1.1 本试验方法涵盖丙烯浓缩物中甲醇的测定，范围约为4 mg/kg至40 mg/kg（百万分之一质量）。 1.2 以国际单位制表示的数值应视为标准值。括号中给出的值仅供参考。 注1: 螺纹没有直接可接受的SI当量。 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和健康实践，并确定监管限制的适用性。 具体警告声明见 11.1.1 , 11.2.1 和 12.11 . ====意义和用途====== 5.1 甲醇是丙烯浓缩物中常见的杂质。它可能对使用丙烯浓缩物作为原料的各种工艺产生有害影响。

1.1 This test method covers the determination of methanol in propylene concentrates in the range of approximately 4 mg/kg to 40 mg/kg (parts-per-million by mass). 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. Note 1: There is no direct acceptable SI equivalent for screw threads. 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 and health practices and determine the applicability of regulatory limitations prior to use. Specific warning statements are given in 11.1.1 , 11.2.1 , and 12.11 . ====== Significance And Use ====== 5.1 Methanol is a common impurity in propylene concentrate. It can have a deleterious effect on various processes that use propylene concentrate as a feedstock.