Abstract: The present invention relates to a method for simulating a chromatographic run on a chromatograph (5) with a computation device (3) comprising at least one processor (7) and an associated digital memory (9), wherein the chromatographic run uses a mobile phase (31) comprising a mixture of at least two eluent constituents having different chromatographic properties and forming an eluent profile (33). The invention also relates to a computer program for performing the method, and an apparatus comprising a computation device and a chromatograph for performing the method.

Abstract: The present invention relates to a method for simulating a chromatographic run on a chromatograph (5) with a computation device (3) comprising at least one processor (7) and an associated digital memory (9), wherein the chromatographic run uses a mobile phase (31) comprising a mixture of at least two eluent constituents having different chromatographic properties and forming an eluent profile (33). The invention also relates to a computer program for performing the method, and an apparatus comprising a computation device and a chromatograph for performing the method.

Abstract: The present invention provides an apparatus that can be used to connect a flash chromatography instrument to a fraction collector and a mass detector to perform mass-directed flash chromatography.

Abstract: The invention relates to an application drum for use in the production of absorbent articles. The application drum has a longitudinal axis of rotation and comprises material engagement means on the outside thereof for both collecting and delivering a material component. In order to be able to use only a single drum and still be able to place material components more to one or the, other side of the center-line of a conveyor belt, the material engagement means is arranged for reciprocal movement with respect to the drum in a direction parallel to the axis of rotation of the drum.