1.1本试验方法规定了一种快速筛选方法，使用傅立叶变换红外光谱（FA-FTIR）流动分析和偏最小二乘法（PLS-1）处理来测定航空涡轮燃料（AVTUR）中的脂肪酸甲酯（FAME）含量，范围为20至150 mg/kg。 注1 — 本试验方法范围内的规范为:规范 D1655 国防标准91-91 . 注释2 — 该测试方法检测所有FAME成分，峰值红外吸光度约为1749 cm -1 和C 8. 至C 22 分子，如规范等标准所规定 D6751 和EN 14214 . 该方法的准确性基于C16至C18 FAME物种的分子量；不同分子量的其他FAME物种的存在可能会影响准确性。 附注3 — 添加剂，如抗静电剂、抗氧化剂和缓蚀剂，通过FTIR光谱仪用FAME进行测量。然而，通过流动分析处理去除了这些添加剂的影响。 附注4 — 可以测量150 mg/kg至500 mg/kg和20 mg/kg以下的FAME浓度，但精度可能会受到影响。 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和健康实践，并确定监管限制的适用性。 ====意义和用途====== 5.1目前，国际政府越来越多地要求在柴油中添加脂肪酸甲酯（FAME），这产生了意外的副作用，导致多燃料运输设施（如货船和管道）中喷气涡轮燃料的潜在FAME污染，并引起了全行业的关注。 5.2已开发出能够测量小于5 mg/kg FAME水平的分析方法，但这些方法很复杂，需要专业人员和实验室设施。 这种快速筛选方法已开发出来，供非专业人员在供应链中使用，覆盖范围为20至150毫克/千克。

1.1 This test method specifies a rapid screening method using flow analysis by Fourier transform infrared (FA-FTIR) spectroscopy with partial least squares (PLS-1) processing for the determination of the fatty acid methyl ester (FAME) content of aviation turbine fuel (AVTUR), in the range of 20 to 150 mg/kg. Note 1 — Specifications falling within the scope of this test method are: Specification D1655 and Defence Standard 91-91 . Note 2 — This test method detects all FAME components, with peak IR absorbance at approximately 1749 cm -1 and C 8 to C 22 molecules, as specified in standards such as Specification D6751 and EN 14214 . The accuracy of the method is based on the molecular weight of C16 to C18 FAME species; the presence of other FAME species with different molecular weights could affect the accuracy. Note 3 — Additives such as antistatic agents, antioxidants and corrosion inhibitors are measured with the FAME by the FTIR spectrometer. However the effects of these additives are removed by the flow analysis processing. Note 4 — FAME concentrations from 150 mg/kg to 500 mg/kg, and below 20 mg/kg can be measured but the precision could be affected. 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 and health practices and determine the applicability of regulatory limitations prior to use. ====== Significance And Use ====== 5.1 The present and growing international governmental requirements to add fatty acid methyl esters (FAME) to diesel fuel has had the unintended side-effect of leading to potential FAME contamination of jet turbine fuel in multifuel transport facilities such as cargo tankers and pipelines, and industry wide concerns. 5.2 Analytical methods have been developed with the capability of measuring down to <5 mg/kg levels of FAME, however these are complex, and require specialized personnel and laboratory facilities. This Rapid Screening method has been developed for use in the supply chain by non specialized personnel to cover the range of 20 to 150 mg/kg.