1.1 本试验方法适用于大多数塑料，通过失重技术定量测定水分，降至50 mg/kg（50 ppm）。 1.2 以国际单位制表示的数值应视为标准。 1.3 用这种方法测试的样本将是热的，在测试完成后处理它们时要小心。 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和健康实践，并确定监管限制的适用性。 注1: 没有已知的ISO等效于本标准。 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 本试验方法旨在用作控制、验收和评估试验。 5.2 水分会影响某些材料的加工性能。对于这些材料，如果在含水量超出建议范围的情况下处理，则会出现缺陷。 5.3 水分含量对某些塑料的物理性能有很大影响。

1.1 This test method covers the quantitative determination of moisture by means of loss in weight technology down to 50 mg/kg (50 ppm) as it applies to most plastics. 1.2 The values stated in SI units are to be regarded as the standard. 1.3 Specimens tested by this method will be hot, use caution when handling them after testing has been completed. 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 and health practices and determine the applicability of regulatory limitations prior to use. Note 1: There is no known ISO equivalent to this standard. 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 This test method is intended for use as a control, acceptance, and assessment test. 5.2 Moisture will affect the processability of some materials. For these materials, defects will occur if they are processed with a moisture content outside of the recommended range. 5.3 The physical properties of some plastics are greatly affected by the moisture content.