Amjad Ali, Maha Khalid Abdulameer, Mohammed H. Mahdi, Khetam Habeeb Rasool, Majid S. Jabir, Faeza H. Zankanah, Hasan Majdi, Aseel Salah Mansoor, Usama Kadem Radi, Rizwan Wahab, Li Guo
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引用次数: 0
Abstract
In the present study, a simple and low-cost spectrophotometric method was reported for the quantification of selenium. The method was based on the surface manipulation of citrate-capped silver nanoparticles by selenium in ammonia-ammonium nitrate buffer solution (pH = 9). Citric acid on the surface of nanoparticles could reduce selenium ions to Se0 atoms which can react with the silver atoms to form Ag2Se surrounding silver particles. This process resulted in the deformation and aggregation of nanoparticles which can be detected by a decrease in response intensity. The effect of important experimental parameters such as pH, buffer type and concentration, volume of silver nanoparticle solution, and incubation time on analytical response were investigated and optimized. Under the optimal conditions, the calibration graph was linear in a concentration range of 0.05 to 0.8 µmol L−1 with a detection limit of 0.024 µmol L −1. The method was successfully used for the selenium analysis in Selen plus ACE capsule, selenium sulfide shampoo, and walnuts with satisfactory results.
期刊介绍:
Plasmonics is an international forum for the publication of peer-reviewed leading-edge original articles that both advance and report our knowledge base and practice of the interactions of free-metal electrons, Plasmons.
Topics covered include notable advances in the theory, Physics, and applications of surface plasmons in metals, to the rapidly emerging areas of nanotechnology, biophotonics, sensing, biochemistry and medicine. Topics, including the theory, synthesis and optical properties of noble metal nanostructures, patterned surfaces or materials, continuous or grated surfaces, devices, or wires for their multifarious applications are particularly welcome. Typical applications might include but are not limited to, surface enhanced spectroscopic properties, such as Raman scattering or fluorescence, as well developments in techniques such as surface plasmon resonance and near-field scanning optical microscopy.