1.1 本试验方法 2. 涵盖了对液体和固体废物（如油、污泥、水溶液和其他废物基质）进行PCB筛选和定量的两层分析方法。 1.2 Tier I旨在快速筛选样本中是否存在多氯联苯。 1.3 Tier II用于确定多氯联苯的浓度，通常在2 毫克/千克 至50 毫克/千克。通过分析样品稀释液确定大于50 mg/kg的多氯联苯浓度。 1.4 这是一种模式识别方法 不 考虑可能发生的单个同系物，例如- 产品。本试验方法描述了Aroclors的使用 3. 1016、1221、1232、1242、1248、1254、1260、1262和1268作为参考标准，但也可以包括其他标准。Aroclors 1016和1242具有类似的毛细管气相色谱（GC）模式。干扰或风化对Aroclors 1016、1232和1242尤其有问题，并且可能难以区分这三种。 1.5 本试验方法提供了测定阿罗克罗所需的样品清理和仪器条件。描述了使用毛细管柱分离技术和电子捕获检测器（ECD）的气相色谱（GC）。 如果证明有足够的性能（例如灵敏度），则可以使用其他检测器，如原子发射检测器（AED）和质谱仪（MS）。实践中提供了有关GC和ECD使用的更多详细信息 E355页 , E697 和 E1510 . 1.6 报告了废物样品干重的定量结果。 1.7 定量限值将根据所分析废物流的类型而变化。 1.8 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。 1.9 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。 1.10 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 该测试方法为许多监管要求提供了足够的PCB数据。 而最常见的监管水平是50 ppm（干重校正），下限用于某些位置。由于不同类型的样品的灵敏度不同，因此应证明感兴趣的矩阵具有足够的方法检测限。 5.2 本试验方法不同于试验方法 D4059号 因为它提供了更多的样本清理选项，利用毛细管柱进行更好的模式识别和干扰识别，并包括定性筛选和定量结果选项。

1.1 This test method 2 covers a two-tiered analytical approach to PCB screening and quantitation of liquid and solid wastes, such as oils, sludges, aqueous solutions, and other waste matrices. 1.2 Tier I is designed to screen samples rapidly for the presence of PCBs. 1.3 Tier II is used to determine the concentration of PCBs, typically in the range of from 2 mg/kg to 50 mg/kg. PCB concentrations greater than 50 mg/kg are determined through analysis of sample dilutions. 1.4 This is a pattern recognition approach, which does not take into account individual congeners that might occur, such as in reaction by-products. This test method describes the use of Aroclors 3 1016, 1221, 1232, 1242, 1248, 1254, 1260, 1262, and 1268, as reference standards, but others could also be included. Aroclors 1016 and 1242 have similar capillary gas chromatography (GC) patterns. Interferences or weathering are especially problematic with Aroclors 1016, 1232, and 1242 and may make distinction between the three difficult. 1.5 This test method provides sample clean up and instrumental conditions necessary for the determination of Aroclors. Gas chromatography (GC) using capillary column separation technique and electron capture detector (ECD) are described. Other detectors, such as atomic emission detector (AED) and mass spectrometry (MS), may be used if sufficient performance (for example, sensitivity) is demonstrated. Further details about the use of GC and ECD are provided in Practices E355 , E697 , and E1510 . 1.6 Quantitative results are reported on the dry weights of waste samples. 1.7 Quantification limits will vary depending on the type of waste stream being analyzed. 1.8 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.9 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. 1.10 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 provides sufficient PCB data for many regulatory requirements. While the most common regulatory level is 50 ppm (dry weight corrected), lower limits are used in some locations. Since sensitivities will vary for different types of samples, one shall demonstrate a sufficient method detection limit for the matrix of interest. 5.2 This test method differs from Test Method D4059 in that it provides for more sample clean-up options, utilizes a capillary column for better pattern recognition and interference discrimination, and includes both a qualitative screening and a quantitative results option.