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  1. Home
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  3. Scopus
  4. Colorimetric Determination of Al(III) Based on the Aggregation of Gold Nanoparticles Functionalized with Novel 4-Benzoyl Pyrazolone Derivative
 
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Colorimetric Determination of Al(III) Based on the Aggregation of Gold Nanoparticles Functionalized with Novel 4-Benzoyl Pyrazolone Derivative

Journal
Open Access
AIP Conference Proceedings
Date Issued
2018
Author(s)
Abubaker M.
Che Wan Zanariah Che Wan Ngah 
Universiti Sains Islam Malaysia 
Ahmad M.
Kuswandi B.
DOI
10.1063/1.5041233
Abstract
A sensitive and selective colorimetric method has been developed for detection of Al3+ ion using 4-benzoyl pyrazolone-functionalized gold nanoparticles (BMPBP-AuNPs) as novel colorimetric probes. The BMPBP-AuNPs were characterized by UV-visible spectrometry and transmission electron microscopy (TEM). It was found that the addition of the Al3+ ions led to a rapid aggregation of the BMPBP-AuNPs, which changed the color of the mixture from red to blue. Furthermore, there was a shift in the characteristic surface plasmon resonance (SPR) peak from 524 to 650 nm of BMPBP-AuNPs, which confirmed that a good linear relation (R2 = 0.9935) was present between the absorption ratio of 524 and 650 nm. Also, the assay detected the Al3+ ion concentrations in the linear range 0-12 ppm with the detection limit is 0.05 ppm. Finally, the synthesized BMPBP-AuNPs were successfully used as a colorimetric sensor for the selective and sensitive detection of the Al3+ ions in water samples.
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