1.1 本试验方法规定了一种使用傅里叶变换红外（FA-FTIR）光谱和偏最小二乘（PLS）处理进行流量分析的快速筛选方法，用于定量测定中间馏分的脂肪酸甲酯（FAME）污染，范围为20 mg/kg至1000 毫克/千克，以及稀释后的中间馏分和残余燃料，浓度高于0.1%。 注1: 附件A2 描述了一种稀释程序，该程序可将馏分油的测量范围显著扩大到1000 mg/kg以上，并可测量残余油 注2: 该测试方法检测所有FAME组分，红外吸收峰值约为1749 cm -1 和C 8. 至C 22 分子，如标准中规定的 D6751型 以及EN 14214。测试方法的准确性基于C的分子质量 16 至C 18 FAME物种；具有不同分子质量的其他FAME物种的存在可能影响准确性。 注3: 抗静电剂、抗氧化剂和缓蚀剂等添加剂通过FTIR光谱仪用FAME测量。然而，这些添加剂的任何潜在干扰效应都可以通过流量分析处理消除。 注4: 本试验方法的范围不包括试验方法所述的航空涡轮燃料 D7797年 . 1.2 以国际单位制表示的值应视为标准值。本标准不包括其他测量单位。 1.3 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建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 5.1 目前，国际政府要求在柴油中添加脂肪酸甲酯（FAME），这一要求日益增长，但其副作用却出乎意料，导致多燃料运输设施（如油轮和管道）中的燃料可能受到FAME污染，并引发行业广泛关注。这导致要求测量柴油和其他燃料中的污染水平，以协助监管转移问题。 5.2 已开发出分析方法，能够测量航空涡轮燃料（AVTUR）中的FAME含量低于5 mg/kg，但这些方法很复杂，需要专业人员和实验室设施。 这种快速筛选方法是为非专业人员在供应链中使用而开发的，适用范围为20 毫克/千克 至500 000 mg/kg（0.002 % 到 50 %). 5.3 类似程序，试验方法 D7797年 ，适用于AVTUR，范围为10 mg/kg至150 毫克/千克。试验方法 D7797年 使用相同的设备，并为AVTUR开发了特定的模型。

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) processing for the quantitative determination of the fatty acid methyl ester (FAME) contamination of middle distillates, in the range of 20 mg/kg to 1000 mg/kg, and of middle distillates and residual fuels, following dilution, for levels above 0.1 %. Note 1: Annex A2 describes a dilution procedure to significantly expand the measurement range above 1000 mg/kg for distillates and to enable measurement of residual oils 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 D6751 and EN 14214. The accuracy of the test method is based on the molecular mass of C 16 to C 18 FAME species; the presence of other FAME species with different molecular masses 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 any potential interference effects of these additives are eliminated by the flow analysis processing. Note 4: The scope of this test method does not include aviation turbine fuel which is addressed by Test Method D7797 . 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 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 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 fuels in multi-fuel transport facilities such as cargo tankers and pipelines, and industry wide concerns. This has led to a requirement to measure contamination levels in diesel and other fuels to assist custody transfer issues. 5.2 Analytical methods have been developed with the capability of measuring down to <5 mg/kg levels of FAME in aviation turbine fuel (AVTUR), 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 mg/kg to 500 000 mg/kg (0.002 % to 50 %). 5.3 A similar procedure, Test Method D7797 , is available for AVTUR in the range 10 mg/kg to 150 mg/kg. Test Method D7797 uses the same apparatus, with a specific model developed for AVTUR.