1.1 本试验方法涵盖了在线流中的催化羟基自由基氧化系统（指南 D5173 )或对饮用水、废水、工业过程水和废水中的总有机碳、总碳和总无机碳进行实验室分析。它适用于溶解和悬浮物质。可以分析直径达2 mm的悬浮物和颗粒。 1.2 本试验方法允许测定总有机碳 ≥ 1毫克/升，TC ≥ 1 mg/L和TIC ≥ 1 mg/L。下限和上限工作范围受仪器限制- 依赖条件（例如，样品体积、每种反应物的量），并且可以在更宽的范围内进行调整。 1.3 本试验方法可用于测定总碳（TC）和总无机碳（TIC）。挥发性或可净化有机碳（VOC，POC）可通过本试验方法单独测定（见 附件A1 ). 1.4 本试验方法允许测量有机和无机碳浓度样品，以及含有溶解氯化物的样品，直至海水氯化物浓度。 1.5 本试验方法中使用的化学氧化过程是在环境压力和温度下使用羟基自由基进行的。 催化羟基自由基氧化的优点是不受海水盐度的干扰。 1.6 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 1.7 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户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。 有关具体的危险说明，请参阅第节 9 . 1.8 ASTM国际对与本标准提及的任何项目有关的任何专利权的有效性不持任何立场。明确建议本标准的用户，确定任何此类专利权的有效性以及侵犯此类权利的风险完全由其自行负责。 1.9 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 本试验方法用于测定来自各种自然、家庭和工业来源的水的碳含量。在其最常见的形式中，该试验方法用于测量有机碳，作为监测工业废水中有机污染物的一种手段。这些测量也用于监测废物处理过程。 5.2 文献中描述了TOC与其他水质参数的关系，如化学需氧量（COD）和总需氧量（TOD） ( 5 ) .

1.1 This test method covers the catalyzed hydroxyl radical oxidation system for the in-stream, online (Guide D5173 ) or laboratory analysis of total organic carbon, total carbon and total inorganic carbon in drinking water, wastewater, industrial process water, and effluent water. It is applicable to both dissolved and suspended materials. Suspended materials and particulates up to 2 mm in diameter can be analyzed. 1.2 This test method allows for determination of TOC ≥ 1 mg/L, TC ≥ 1 mg/L, and TIC ≥ 1 mg/L. The lower and upper working ranges are restricted by instrument-dependent conditions (for example, sample volume, amount of each reactant) and can be adjusted for a wider range. 1.3 This test method can be applied for the determination of total carbon (TC) and total inorganic carbon (TIC). Volatile or purgeable organic carbon (VOC, POC) can be determined separately by this test method (see Annex A1 ). 1.4 This test method allows the measurement of organic and inorganic carbon concentration samples, and samples containing dissolved chlorides up to seawater chloride concentrations. 1.5 The chemical oxidation process, applied in this test method, takes place at ambient pressure and temperature by using hydroxyl radicals. The advantage of catalytic hydroxyl radical oxidation is that it is free from seawater salinity interference. 1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.7 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. For specific hazard statements, see Section 9 . 1.8 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. 1.9 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 This test method is used for determination of the carbon content of water from a variety of natural, domestic, and industrial sources. In its most common form, this test method is used to measure organic carbon as a means of monitoring organic pollutants in industrial wastewater. These measurements are also used in monitoring waste treatment processes. 5.2 The relationship of TOC to other water quality parameters such as chemical oxygen demand (COD) and total oxygen demand (TOD) is described in the literature ( 5 ) .