| 主权项 |
1. A crosslinked organic porous particle comprising a crosslinked organic polymer that provides a crosslinked organic solid phase including an external particle surface and first and second discrete pores that are isolated from each other and dispersed and enclosed entirely within the crosslinked organic solid phase, the first and second discrete pores having an average size greater than or equal to 0.1 μm, and the mode particle size of the crosslinked organic porous particles is at least 3 μm and up to and including 100 μm, and the crosslinked organic solid phase further comprises a low HLB emulsifier that is selected from the group consisting of sorbitan esters of fatty acids, polyethylene oxide esters of fatty acids, tetrafunctional block copolymer with terminal secondary hydroxyl groups, and polyglycerol polyricinoleate,
wherein the crosslinked organic porous particle further comprises a first marker material that is present within only the volume of the first discrete pores, and the volume of the second discrete pores is either empty of marker materials or is at least partially occupied by a second marker material, which first and second marker materials are detectably different, and the crosslinked organic porous particles has a porosity of at least 1% and up to and including 80% of total crosslinked organic porous particle volume. |
