School of Engineering Technology, Fuel Laboratory of Renewable Energy (FLORE), Purdue University, West Lafayette, 47907, IN, USA.
Talanta. 2020 Oct 1;218:121146. doi: 10.1016/j.talanta.2020.121146. Epub 2020 May 16.
Jet fuel usually contains a small amount of dissolved water, which can separate out at high altitudes and low temperatures. This can bring along serious clog issues as water can freeze in fuel pumps, lines, or filters; blocking the fuel flow which can even cause engine shut down. To prevent such a disaster, an additive called fuel system icing inhibitor (FSII) is added to jet fuels. The amount of FSII is regulated in both civil and military jet fuels by pertinent standards. A method for quantification of FSII: diethylene glycol monomethyl ether (DiEGME) by comprehensive two-dimensional gas chromatography with flame ionization detector (GC × GC-FID) was developed. The method allows the determination of DiEGME from a very small quantity of samples (0.5 μL) and is very fast with a mean absolute error of 0.001 vol% and a correlation coefficient of 0.9997. The DiEGME content (in the range of 0.07-0.12 vol%) in 23 fuel samples was analyzed via GC × GC-FID. The accuracy of the proposed method was evaluated by the ASTM standard D5006. The procedure that utilizes a refractometer, outlined in D5006, is currently the only available standard for determining the DiEGME concentration in fuel. Results were within the repeatability of the D5006 method (0.009 vol%). Since the D5006 method is accepted as an accurate technique for DiEGME content determination, the GC × GC method proposed in this study can be considered precise and accurate.
喷气燃料通常含有少量溶解水，这些水在高海拔和低温下会分离出来。这可能会带来严重的堵塞问题，因为水会在燃料泵、管路或过滤器中冻结，阻塞燃料流动，甚至导致发动机停机。为了防止这种灾难，喷气燃料中会添加一种叫做燃料系统结冰抑制剂（FSII）的添加剂。民用和军用喷气燃料中的 FSII 含量都由相关标准规定。本文建立了一种使用全二维气相色谱-火焰离子化检测（GC×GC-FID）定量 FSII 的方法，即二乙二醇单甲醚（DiEGME）。该方法可以从非常少量的样品（0.5μL）中测定 DiEGME，检测速度非常快，平均绝对误差为 0.001 体积%，相关系数为 0.9997。通过 GC×GC-FID 分析了 23 个燃料样品中的 DiEGME 含量（范围为 0.07-0.12 体积%）。通过 ASTM 标准 D5006 评估了所提议方法的准确性。D5006 中概述的使用折射计的程序是目前唯一可用于确定燃料中 DiEGME 浓度的标准。结果在 D5006 方法的重复性范围内（0.009 体积%）。由于 D5006 方法被认为是测定 DiEGME 含量的准确技术，因此本研究中提出的 GC×GC 方法可以被认为是精确和准确的。
