Analytical Chemistry Division, National Institute for Standards and Technology, Gaithersburg, MD 20899-8395, USA.
Anal Bioanal Chem. 2011 Jan;399(1):509-17. doi: 10.1007/s00216-010-4275-6. Epub 2010 Oct 15.
A material containing single-wall carbon nanotubes (SWCNTs) with other carbon species, catalyst residues, and trace element contaminants has been prepared by the National Institute of Standards and Technology for characterization and distribution as Standard Reference Material SRM 2483 Carbon Nanotube Soot. Neutron activation analysis (NAA) and inductively coupled plasma mass spectrometry (ICP-MS) were selected to characterize the elemental composition. Catalyst residues at percentage mass fraction level were determined with independent NAA procedures and a number of trace elements, including selected rare earth elements, were determined with NAA and ICP-MS procedures. The results of the investigated materials agreed well among the NAA and ICP-MS procedures and good agreement of measured values with certified values was found in selected SRMs included in the analyses. Based on this work mass fraction values for catalyst and trace elements were assigned to the candidate SRM.
一种含有单壁碳纳米管（SWCNTs）、其他碳物种、催化剂残留物和痕量元素污染物的材料，已由美国国家标准与技术研究院制备出来，用于作为标准参考物质 SRM 2483 碳纳米管烟尘进行特性描述和分布。中子活化分析（NAA）和电感耦合等离子体质谱法（ICP-MS）被选来对元素组成进行表征。使用独立的 NAA 程序测定了催化剂残留物的质量分数水平，并用 NAA 和 ICP-MS 程序测定了包括一些稀土元素在内的多种痕量元素。在所研究的材料中，NAA 和 ICP-MS 程序的结果之间具有很好的一致性，并且在分析中包含的选定标准物质中，发现了测量值与认证值之间的良好一致性。基于这项工作，候选标准物质被赋予了催化剂和痕量元素的质量分数值。
