NDLI: A colorimetric probe for the detection of aluminum ions based on 11-mercaptoundecanoic acid functionalized gold nanoparticles

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A colorimetric probe for the detection of aluminum ions based on 11-mercaptoundecanoic acid functionalized gold nanoparticles

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A colorimetric probe for the detection of aluminum ions based on 11-mercaptoundecanoic acid functionalized gold nanoparticles

Content Provider	Royal Society of Chemistry (RSC)
Author	Song, Jinping Ma, Qi Shuang, Shaomin Dong, Chuan Yang, Jun Zhu, Ruiqi Zhou, Ying
Copyright Year	2016
Abstract	An easy, simple and selective colorimetric method for aluminum ions has been developed using 11-mercaptoundecanoic acid functionalized gold nanoparticles (MUA–AuNPs). The MUA–AuNPs could be induced to aggregate in the presence of Al3+ ions according to the chelation effect between the carboxyl group and Al3+, and a color change from red to purple with increasing Al3+ ion concentration was observed. The plasmon absorbance of the MUA–AuNPs allows the quantitative detection of Al3+ ions. A sensitive linear correlation existed between the ratio of absorbance at 650 nm to that at 520 nm and the Al3+ ion concentration ranging from 10−6 M to 10−4 M. The detection limit was 5.7 × 10−7 M, which is below the maximum recommended contamination level of the World Health Organization (WHO) for the aluminum content (7.4 μM) in drinking water. The MUA–AuNPs chelated with Al3+ showed excellent selectivity in the presence of EDTA compared to other metal ions (Ag+, Ba2+, Ca2+, Cd2+, Cr3+, Cu2+, Fe2+, Hg2+, Mg2+, Mn2+, Ni2+, Pb2+ and Zn2+). The proposed method can offer the additional advantage of the efficient determination of Al3+ ions in drinking water, and the recovery was in the range of 98.5–101.6% with a relative standard deviation below 2%.
Starting Page	7232
Ending Page	7236
Page Count	5
File Format	HTM / HTML PDF
ISSN	17599660
Volume Number	8
Issue Number	39
Journal	Analytical Methods
DOI	10.1039/c6ay02194h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Ethylenediaminetetraacetic acid Acid World Health Organization Carboxylic acid MUA Ion Coefficient of variation
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Engineering Chemical Engineering

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