Linearity of the retention time versus carbon number plot for n-alkanes

Wainwright, Mark; Haken, J.K.; Srisukh, D.

doi:10.1016/s0021-9673(00)88435-6

Cited by 24 publications

(2 citation statements)

References 9 publications

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“…R Δ t z values of the n -alkanes have been defined as the ratio A that was used to assess the linearity of n -alkanes in many publications in the 1970s–1980s [29–31]. We found that the relationship between R Δ t z and z [Eq.…”

Section: Resultsmentioning

confidence: 99%

“…Many experimental and theoretical evidences have been well presented for nonlinearity of the plots of log

t_{RZ}^{'}

versus the carbon number not only for small n -alkanes [29–33,38], but also all homolog of n -alkanes [10–18]. Our previous [1] and the present work have shown that the DE and QE models have significantly improved the accuracy of curve fittings in comparison with the LE model for C 3 –C 30 n -alkanes at column temperatures of 24–260°C.…”

Section: Resultsmentioning

confidence: 99%

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A new accurate quadratic equation model for isothermal gas chromatography and its comparison with the linear model

Chen

et al. 2012

Journal of Chromatography A

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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 tM. In the present paper, we propose that the relationship between the adjusted retention time tRZ′ 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.

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Section: Resultsmentioning

confidence: 99%

“…Many experimental and theoretical evidences have been well presented for nonlinearity of the plots of log