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学科主题: 分析化学
题名: Immobilized carbon nanotubes as matrix for MALDI-TOF-MS analysis: Applications to neutral small carbohydrates
其他题名: 固定化碳纳米管作为基质用于MALDI-TOF质谱分析: 应用于中性小分子寡糖分析
作者: Ren SF(任士芳) ; Zhang L(张立) ; Cheng ZH(程志红) ; Guo YL(郭寅龙)
通讯作者: 郭寅龙
刊名: J. Am. Soc. Mass Spectrom.
发表日期: 2005
卷: 16, 期:3, 页:333-339
收录类别: SCI
部门归属: 有机化学研究所
英文摘要: In this work, we reported on the advantages of immobilized carbon nanotubes as a novel MALDI-matrix. Recently, carbon nanotubes have been reported to be an effective MALDI matrix for small molecules (Anal. Chem 2003, 75, 6191), as it can eliminate the interfering matrix peaks as well as form a web morphology to fully disperse the analyte and allow strong ultraviolet absorption for enhanced pulsed laser desorption and ionization. In our study, to overcome the problem that the carbon nanotube matrix may fly off from the target, a type of polyurethane adhesive, NIPPOLAN-DC-205, is introduced to immobilize carbon nanotubes on the target, which enables widespread application of carbon nanotubes as matrix for MALDI-MS analysis. At the same time, the properties of the carbon nanotubes as an efficient matrix remained after immobilization. The presence of NIPPOLAN-DC-205 increases the time for analysis at a particular desorption spot by minimizing the time-consuming search for "hot spots" and facilitating experiments such as post source decay (PSD) which need longer-lasting signals. Moreover, NIPPOLAN-DC-205 produces no interference peaks and can easily be cleaned with acetone. Fast evaporation technology may be used to enhance signal reproducibility in MALDI analysis using carbon nanotubes as matrix. Consequently, the applicability of the carbon nanotube as matrix for matrix-assisted laser desorption/ ionization mass spectrometry (MALDI-MS) analysis of low molecular mass analytes is highly improved. The feasibility of the method employing polyurethane is demonstrated by comparison of the results produced from the carbon nanotube matrix with and without immobilization. In addition, neutral small carbohydrates, which are difficult to be ionized normally, can be cationized with high efficiency by MALDI-TOF-MS using the immobilized carbon nanotube matrix. The method was further applied to analyze peptides and detect urine glucose successfully. (J Am Soc Mass Spectrom 2005, 16, 333-339) (C) 2005 American Society for Mass Spectrometry.
语种: 英语
相关网址: 查看原文
WOS记录号: WOS:000227402000006
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/19902
Appears in Collections:分析化学研究室_期刊论文

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Recommended Citation:
Ren SF,Zhang L,Cheng ZH,et al. Immobilized carbon nanotubes as matrix for MALDI-TOF-MS analysis: Applications to neutral small carbohydrates[J]. J. Am. Soc. Mass Spectrom.,2005,16(3):333-339.
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