Abstract: The present invention provides a method for efficiently separating cesium ions in a short time from an aqueous solution with the number of human working steps being reduced as much as possible and recovering the cesium ions, and an apparatus therefor. Cesium ions in an aqueous solution are removed by preparing a cesium ion-containing magnetic particle in a cesium-containing aqueous solution and filtering or magnetically separating the magnetic particle.

Abstract: The present invention provides a method for measuring oocyst of protozoa, such as Cryptosporidium, in an environment sample with high sensitivity at low cost within a short period of time; and a detecting reagent for use therein. Magnetic fine particles of 5 to 500 nm particle diameter having, immobilized thereto, binding factors for specific recognition of oocyst are added to an analyte containing a protozoan oocyst to form oocyst/binding factor/magnetic fine particle complexes by using a binding reaction to the oocyst, the formed complexes are recovered by a magnetic separation, and the protozoan oocysts contained in the complexes are assayed. Further, there is provided, for conducting the above method, a reagent for detecting protozoan oocysts comprising magnetic fine particles of 5 to 500 nm particle diameter having, immobilized thereto, antibodies against oocysts or binding factors for recognizing the antibodies.

Abstract: An object of the present invention is to provide a method for removing cesium ions, where cesium ions in an aqueous solution can be efficiently separated and recovered in a short time, the number of human-performed steps can be decreased as much as possible, and the amount of cesium-containing waste can be reduced. The method for removing cesium ions of the present invention can remove cesium ions in an aqueous solution, comprising adsorbing cesium ions by a water-soluble adsorbent in a cesium-containing aqueous solution, transforming said water-soluble adsorbent having adsorbed thereto cesium ions into a water-insoluble magnetic composite in the presence of a magnetic particle, and magnetically separating said magnetic composite.

Abstract: The present invention provides a method for efficiently separating cesium ions in a short time from an aqueous solution with the number of human working steps being reduced as much as possible and recovering the cesium ions, and an apparatus therefor. Cesium ions in an aqueous solution are removed by preparing a cesium ion-containing magnetic particle in a cesium-containing aqueous solution and filtering or magnetically separating the magnetic particle.

Abstract: The present invention provides a method for measuring oocyst of protozoa, such as Cryptosporidium, in an environment sample with high sensitivity at low cost within a short period of time; and a detecting reagent for use therein. Magnetic fine particles of 5 to 500 nm particle diameter having, immobilized thereto, binding factors for specific recognition of oocyst are added to an analyte containing a protozoan oocyst to form oocyst/binding factor/magnetic fine particle complexes by using a binding reaction to the oocyst, the formed complexes are recovered by a magnetic separation, and the protozoan oocysts contained in the complexes are assayed. Further, there is provided, for conducting the above method, a reagent for detecting protozoan oocysts comprising magnetic fine particles of 5 to 500 nm particle diameter having, immobilized thereto, antibodies against oocysts or binding factors for recognizing the antibodies.