標題: | A hybrid nanoparticle matrix for mass spectrometry |
作者: | Li, Po-Han Huang, Shin-Yi Chen, Yu-Chie Urban, Pawel L. 應用化學系 應用化學系分子科學碩博班 Department of Applied Chemistry Institute of Molecular science |
公開日期: | 2013 |
摘要: | We demonstrate hybrid inorganic-organic nanoparticles -based on silicon dioxide and 9-aminoacridine- which can enhance mass spectrometric analysis and imaging in the negative-ion mode. The nanoparticles bind to the surface of cells while still in the liquid phase, which is followed by a controlled release of the organic matrix molecules triggered by alkaline ammonia vapours delivered to the specimen in a closed chamber. First, the method was optimized and tested using standard compounds as analytes. Second, the spatial resolution was verified using a natural fibre (diameter similar to 20 mu m). Third, the method was used in the imaging of molecules present in the outer layer of large algal cells (Closterium acerosum). An important advantage of this method is that nanoparticles loaded with organic matrix can be applied to the biological cells as aqueous suspensions; hence, the release and spreading of metabolites can be limited during sample preparation for MALDI-MS. In addition, since this method does not involve spraying, exposure of experimenters to toxic aerosols is decreased. |
URI: | http://hdl.handle.net/11536/21771 http://dx.doi.org/10.1039/c3ra22977g |
ISSN: | 2046-2069 |
DOI: | 10.1039/c3ra22977g |
期刊: | RSC ADVANCES |
Volume: | 3 |
Issue: | 19 |
起始頁: | 6865 |
結束頁: | 6870 |
顯示於類別: | 期刊論文 |