1.1 本试验方法包括检测丙酮和甲醇中是否存在降低高锰酸钾的杂质。 1.2 为了使用本试验方法确定观察值或计算值是否符合相关规范，应根据实践修约方法，将用于表示规范极限的最后一个右手数字中的试验结果修约为“最接近的单位” E29年 . 1.3 以国际单位制表示的数值应视为标准。括号中给出的值仅供参考。 1.4 有关具体的危险信息和指导，请参阅供应商的材料安全数据表。 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====== 4.1 高锰酸盐时间可用于判断是否存在与分销过程中的制造或污染有关的可氧化材料，并评估是否符合规范。 4.2 许多使用丙酮或甲醇或两者的化学过程涉及对氧化敏感的催化剂、金属或配体络合物。由于可氧化污染物可能会影响这些过程的效率，本试验方法为制造控制和评估是否符合规范提供了比较试验。

1.1 This test method covers the detection in acetone and methanol of the presence of impurities that reduce potassium permanganate. 1.2 For purposes of determining conformance of an observed or a calculated value using this test method to relevant specifications, test result(s) shall be rounded off “to the nearest unit” in the last right-hand digit used in expressing the specification limit, in accordance with the rounding-off method of Practice E29 . 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 For specific hazard information and guidance, consult the supplier's Material Safety Data Sheet. 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 ====== 4.1 The permanganate time can be used to judge the presence of oxidizable materials that may be associated with manufacture or contamination during distribution and to assess compliance with a specification. 4.2 Many chemical processes that use acetone or methanol, or both, involve catalyst, metals, or ligand complexes that are sensitive to oxidation. Since oxidizable contaminants may affect the efficiency of these processes, this test method provides a comparative test for manufacturing control and assessing compliance with a specification.