Liejun Wu, Xiaojuan Duan, Chuanyu Liu, Guangxiang Zhang and Qing X. Li
J. Sep. Sci. 2016, 39, 2785–2795
This cover picture depicts explicit recognitions of dual- and single-retention behaviors of solutes caused by initial temperature (To) and heating rate (rT) in programmed temperature gas chromatography (PTGC). The retention affected by To follows an exponential isothermal model. When To becomes negligible and rT solely dominates, the retention explicitly obeys a cubic equation model in the singlemodel region. Coexistence of both To and rT influences causes dual retention behaviors in the dual model region. Such dual and single retention behaviors were well demonstrated with five homologue series of n-alkanes, 1-alkenes, 1-alkyl alcohols, alkyl benzenes and fatty acidmethyl esters. Thiswork presents a framework for further advancement of PTGC theory and practices.