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All Journal Indonesian Journal of Chemistry
Adhi Maulana Yusuf
Research Centre for Chemistry, National Research and Innovation Agency (BRIN), Kawasan Puspiptek, Building 452, Serpong, Banten 15314, Indonesia; Department of Chemical Engineering, Institut Teknologi Indonesia, Jl. Raya Puspiptek, Serpong, Banten 15
Chemical Engineering, Chemistry & Bioengineering Chemistry

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The Comparative of α- and β-Cyclodextrin as Stabilizing Agents on AuNPs and Application as Colorimetric Sensors for Fe3+ in Tap Water Adhi Maulana Yusuf; Satrio Kuntolaksono; Agustina Sus Andreani
Indonesian Journal of Chemistry Vol 23, No 6 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.83796

Abstract

In this study, AuNPs were reduced using ortho-hydroxybenzoic acid (o-HBA) and various stabilizing agents (α-CDs and β-CDs). The stability, shape, size, and sensitivity of the Fe3+ detection of AuNPs α-CDs and AuNP β-CDs are compared. Both nanomaterials were characterized using ultraviolet-visible (UV-vis) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, and transmission electron microscopes (TEM). After the addition of Fe3+, the absorption rate of surface plasma resonance (SPR) increased to 524 nm, and the color of AuNPs α-CDs and AuNPs β-CDs was changed from pink to red and purple, respectively. AuNPs α-CDs are more uniform in shape and size than AuNPs β-CDs with a size of 23.34 nm. Further, AuNPs α-CDs are more stable, and the absorption rate at 524 nm wavelength decreases by 17.76%. AuNPs α-CDs have a good linear relationship with a linear regression coefficient of 0.996. The sensitivity of AuNPs α-CDs was good with LoD and LoQ both with 1.21 and 4.02 ppm, respectively. These results show that the sensor is superior in determining Fe3+. In addition, AuNPs α-CDs were used to detect Fe3+ in the tap water in South Tangerang, Banten, Indonesia.
Co-Authors Agustina Sus Andreani Satrio Kuntolaksono