| Literature DB >> 21778094 |
Bob C Hamans1, Anna Andreychenko, Arend Heerschap, Sybren S Wijmenga, Marco Tessari.
Abstract
A method to achieve NMR of dilute samples in the earth's magnetic field by applying para-hydrogen induced polarization is presented. Maximum achievable polarization enhancements were calculated by numerically simulating the experiment and compared to the experimental results and to the thermal equilibrium in the earth's magnetic field. Simultaneous 19F and 1H NMR detection on a sub-milliliter sample of a fluorinated alkyne at millimolar concentration (∼10(18) nuclear spins) was realized with just one single scan. A highly resolved spectrum with a signal/noise ratio higher than 50:1 was obtained without using an auxiliary magnet or any form of radio frequency shielding.Entities:
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Year: 2011 PMID： 21778094 DOI： 10.1016/j.jmr.2011.06.011
Source DB: PubMed Journal: J Magn Reson ISSN： 1090-7807 Impact factor: 2.229