| 摘要 |
PCT No. PCT/FR94/01099 Sec. 371 Date Mar. 11, 1996 Sec. 102(e) Date Mar. 11, 1996 PCT Filed Sep. 20, 1994 PCT Pub. No. WO95/08769 PCT Pub. Date Mar. 30, 1995A method for determining an analyte in a sample which includes: providing the sample in liquid phase, the analyte of which has a ligand having at least one anti-ligand specific recognition site; providing at least one reagent containing metal particles, in suspension in liquid phase and non-separable from the liquid phase by a magnetic or electromagnetic force, each particle containing a metal core to which at least one anti-ligand is fixed directly or indirectly; contacting the sample and the at least one reagent in order to obtain metal clusters; placing the metal clusters in a magnetic field generated by a magnetic or magnetic field generating sensor in order to assemble the metal clusters; and detecting the assembled metal clusters to obtain a signal representative of the mass of metal in the clusters, which is correlated with the quantity of analyte present in the sample initially. A device for determining an analyte in a sample by the above process is also included.
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