.1 本试验方法包括在线和在线测定溶解臭氧（DO 3. )在0.001 mg/L至5.0 mg/L DO范围内的低电导率水中 3. 电导率<100μS/cm，是典型的制药和微电子纯水。做 3. 通过将膜覆盖的电化学传感器的响应与溶解的臭氧浓度相关联来检测。 1.2 与通常用于抓取样品测量的比色法相比，该测试方法为连续测量提供了更方便的方法。 1.3 该试验方法具有灵敏度高、在工艺环境中耐久性好、干扰小的优点。 1.4 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.5 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 溶解臭氧在许多行业中都很有用，用于水消毒、TOC降低、食品保存、代替食品和饮料系统的清洁以及热原破坏。在工艺使用之前，通常有必要了解有多少臭氧进入水中，还有多少臭氧残留，以及臭氧被去除的程度。 5.2 某些应用程序需要联系时间，DO 3. 计算随时间积分的浓度，以确保消毒。 5.3 需要对这些测量中的趋势进行连续观察以进行连续质量监测，并且该测量可用于臭氧氧化的闭环控制。 5.4 在许多纯水应用中，尤其是在水质由美国食品药品监督管理局或类似执法机构监管的情况下，必须在用水前完成臭氧去除。该测试方法可用于检测和确定水中痕量溶解臭氧水平以及发生消毒和化学反应的工艺浓度。

1.1 This test method covers the on-line and in-line determination of dissolved ozone (DO 3 ) in low conductivity water in the range from 0.001 mg/L to 5.0 mg/L DO 3 and conductivity <100 μS/cm, typical of pharmaceutical and microelectronics pure waters. DO 3 is detected by correlating the response of a membrane-covered electrochemical sensor to the dissolved ozone concentration. 1.2 This test method provides a more convenient means for continuous measurement than the colorimetric methods typically used for grab sample measurements. 1.3 This test method has the advantage of high sensitivity as well as durability in the process environment and has few interferences. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 Dissolved Ozone is useful in many industries for water sanitization, TOC reduction, food preservation, cleaning-in-place of food and beverage systems, and pyrogen destruction. It is often necessary to know how much ozone has entered the water, how much remains, and the degree to which it has been removed before process use. 5.2 Some applications require that contact time, DO 3 concentration integrated over time, be calculated, to assure disinfection. 5.3 Continuous observation of trends in these measurements are needed for continuous quality monitoring and the measurement may be used for closed loop control of ozonation. 5.4 In many pure water applications and especially where water quality is regulated by the FDA or similar enforcement agencies, ozone removal must be complete before the water is used. This test method is useful for detecting and determining dissolved ozone levels in water at the trace level as well as at process concentrations where sanitization and chemical reactions occur.