Earth field NMR with chemical shift spectral resolution: Theory and proof of concept

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• 作者：Itai Katz ; Lazar Shtirberg ; Gubrail Shakour ; Aharon Blank ; ^{ab359@tx.technion.ac.il}
• 关键词：Earth field NMR ; Mobile NMR ; Low end NMR
• 刊名：Journal of Magnetic Resonance
• 出版年：2012
• 期刊代码：126_10907807
• 类别：ch
• 出版时间：June, 2012
• 卷：219
• 期：Complete
• 页码：13-24
• 文件大小：961 K

摘要

A new method for obtaining an NMR signal in the Earth鈥檚 magnetic field (EF) is presented. The method makes use of a simple pulse sequence with only DC fields which is much less demanding than previous approaches in terms of the pulses鈥?rise and fall times. Furthermore, it offers the possibility of obtaining NMR data with enough spectral resolution to allow retrieving high resolution molecular chemical shift (CS) information - a capability that was not considered possible in EF NMR until now. Details of the pulse sequence, the experimental system, and our specially tailored EF NMR probe are provided. The experimental results demonstrate the capability to differentiate between three types of samples made of common fluorine compounds, based on their CS data.