同系物保留指数作为脂肪酸气相色谱定性参数的优越性考察

本文根据五因素系统分组方差分析的实验结果,考察了所提出的同系物保留指数相对于常用的气相色谱定性参数相对保留值、Kovats保留指数的优越性,得到以下结论:同系物保留指数的固定液配比和柱温因素的相对标准差(变异系数)远比相对保留值和Kovats保留指数的对应值小。因而同系物保留指数最精密。由于同系物保留指数更准确地显示了化学物质的色谱行为,故能比Kovats保留指数更可靠地用于鉴定,并将获得更广泛的应用。Kovats保留指数可看成是同系物保留指数用于烷烃的特例。

SURVEY OF THE SUPERIORITY OF HOMOLOGOUS RETENTION INTEX AS A GC CHARACTERIZATION PARAMETER OF FATTY ACIDS

We have been making a survey of the superiority of the Proposed homologous retention index to the usual GC characterization Parameters,the relative retention and the Kovats retention index, based on the analysis of variance of hierarchial data with five sources of variation, and have come to the conclusion that the relative standard deviations of the homologous retention index caused by the factors of concentration of stationary phase and column temperature are much smaller than those of the relative retention and the Kovats retention index. Therefore the homologous retention index is most precise. As the homologous retention index manifests more accurately the chrcmatographic behavior of chemical substances, it can be used more reliably for characterization purposes,and is expected to find broader applicability than the Kovats retention index. The Kovats retention index may be looked on as a special case of the homologous retention index when applied to paraffin hydrocarbons.