Brief description improved making it possible to vary a gradient of eluents in a liquid phase chromatography

摘要

P apparatus and process which makes it possible to produce a gradient between two eluants. / p & & p & it is possible to vary the characteristics of shape or of the slope of the gradient in order to adapt it to a given application of the devices are provided in order to lengthen or shorten the time interval of the gradient while maintemant its shape in a wide range of values. In a preferred embodiment, the apparatus comprises means for controlling the shape of the gradient of renovation (recovery of the initial ratio of the eluants) in order to avoid any shock which is capable of affecting the chromatographic column. / p & & p & application: chemical analysis by chromatography. / p