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首页> 美国卫生研究院文献>Journal of Visualized Experiments : JoVE >Qualitative Characterization of the Aqueous Fraction from Hydrothermal Liquefaction of Algae Using 2D Gas Chromatography with Time-of-flight Mass Spectrometry
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Qualitative Characterization of the Aqueous Fraction from Hydrothermal Liquefaction of Algae Using 2D Gas Chromatography with Time-of-flight Mass Spectrometry

机译：二维气相色谱-飞行时间质谱法对藻类水热液化的水馏分的定性表征

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摘要

Two-dimensional gas chromatography coupled with time-of-flight mass spectrometry is a powerful tool for identifying and quantifying chemical components in complex mixtures. It is often used to analyze gasoline, jet fuel, diesel, bio-diesel and the organic fraction of bio-crude/bio-oil. In most of those analyses, the first dimension of separation is non-polar, followed by a polar separation. The aqueous fractions of bio-crude and other aqueous samples from biofuels production have been examined with similar column combinations. However, sample preparation techniques such as derivatization, solvent extraction, and solid-phase extraction were necessaryprior to analysis. In this study, aqueous fractions obtained from the hydrothermal liquefaction of algae were characterized by two-dimensional gas chromatography coupled with time-of-flight mass spectrometry without prior sample preparation techniques using a polar separation in the first dimension followed by a non-polar separation in the second. Two-dimensional plots from this analysis were compared with those obtained from the more traditional column configuration. Results from qualitative characterization of the aqueous fractions of algal bio-crude are discussed in detail. The advantages of using a polar separation followed by a non-polar separation for characterization of organics in aqueous samples by two-dimensional gas chromatography coupled with time-of-flight mass spectrometry are highlighted.
机译：二维气相色谱与飞行时间质谱联用是一种用于识别和定量复杂混合物中化学成分的强大工具。它通常用于分析汽油，喷气燃料，柴油，生物柴油以及生物原油/生物油的有机成分。在大多数这些分析中，分离的第一维是非极性的，然后是极性分离。已经使用相似的色谱柱组合检查了生物原油的含水馏分和来自生物燃料生产的其他含水样品。但是，在分析之前，必须使用样品制备技术，例如衍生化，溶剂萃取和固相萃取。在这项研究中，通过二维气相色谱结合飞行时间质谱对藻类水热液化制得的水相馏分进行了表征，而无需使用先在第一维进行极性分离再进行非极性分离的现有样品制备技术在第二。将此分析的二维图与从更传统的色谱柱配置获得的图进行了比较。详细讨论了藻类生物粗品的水相部分的定性表征结果。突出了在二维气相色谱和飞行时间质谱联用中，先进行极性分离再进行非极性分离来表征水性样品中有机物的优势。

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