1.1 本试验方法包括饮用水的分析。当包括充分的验证时，它也适用于许多环境和废水。 1.2 本试验方法涵盖了卤代甲烷、卤代乙烷和一些相关的可提取有机卤化物的测定，可通过气相色谱法进行测量。三卤甲烷的适用浓度范围为1 μg/L至200 μg/L。检测限取决于化合物、基质和气相色谱系统的特性。 1.3 对于精密度和偏倚部分未具体包括的化合物，分析员应通过收集实际样品的精密度和偏倚数据来验证测试方法。 1.4 通过使用不同极性的气相色谱柱观察保留时间来确认组分的同一性。当浓度足够高时（＞50μg/L），可使用卤素专用检测器或气相色谱/质谱法（GC/MS）进行确认。 使用试验方法可确认可清洗化合物的含量低至1μg/L D3871 用GC/MS检测。 1.5 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。 1.6 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。 具体的预防说明见第节 8. . 1.7 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 在水的氯化过程中，有机物质偶然转化为三卤甲烷和其他挥发性有机卤化物，这可能会危害健康，也是许多研究的对象。该试验方法可作为一种快速、简单的方法来测定原水和加工水中的许多挥发性有机卤化物。

1.1 This test method covers the analysis of drinking water. It is also applicable to many environmental and waste waters when adequate validation is included. 1.2 This test method covers the determination of halomethanes, haloethanes, and some related extractable organohalides amenable to gas chromatographic measurement. The applicable concentration range for trihalomethanes is from 1 μg/L to 200 μg/L. Detection limits depend on the compound, matrix, and on the characteristics of the gas chromatographic system. 1.3 For compounds not specifically included in the precision and bias section the analyst should validate the test method by collecting precision and bias data on actual samples. 1.4 Confirmation of component identities is obtained by observing retention times using gas chromatographic columns of different polarities. When concentrations are sufficiently high (>50 μg/L) confirmation with halogen specific detectors or gas chromatography/mass spectrometry (GC/MS) may be used. Confirmation of purgeable compounds at levels down to 1 μg/L can be obtained using Test Method D3871 with GC/MS detection. 1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.6 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. Specific precautionary statements are given in Section 8 . 1.7 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 The incidental conversion of organic material to trihalomethanes and other volatile organohalides during chlorination of water is a possible health hazard and is the object of much research. This test method can be used as a rapid, simple means for determining many volatile organohalides in raw and processed water.