1.1 本试验方法包括测定所有形式的羊毛（油脂棉除外）样品中可萃取物质的量，该样品可使用不易燃蒸汽脱脂和清洁溶剂萃取。 1.2 本试验方法不包括测定提取物中不同成分的含量，也不包括其识别。 1.3 本试验方法适用于其他动物纤维。 注1: 测试方法涵盖了纱线和毛毡中可提取物质的测定 D2257 和 D461页 . 关于烘干擦洗羊毛中乙醇可提取物质的测定，请参阅试验方法 D584 和 D1334 . 1.4 以国际单位制表示的数值应视为标准值。 国际单位制后括号中给出的值仅供参考，不被视为标准值。 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。 看见 5.4 和 附注3 . 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 试验方法 D1574 由于该方法已在验收测试行业中广泛使用，因此被认为是令人满意的验收测试方法。 5.1.1 如果因使用测试方法时报告的测试结果的差异而产生争议 D1574 对于商业装运的验收测试，买方和供应商应进行比较测试，以确定其实验室之间是否存在统计偏差。建议为调查偏差提供称职的统计协助。作为最低要求，双方应尽可能均匀地从大量相关类型的材料中选取一组试样。 然后，应将试样以相同数量随机分配给每个实验室进行测试。两个实验室的平均结果应使用学生的 t -测试未配对数据和双方在测试开始前选择的可接受概率水平。如果发现偏差，必须找到并纠正其原因，或者买方和供应商必须同意根据已知偏差解释未来的测试结果。 5.2 本试验方法可用于估计精练后残留在羊毛纤维上或羊毛纤维中的油、油脂和蜡质材料的数量，或梳理前添加的润滑剂或梳理后残留的润滑剂的数量，或在后续加工操作中添加或去除的此类材料的数量。 5.3 如果需要，可对本试验中获得的残留物进行化学分析，以识别和测定成分材料。 5.4 本试验方法中规定的溶剂不会去除羊毛中可能存在的某些物质，如肥皂，因此在某些情况下可能更准确地反映羊毛中某些可萃取物（如油）的添加量。当存在此类材料且需要估计其数量时，应按照材料规范或协议中的规定使用一些其他溶剂或溶剂组合。本试验方法附录中的信息可用于此目的。过去使用过各种溶剂，并且在一定程度上仍在使用。 然而，由于易燃性、毒性或麻醉作用或难闻气味，这些溶剂中的许多都是不受欢迎的。三氯三氟乙烷不可燃，毒性极低，稳定性高，是大多数脂肪或矿物油、油脂和蜡的良好溶剂。在试验条件下，在实验室间试验中发现指定溶剂不能提取羊毛蛋白。 注2: 由于指定的溶剂主要是油的溶剂而不是肥皂，因此在此过程中获得的可萃取物质可被视为商业油含量的测量值。 注3: 由于中列出的一些溶剂具有危险性 表A1.1 在本试验方法条件下使用前，用户应参考制造商的使用建议。

1.1 This test method covers the determination of the amount of extractable matter in samples of all forms of wool, except grease wool, that is extractable with a non-flammable vapor degreasing and cleaning solvent. 1.2 This test method does not cover the determination of the amounts of different components in the extracted matter nor their identification. 1.3 This test method is suitable for use with other animal fibers. Note 1: The determination of extractable matter in yarns and in felts is covered in Test Methods D2257 and D461 . For the determination of alcohol-extractable matter in oven-dry scoured wool, refer to Test Methods D584 and D1334 . 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered 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. See 5.4 and Note 3 . 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 Test Method D1574 is considered satisfactory for acceptance testing since the method has been used extensively in the trade for acceptance testing. 5.1.1 In case of a dispute arising from differences in reported test results when using Test Method D1574 for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to determine if there is a statistical bias between their laboratories. Competent statistical assistance is recommended for the investigation of bias. As a minimum, the two parties should take a group of test specimens that are as homogeneous as possible and that are from a lot of material of the type in question. The test specimens should then be randomly assigned in equal numbers to each laboratory for testing. The average results from the two laboratories should be compared using Student's t -test for unpaired data and an acceptable probability level chosen by the two parties before the testing is begun. If a bias is found, either its cause must be found and corrected or the purchaser and the supplier must agree to interpret future test results in the light of the known bias. 5.2 This test method may be used to estimate the quantity of oil, grease, and waxy materials remaining on or in wool fibers after scouring, or the quantity of lubricant added before carding or remaining after carding, or the quantity of such materials added or removed in subsequent processing operations. 5.3 The residues obtained in this test may be subjected to chemical analysis for identification and assay of the component materials, if desired. 5.4 The specified solvent in this test method does not remove some materials, such as soaps, that may be present in wool and hence in some cases may reflect more closely the added content of some extractables in wool such as oils. When such materials are present and an estimate of their quantity is desired, some other solvent or combination of solvents should be used as specified in a material specification or by agreement. The information in the Annex of this test method may be useful for this purpose. Various solvents have been used in the past, and are still used to some extent. Many of these solvents are undesirable, however, because of flammability, toxic or anesthetic effects, or unpleasant odors. Trichlorotrifluoroethane is nonflammable, has a very low level of toxicity, and a high degree of stability and is a good solvent for most fatty or mineral oils, greases, and waxes. The specified solvent, under conditions of the test, was found in interlaboratory test not to extract wool protein. Note 2: Since the specified solvent is primarily a solvent for oils rather than soap, the extractable matter obtained in this procedure may be considered a measure of commercial oil content. Note 3: Due to the hazardous nature of some of the solvents listed in Table A1.1 , the user should refer to the manufacturer's recommendations for use before using under the conditions of this test method.