本文件规定了聚氨酯生产中使用的聚醚多元醇中存在的微量基本材料的测量方法。了解多元醇中的微量碱度对于防止聚氨酯预聚物生产过程中反应物的凝胶化非常重要。控制用于聚氨酯生产的多元醇中的碱度也很有用，以确保一致且可重复的反应行为。该方法适用于质量控制、规范测试和研究。 适用范围为0μg至50μg/g，以KOH表示。该方法不适用于胺基多元醇。这些值可以报告为CPR（可控聚合速率）单位。

This document specifies a method for the measurement of trace amounts of basic materials present in polyether polyols used in the production of polyurethanes. It is important to know the trace amount of basicity in a polyol to prevent gelation of the reaction mass during the production of polyurethane prepolymers. It is also useful to control the basicity in polyols used for polyurethane production to assure consistent and reproducible reaction behaviour. This method is suitable for quality control, as a specification test and for research. The applicable range is 0？μg to 50？μg/g, expressed as KOH. The method is not applicable to amine-based polyols. The values can be reported as CPR (controlled polymerization rate) units.