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This paper presents a comparison between surface plasmon resonance (SPR) and capacitive immunosensors for a flow injection label-free detection of cancer antigen 125 (CA 125) in human serum. Anti-CA 125 was immobilized on gold surface through a self-assembled monolayer. Parameters affecting the responses of each system were optimized. Under optimal conditions, SPR provided a detection limit of 0.1Uml...
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