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The 5 nm AuPd nanoalloy in mole ratio of Au:Pd=32:1 was prepared, using sodium citrate as the stabilizing agent and NaBH4 as the reductant. The AuPd nanoalloy was modified by the aptamer to prepare an aptamer‐ AuPd (AptAuPd) probe for resonance scattering (RS) detection of 5.0–1250 nmol/L Hg2+. The AptAuPd‐Hg2+ aptamer reaction solution was filtrated by membrane, and the AptAuPd in the filtrate exhibited...
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