Местоположение издательства:New York, United States
Первая страница:3091
Последняя страница:3104
Аннотация:A chromatographic behaviour of five deoxyribonucleousides( d.Cyd, dUrd, dGuo, dThd. and dAdo) has been studed under isocratic conditions of reversed-phase HPLS. The Waters column packed by 10μm μ-Bondapak C18 was used. The volume fraction (F) of organic modifier was chanched from 0.05 to 0.30, and to 0,12 for methanol acetonitrile, repectively. Futhermore, the capacity factors with a mobile phase of 100 % water ( K'w ) have been measured. Linear regression has been carried out for the log k' vs. F data and the intercepts and the plots were calculated. The slope magnitudes of different solutes were almost the same for each organic modifier. In all casese, the experimentalvalues of k'w were higher than extrapolated ones. For each solute extrapolation of log k' vs F gives practically the same intercept values for both organic modifiers. It was concluded that the intercepts calculated in the region of small content of organic modifier are independent on the nature of organic modifier and correlate with deoxyribonucleosides nature only.