Abstract: The invention relates to a process for preparing composite particles by encapsulation of an organic-phase-depleted emulsion by polymerization, said emulsion consisting of droplets of inorganic emulsion comprising an organic phase and inorganic nanoparticles distributed in said organic phase, characterized in that the polymerization is carried out using, as the polymerization monomer, from 60% to 100% of at least one crosslinking agent and from 0% to 40% of at least one hydrophobic monomer, it being understood that at least 95% of the crosslinking agent(s) are hydrophobic. The invention further relates to the particles thus obtained, and their use in diagnostics.

Abstract: The present invention relates to a method of preparing a separation medium starting with an aqueous solution of spherical and preferably functionalised primary particles of defined size, comprising the following steps: a) inverse suspension dispersing said aqueous solution of primary particles as droplets in oil; b) evaporation to remove said aqueous solution and fusion between particles to form spherical aggregates; c) size fractionation of aggregates from step b); and optionally d) repeating steps a) to c) an optional number of times to form progressively larger spherical aggregates. The invention also relates to a separation medium produced by this method. The present separation medium can be used in chromatography in the form of essentially spherical aggregates in packed or expanded bed columns or in the form of assembled aggregates on a support for filtration purposes.

Abstract: The present invention relates to a method of preparing a separation medium starting with an aqueous solution of spherical and preferably functionalised primary particles of defined size, comprising the following steps: a) inverse suspension dispersing said aqueous solution of primary particles as droplets in oil; b) evaporation to remove said aqueous solution and fusion between particles to form spherical aggregates; c) size fractionation of aggregates from step b); and optionally d) repeating steps a) to c) an optional number of times to form progressively larger spherical aggregates. The invention also relates to a separation medium produced by this method. The present separation medium can be used in chromatography in the form of essentially spherical aggregates in packed or expanded bed columns or in the form of assembled aggregates on a support for filtration purposes.

Abstract: The present invention relates to a method of preparing a separation medium starting with an aqueous solution of spherical and preferably functionalised primary particles of defined size, comprising the following steps: a) inverse suspension dispersing said aqueous solution of primary particles as droplets in oil; b) evaporation to remove said aqueous solution and fusion between particles to form spherical aggregates; c) size fractionation of aggregates from step b); and optionally d) repeating steps a) to c) an optional number of times to form progressively larger spherical aggregates. The invention also relates to a separation medium produced by this method. The present separation medium can be used in chromatography in the form of essentially spherical aggregates in packed or expanded bed columns or in the form of assembled aggregates on a support for filtration purposes.