Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, HI 96822, USA.
J Chromatogr A. 2012 Oct 19;1260:224-31. doi: 10.1016/j.chroma.2012.08.071. Epub 2012 Aug 28.
The gas holdup time (tM) is a dominant parameter in gas chromatographic retention models. The difference equation (DE) model proposed by Wu et al. (J. Chromatogr. A 2012, http://dx.doi.org/10.1016/j.chroma.2012.07.077) excluded t(M). In the present paper, we propose that the relationship between the adjusted retention time t'RZ and carbon number z of n-alkanes follows a quadratic equation (QE) when an accurate tM is obtained. This QE model is the same as or better than the DE model for an accurate expression of the retention behavior of n-alkanes and model applications. The QE model covers a larger range of n-alkanes with better curve fittings than the linear model. The accuracy of the QE model was approximately 2-6 times better than the DE model and 18-540 times better than the LE model. Standard deviations of the QE model were approximately 2-3 times smaller than those of the DE model.
持气时间（tM）是色谱保留模型中的一个主要参数。Wu 等人提出的差分方程（DE）模型排除了 t（M）。在本文中，我们提出当获得准确的 tM 时，调整保留时间 t'RZ 与正构烷烃碳数 z 的关系遵循二次方程（QE）。当准确地表达正构烷烃的保留行为和模型应用时，该 QE 模型与 DE 模型相同或更好。QE 模型涵盖了更大范围的正构烷烃，具有比线性模型更好的曲线拟合。QE 模型的准确性比 DE 模型好约 2-6 倍，比 LE 模型好约 18-540 倍。QE 模型的标准偏差比 DE 模型小约 2-3 倍。
