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Determination of Carbon Chain Lengths of Fatty Acid Mixtures by Time Domain NMR

机译：时域NMR测定脂肪酸混合物的碳链长度

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摘要

Average carbon chain length is a key parameter that defines the quality of liquid biofuels. In this paper, a method for the determination of carbon chain lengths of fatty acid mixtures is presented. The approach is based on proton relaxation rates measured by time domain nuclear magnetic resonance. The spin-spin relaxation rates R (2) were used for the estimation of the carbon chain lengths. The method was examined for the set of samples with different mean lengths of the main linear carbon chain. Samples were prepared using four different fatty acids and mixtures of two, three or four of these fatty acids. The correlation coefficient between the known and measured values was equal to 0.994. Based on the relaxation theory, a linear-like dependence between the relaxation rate and carbon chain length was briefly shown, which endorses the experimental results. The developed methodology for determining carbon chain lengths offers robustness and rapidity, which are significant advantages when it comes to online use of the method in real industrial environments.
机译：平均碳链长度是定义液体生物燃料的质量的关键参数。本文介绍了一种用于测定脂肪酸混合物的碳链长度的方法。该方法基于时域核磁共振测量的质子松弛率。旋转旋转弛豫速率R（2）用于估计碳链长度。检查具有不同平均线性碳链的不同平均长度的样品的样品。使用四种不同的脂肪酸和两种脂肪酸的混合物制备样品。已知和测量值之间的相关系数等于0.994。基于松弛理论，简要介绍了弛豫率和碳链长之间的线性依赖性，从而提高了实验结果。用于确定碳链长度的开发方法提供了鲁棒性和快速性，这在在线使用实际工业环境中的在线使用时具有显着的优势。

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