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Natural abundant (17) O NMR in a 1.5-T Halbach magnet.
Natural abundant (17) O NMR in a 1.5-T Halbach magnet.
Natural abundant (17) O NMR in a 1.5-T Halbach magnet.
Magn Reson Chem. 2015 Jan 16;
Authors: Sørensen MK, Bakharev ON, Jensen O, Nielsen NC
Abstract
We present mobile, low-field (17) O NMR as a means for monitoring oxygen in liquids. Whereas oxygen is one of the most important elements, oxygen NMR is limited by a poor sensitivity related to low natural abundance and gyro-magnetic ratio of the NMR active (17) O isotope. Here, we demonstrate (17) O NMR detection at a Larmor frequency of 8.74 MHz in a 1.5-T Halbach neodymium magnet with a home-built digital NMR instrument suitable for large-scale production and in-line monitoring applications. The proposed (17) O NMR sensor may be applied for direct, noninvasive measurements of water content in, for example, oil, manure, or food in automated quality or process control. Copyright © 2015 John Wiley & Sons, Ltd.
PMID: 25641664 [PubMed - as supplied by publisher]
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