Resonance Scattering Detection of Trace Hg 2+  Using Aptamer‐modified AuPd Nanoalloy Probe as Catalyst | Zendy

Liu Qingye | Zendy; Fan Yanyan | Zendy; Liang Aihui | Zendy; Jiang Zhiliang | Zendy

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Resonance Scattering Detection of Trace Hg 2+ Using Aptamer‐modified AuPd Nanoalloy Probe as Catalyst

Author(s) -

Liu Qingye,

Fan Yanyan,

Liang Aihui,

Jiang Zhiliang

Publication year - 2011

Publication title -

chinese journal of chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.28

H-Index - 41

eISSN - 1614-7065

pISSN - 1001-604X

DOI - 10.1002/cjoc.201180314

Subject(s) - chemistry , aptamer , catalysis , analytical chemistry (journal) , detection limit , resonance (particle physics) , nuclear chemistry , nanoparticle , nanotechnology , chromatography , organic chemistry , atomic physics , physics , materials science , genetics , biology

The 5 nm AuPd nanoalloy in mole ratio of Au:Pd=32:1 was prepared, using sodium citrate as the stabilizing agent and NaBH 4 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 Hg 2+ . The AptAuPd‐Hg 2+ aptamer reaction solution was filtrated by membrane, and the AptAuPd in the filtrate exhibited strong catalytic effect on the slow NiP particle reaction between NiCl 2 and NaH 2 PO 2 , and the NiP particles showed a RS peak at 508 nm. The RS intensity decreased when Hg 2+ concentration increased. The decreased RS intensity was linear to Hg 2+ concentration in the range of 0.5–1250 nmol/L. The RS assays were used to determine Hg 2+ in real samples, with good results.

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