1.1 本规程描述了从溪流、河流、池塘、湖泊和海洋等位置采集的现场样品的测试样品制备（包括去除堵塞的水和水分）的标准程序。 1.2 这些程序适用于测定沉积物中的挥发性、半挥发性和非挥发性成分。 1.3 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。 1.4 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。 有关具体的预防说明，请参阅 附注3 . 1.5 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 对从溪流、河流、池塘、湖泊和海洋等位置收集的沉积物进行化学分析，可以提供具有环境意义的信息。 5.2 沉积物样品具有固有的异质性，因为它们包含不同且不可预测数量的封闭水，并且可能包含通常不被视为沉积物的异物或材料，如果包含这些异物或材料，将导致分析不准确。 5.3 分离异物以促进均匀化的标准方法将最大限度地减少因混合不良和夹杂异物而产生的误差。 5.4 标准化干燥程序提供了一种将分析值报告为普通干重的方法。

1.1 This practice describes standard procedures for preparation of test samples (including the removal of occluded water and moisture) of field samples collected from locations such as streams, rivers, ponds, lakes, and oceans. 1.2 These procedures are applicable to the determination of volatile, semivolatile, and nonvolatile constituents of sediments. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 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 a specific precautionary statement, see Note 3 . 1.5 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 chemical analysis of sediments, collected from such locations as streams, rivers, ponds, lakes, and oceans can provide information of environmental significance. 5.2 Sediment samples are inherently heterogeneous in that they contain occluded water in varying and unpredictable amounts and may contain foreign objects or material not ordinarily considered as sediment, the inclusion of which would result in inaccurate analysis. 5.3 Standard methods for separating foreign objects to facilitate homogenization will minimize errors due to poor mixing and inclusion of extraneous material. 5.4 Standardized procedures for drying provide a means for reporting analytical values to a common dry weight basis.