Abstract: Disclosed are methods for thermally treating a particle material which used in a chromatographic separation device. The particle material is thermally treated for purposes of controlling and reducing its porosity. Also disclosed are chromatographic separation devices utilizing the thermally treated particle material of the present invention.

Abstract: Disclosed are methods of making a porous particle material for use as stationary media and related chromatographic separation devices utilizing the disclosed stationary media.

Abstract: The invention relates to a method of multiple criteria decision making. In particular, a method of maintaining a complex article is described that includes the steps of; (a) taking a set of options for replacing each of a plurality of components of the complex article, (b) identifying an optimum solution set from the set of possible replacement options of step (a) that best satisfies a plurality of criteria and (c) implementing an optimum solution of the optimum solution set. The step of identifying an optimum solution set comprises the step of evaluating a plurality of potential solutions from the set of possible options defined in step (a) against the plurality of criteria.

Abstract: An advanced silica gel sorbent for use in chromatographic separations that has been chemically modified by surface polycondensation of a trifunctional and/or difunctional organosilane. The chromatographic media exhibits a wider pH range and improved pH stability as compared to other silica gel based sorbents, while retaining all other positive aspects attributed to silica gel based sorbents. A method of forming the advanced silica gel sorbent by Templated Multilayer Inorganic/Organic Grafting.