...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >Separation and quantification of silver nanoparticles and silver ions using reversed phase high performance liquid chromatography coupled to inductively coupled plasma mass spectrometry in combination with isotope dilution analysis
【24h】

Separation and quantification of silver nanoparticles and silver ions using reversed phase high performance liquid chromatography coupled to inductively coupled plasma mass spectrometry in combination with isotope dilution analysis

机译：反相高效液相色谱-电感耦合等离子体质谱联用同位素稀释分析法分离和定量分析纳米银和银离子

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A reversed phase high performance liquid chromatography coupled to an inductively coupled plasma mass spectrometer (HPLC-ICP-MS) approach in combination with isotope dilution analysis (IDA) for the separation and parallel quantification of nanostructured and ionic silver (Ag) is presented. The main focus of this work was the determination of the ionic Ag concentration. For a sufficient stabilization of the ions without dissolving the nanoparticles (NPs), the eluent had to be initially optimized. The determined Ag ion concentration was in a good agreement with results obtained using ultrafiltration. Further, the mechanism of the NP separation in the HPLC column was investigated. Typical size exclusion effects were found by comparing results from columns with different pore sizes. Since the recovery rates decreased with increasing Ag NP size and large Ag NPs did not elute from the column, additional interactions of the particles with the stationary phase were assumed. Our results reveal that the presented method is not only applicable to Ag NPs, but also to gold and polystyrene NPs. Finally, IDA-HPLC-ICP-MS experiments in single particle mode were performed to determine the particle cut-off size. The comparison with conventional spICP-MS experiments resulted in a similar diameter and particle size distribution. (C) 2016 Elsevier B.V. All rights reserved.
机译：提出了一种反相高效液相色谱仪，结合电感耦合等离子体质谱仪（HPLC-ICP-MS）和同位素稀释分析（IDA），用于分离和平行定量分析纳米结构银和离子银（Ag）。这项工作的主要重点是确定离子银的浓度。为了在不溶解纳米颗粒（NP）的情况下充分稳定离子，必须首先优化洗脱液。所测定的Ag离子浓度与使用超滤获得的结果高度吻合。此外，研究了HPLC色谱柱中NP分离的机理。通过比较具有不同孔径的色谱柱的结果，发现了典型的尺寸排阻效果。由于回收率会随着Ag NP尺寸的增加而降低，并且较大的Ag NPs不会从色谱柱上洗脱下来，因此假定了颗粒与固定相的其他相互作用。我们的结果表明，提出的方法不仅适用于银纳米颗粒，而且还适用于金和聚苯乙烯纳米颗粒。最后，在单颗粒模式下进行IDA-HPLC-ICP-MS实验以确定颗粒截留尺寸。与常规spICP-MS实验的比较得出相似的直径和粒径分布。 （C）2016 Elsevier B.V.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号