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首页> 外文期刊>Fuel >Identification and quantification of trace oxygenated compounds in alternative jet fuels: Fluorescence methods for fast detection of phenolic compounds in operational field conditions
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Identification and quantification of trace oxygenated compounds in alternative jet fuels: Fluorescence methods for fast detection of phenolic compounds in operational field conditions

机译：替代喷射燃料中痕量含氧化合物的鉴定和定量：荧光方法，用于在操作场条件下快速检测酚类化合物

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摘要

The trace-oxygenated compounds in jet fuel reduce thermal stability. The identification and quantification of oxygenated species is typically conducted using solid phase extraction (SPE) followed by the analysis of extracted molecules by GC-MS. Our experimental results confirmed that SPE followed by methanol extraction of phenolic compounds could separate and recover quantitatively the oxygenated polar species from the fuel; however, the method is labor-intensive. The UV-Fluorescence of methanol-soluble SPE phenol doped jet fuels showed a linear response with phenol concentration. Although in general the UV-fluorescence response of phenols in jet fuel is linear, differences in response were observed depending on the type of standard studied. The differences in response can be explained by the nature of side functional groups in phenol with quenching effects. Fluorescence quenching with Rhodamine B (Rh-B) was explored for the direct analysis of phenols in jet fuels. The strong binding ability of phenols on Rh-B explain the quenching effect observed. However, studies conducted with other jet fuels indicates that nature of the fuel matrix also influences Rhodamine B (Rh-B) UV quenching. To address this issue, a new method that removes oxygenated compounds by SPE and that compares the Rhodamine-B spectra before and after SPE was developed.
机译：喷射燃料中的痕量氧化化合物可降低热稳定性。含氧物质的鉴定和定量通常使用固相萃取（SPE）进行，然后通过GC-MS分析提取的分子。我们的实验结果证实，SPE之后的甲醇化合物的提取可以分离和恢复燃料中的含氧极性物种;但是，该方法是劳动密集型的。甲醇可溶性SPE酚掺杂喷射燃料的UV-荧光显示出具有苯酚浓度的线性响应。虽然一般而至，脂肪燃料中酚的紫外荧光响应是线性的，但根据研究的标准类型观察到响应的差异。响应的差异可以通过酚醛含有淬火效果的旁官能团的性质来解释。探讨了用罗丹明B（RH-B）的荧光猝灭，用于在喷射燃料中的酚类直接分析。酚对rh-b上的苯酚的强粘合能力解释了观察到的猝灭效果。然而，用其他喷射燃料进行的研究表明燃料基质的性质也影响罗达胺B（RH-B）UV淬火。为了解决这个问题，通过SPE除去氧化化合物的新方法，并比较SPE之前和之后的罗丹明-B光谱。

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