1.1 本试验方法测定柴油中的脂肪酸甲酯（FAME或生物柴油）。FAME可以从1.0定量测定 % 至30.0 % 按体积计算。该测试方法使用基于线性可变滤波器（LVF）阵列的中红外光谱来监测FAME浓度。 注1: 请参阅第节 6. 以获取可能影响此方法产生的结果的干扰列表。 1.2 该测试方法使用水平衰减全反射（HATR）晶体和单变量校准。 1.3 以国际单位制表示的数值应视为标准。本标准不包括其他计量单位。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 生物柴油是一种燃料商品，主要用作与柴油的混合成分。重要的是要检查柴油中生物柴油的浓度，以确保其不低于最低允许限值和/或不超过最高允许限值。 5.2 本试验方法适用于柴油和生物柴油混合物的生产和分销过程中的质量控制。

1.1 This test method determines fatty acid methyl esters (FAME or biodiesel) in diesel fuel oils. FAME can be quantitatively determined from 1.0 % to 30.0 % by volume. This test method uses linear variable filter (LVF) array based mid-infrared spectroscopy for monitoring FAME concentration. Note 1: See Section 6 for a list of interferences that could affect the results produced from this method. 1.2 This test method uses a horizontal attenuated total reflectance (HATR) crystal and a univariate calibration. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 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 Biodiesel is a fuel commodity primarily used as a blending component with diesel fuel. It is important to check the concentration of biodiesel in the diesel fuel in order to make sure it is either not below the minimum allowable limit and or does not exceed the maximum allowable limit. 5.2 This test method is applicable for quality control in the production and distribution of diesel fuel and biodiesel blends.