title: Evaluation of agarose gel electrophoresis for characterization of silver nanoparticles in industrial products.
abstract: Agarose gel electrophoresis (AGE) has been used extensively for characterization of pure nanomaterials or mixtures of pure nanomaterials. We have evaluated the use of AGE for characterization of Ag nanoparticles (NPs) in an industrial product (described as strong antiseptic). Influence of different stabilizing agents (PEG, SDS, and sodium dodecylbenzenesulfonate), buffers (TBE and Tris Glycine), and functionalizing agents (mercaptosuccinic acid (TMA) and proteins) has been investigated for the characterization of AgNPs in the industrial product using different sizes-AgNPs standards. The use of 1% SDS, 0.1% TMA, and Tris Glycine in gel, electrophoresis buffer and loading buffer led to the different sizes-AgNPs standards moved according to their size/charge ratio (obtaining a linear relationship between apparent mobility and mean diameter). After using SDS and TMA, the behavior of the AgNPs in the industrial product (containing a casein matrix) was completely different, being not possible their size characterization. However we demonstrated that AGE with LA-ICP-MS detection is an alternative method to confirm the protein corona formation between the industrial product and two proteins (BSA and transferrin) maintaining NPs-protein binding (what is not possible using SDS-PAGE).
authors: Environmental Sciences Institute (IUCA), Analytical Spectroscopy and Sensors Group (GEAS), University of Zaragoza, Zaragoza, Spain.
authors: Maria S
authors: MS
authors: Jimenez
authors: Environmental Sciences Institute (IUCA), Analytical Spectroscopy and Sensors Group (GEAS), University of Zaragoza, Zaragoza, Spain.
authors: Jose M
authors: JM
authors: Luque-Alled
authors: Environmental Sciences Institute (IUCA), Analytical Spectroscopy and Sensors Group (GEAS), University of Zaragoza, Zaragoza, Spain.
authors: Teresa
authors: T
authors: Gomez
authors: Environmental Sciences Institute (IUCA), Analytical Spectroscopy and Sensors Group (GEAS), University of Zaragoza, Zaragoza, Spain.
authors: Juan R
authors: JR
authors: Castillo
mesh_terms: D002021:Buffers; D004587:Electrophoresis, Agar Gel / Q000379:methods*; D013058:Mass Spectrometry; D053768:Metal Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D012834:Silver / Q000737:chemistry*; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry
chemical_list: D002021:Buffers; D012967:Sodium Dodecyl Sulfate; D012834:Silver
keywords: Agarose gel electrophoresis; Characterization; Laser-ablation-ICP-MS; Protein corona; Silver nanoparticles