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Title: A simple and rapid method based on anti-aggregation of silver nanoparticles for detection of poly(diallyldimethylammonium chloride) in tap water
Authors: Wichaya Trisaranakul
Apiwat Chompoosor
Weerakanya Maneeprakorn
Duangjai Nacapricha
Nathawut Choengchan
Saowapak Teerasong
King Mongkut's Institute of Technology Ladkrabang
Ramkhamhaeng University
Thailand National Science and Technology Development Agency
Mahidol University
Keywords: Chemistry
Issue Date: 1-Jan-2016
Citation: Analytical Sciences. Vol.32, No.7 (2016), 769-774
Abstract: © The Japan Society for Analytical Chemistry. A simple and rapid method was developed for the detection of poly(diallyldimethylammonium chloride) (PDADMAC) using citrate-capped silver nanoparticles (AgNPs). Detection was based on anti-aggregation of AgNPs in phosphate buffer caused by PDADMAC. Due to its positive charges, PDADMAC was adsorbed onto AgNPs via electrostatic interaction with citrate, which resulted in the charges at the particle surfaces to become positive and caused repulsion among particles. Furthermore, long-chain PDADMAC provided steric hindrance. These two effects promoted the dispersion of AgNPs in the phosphate buffer. A change in the state of dispersion influenced the surface plasmon resonance (SPR) of AgNPs. Therefore, in this work, the concentration of PDADMAC was determined by monitoring changes in absorbance (at 396 nm) caused by SPR of AgNPs. Under optimal conditions, the calibration was linear over the range of 1 to 100 mg L-1with a detection limit of 0.7 mg L-1. Satisfactory precision was obtained (RSD = 2.8%). This method was successfully applied to the determination of PDADMAC in tap water samples. The recoveries ranged from 86.0 - 107.5%.
ISSN: 13482246
Appears in Collections:Scopus 2016-2017

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