1.1 本试验方法描述了测定暴露在碱性环境中对纤维素纤维强度影响的程序。碱性环境是指pH值在2小时或更长时间内大于8的任何基质。 1.2 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。 1.3 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。 1.4 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 该方法旨在提供一种通用程序，用于测定暴露于碱性环境中的纤维素纸浆纤维的稳定性。具体而言，该方法允许基于零跨度拉伸试验比较各种纸浆类型暴露在碱性条件下对单个纤维素纤维强度的影响。程序中列出的时间间隔并不重要，可以添加更多持续时间更短或更长的间隔。此外，只要确定了间隔范围，就可以通过删除一些中间间隔来简化该过程。简化程序的一个示例是确定4个间隔（例如，1天、1周、2周、4周； 或1天、3天、7天、14天）。 5.2 指定溶液（1N NaOH）呈强碱性。虽然该碱浓度高于本试验模拟的某些环境，但较强的pH值可以更好地区分不同类型的纤维素纤维。虽然碱性稳定性基于其他碱（例如KOH、Ca（OH）） 2. 等）在不同浓度下，可通过该方法测定，1N NaOH被视为标准溶液。如果额外溶液提供有用信息，则可在标准溶液之外报告其他处理的碱性稳定性结果。

1.1 This test method describes a procedure for determining the effect of exposure to alkaline environments on the strength of cellulose fibers. An alkaline environment is defined to be any matrix in which the pH is greater than 8 for a period of 2 or more hours. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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. 1.4 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 method is intended to provide a generalized procedure for determining the stability of cellulosic pulp fibers exposed to alkaline environments. Specifically, this method allows various pulp types to be compared with respect to the effect of exposure to alkaline conditions on the strength of individual cellulosic fibers based on a zero-span tensile test. The time intervals listed in the procedure are not critical, and more intervals of shorter or longer duration may be added. In addition, the procedure may be simplified by removing some of the intermediate intervals so long as a range of intervals is determined. An example of a simplified procedure would be to determine 4 intervals (for example, 1 day, 1 week, 2 weeks, 4 weeks; or 1 day, 3 day, 7 day, 14 day). 5.2 The specified solution (1N NaOH) is strongly alkaline. Although this alkali concentration is higher than some environments that would be simulated by this test, the stronger pH provides better differentiation between different cellulose fiber types. Although alkaline stability based on other alkalis (for example, KOH, Ca(OH) 2 , etc.) at a different concentration could be determined by this method, 1N NaOH is to be considered the standard solution. Alkaline stability results from other treatments may be reported in addition to the standard solution if the additional solution(s) provide useful information.