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We report a new type of potentiometric immunosensor for the determination of human α-fetoprotein (AFP). Gelatin–silver film as gentle carrier was used to immobilize anti-AFP on the surface of platinum disk electrode. The effective immobilization of the antibody comes from the entrapment by the gelatin film and graft by silver nanoparticles. Glutaraldehyde was employed to improve the character of complex...
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