De Leersnyder Ilse, Rijckaert Hannes, De Gelder Leen, Van Driessche Isabel, Vermeir Pieter
Department of Green Chemistry and Technology, Laboratory of Chemical Analysis (LCA), Faculty of Bioscience Engineering, Ghent University, 9000 Ghent, Belgium.
Department of Chemistry, Sol-gel Center for Research on Inorganic Powders and Thin film Synthesis (SCRiPTS), Faculty of Sciences, Ghent University, 9000 Ghent, Belgium.
Nanomaterials (Basel). 2020 Jul 17;10(7):1394. doi: 10.3390/nano10071394.
Due to the beneficial properties of silver, it is anticipated that the number of commercially available applications will keep growing during the next decade. In this study, 14 different commercial products that claim to contain solid silver were characterized by visual analysis, UV-VIS spectroscopy, inductive coupled plasma optical emission spectrometry (ICP-OES), scanning transmission electron microscopy with energy dispersive x-ray spectroscopy (STEM-EDX), and dynamic light scattering (DLS). Moreover the variation between production batches-which has never been researched before-was investigated. All four techniques corroborated that some products were highly concentrated and contained spherically-shaped silver nanoparticles (AgNPs), while in others, no (solid) silver was detected or only irregularly-shaped silver particles with a high size polydispersity were present. For almost all products, a significant difference between the claimed and measured silver concentration was detected and a high variability between different production batches of the same product was observed. Our results show the need for a more rigorous approach regarding the manufacturing, labeling, and use of silver-containing products.
由于银具有有益特性，预计在未来十年内，市售含银应用产品的数量将持续增长。在本研究中，通过视觉分析、紫外可见光谱法、电感耦合等离子体发射光谱法（ICP - OES）、配备能量色散X射线光谱仪的扫描透射电子显微镜（STEM - EDX）以及动态光散射（DLS），对14种声称含有固态银的不同商业产品进行了表征。此外，还研究了此前从未研究过的不同生产批次之间的差异。所有这四种技术均证实，一些产品银含量高且含有球形银纳米颗粒（AgNP），而在其他产品中，未检测到（固态）银，或者仅存在尺寸多分散性高的不规则形状银颗粒。对于几乎所有产品，均检测到声称的银浓度与实测银浓度之间存在显著差异，并且观察到同一产品不同生产批次之间存在很大变异性。我们的结果表明，对于含银产品的制造、标签标注及使用，需要采取更为严格的方法。
