1.1 本规程涵盖了从指定来源（批次）采集大量棉纤维样品的程序，并通过一系列步骤减少批次样品，以生产代表来源且适合根据既定程序测定纤维特性的试样。 1.2 该规程已广泛用于棉纤维的商业验收测试以及仲裁测试和研究。 注1: 本规程用于通过试验方法采集棉花样品进行试验 D1440 , D1442号 , D1445 , D1447 , D1448号 , D1464 , D2480 , D2812 , D5866 和 D5867 . 1.3 该程序不包括水分测定样品的选择。本规程中未规定为测定水分而采集的样品所需的特殊处理和保护样品免受盛行大气的影响。 见测试方法 D2495 . 1.4 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。 1.5 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。 1.6 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 任何测试方法结果的可靠性主要取决于测试样本代表原始源材料或批次的程度。 无论测试方法的准确性和精密度如何，如果未能提供准确代表抽取批次的试样，将产生误导性的测试结果。

1.1 This practice covers procedures for taking a lot sample of cotton fibers, from a designated source (lot), and reducing the lot sample through a series of steps to produce test specimens that are representative of the source and suitable for the determination of fiber properties according to established procedures. 1.2 This practice has been used extensively for commercial acceptance testing of cotton fibers as well as for arbitration testing and research. Note 1: This practice is used in taking samples of cotton for testing by Test Methods D1440 , D1442 , D1445 , D1447 , D1448 , D1464 , D2480 , D2812 , D5866 and D5867 . 1.3 The procedures do not cover the selection of samples for the determination of moisture. Special handling and protection of the sample from the prevailing atmosphere required for samples taken for the determination of moisture are not provided for in this practice. See Test Method D2495 . 1.4 The values stated in SI units are to be regarded as standard. No other units of measure 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 The reliability of the results of any test method depends primarily upon how well the specimens tested represent the original source material or lot. Failure to provide a test specimen which accurately represents the lot from which it is drawn will produce misleading test results regardless of the accuracy and precision of the test method.