A simple and sensitive resonance Rayleigh scattering method for determination of As(III) using aptamer‐modified nanogold as a probe. (9th October 2013)

• Record Type: Journal Article
• Authors: Tang, Meiling; Wen, Guiqing; Liang, Aihui; Jiang, Zhiliang
• Is Part Of: Luminescence. Volume 29:Number 6(2014:Nov./Dec.)
• Page Start: 603
• Page End: 608
• Publication Date: 2013-10-09
• Subjects: Luminescence -- Periodicals; Bioluminescence -- Periodicals; Chemiluminescence -- Periodicals; Luminescence -- Periodicals; 535.35
• DOI: 10.1002/bio.2589
• Languages: English
• ISSNs: 1522-7235

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>A simple and selective aptamer (ssDNA)‐modified nanogold probe (AussDNA) was prepared for the determination of trace As(III) in HEPES buffer solution (pH 8.2) containing 0.05 mol/L NaCl. The method coupled the aptamer reaction of AussDNA–As(III) and the resonance Rayleigh scattering (RRS) of nanogold aggregations at 278 nm. When the As(III) concentration increased, the RRS intensity at 278 nm increased to form more nanogold aggregation and a stable As(III)–ssDNA complex. Under selected conditions, the increased RRS intensity (ΔI) was linear to the concentration of As(III) in the range 3.8–230.4 ng/mL, with a detection limit of 1.9 ng/mL. This RRS method was applied to detect As(III) in water samples, with simplicity, sensitivity and selectivity. Copyright © 2013 John Wiley &amp; Sons, Ltd.</p> </abstract>