13C Dynamic Nuclear Polarization: A Detector for Continuous-Flow, Online Chromatography

Autor:	H. C. Dorn, S. Stevenson
Rok vydání:	1994
Předmět:	Flow monitoring Chromatography Continuous flow Chemistry Gyromagnetic ratio Detector Analytical chemistry Phosphorus-31 NMR spectroscopy Nuclide Polarization (waves) High-performance liquid chromatography Analytical Chemistry
Zdroj:	Analytical Chemistry. 66:2993-2999
ISSN:	1520-6882 0003-2700
Popis:	It is well recognized that NMR nuclides with low magnetogyric ratios (-r) and/or low isotopic natural abundances suffer from sensitivity limitations in many NMR experiments. Applications employing on-line, continuous NMR flow monitoring (e.g., chromatographic detection) of weak NMR nuclides (e.g., 13 C, 15 N, and 29 Si) are limited became of the corresponding poor signal strengh. However, dynamic nuclear polarization (DNP) can alleviate this sensitivity constraint since the DNP signal enhancements are proportional to the electron-to-nuclear magnetogyric ratio (γ e /η n ), witch is on the order of 10 3 -10 4 for most nuclides
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ab6d4a27fb6310ad76a985b52832070a https://doi.org/10.1021/ac00091a003 Zobrazit plný text záznamu