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Light Guide for NMR Spectrometers

IP.com Disclosure Number: IPCOM000051852D
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Bargon, J: AUTHOR [+3]

Abstract

The signal in nuclear magnetic resonance (NMR) can be increased by inserting a rod 10 into the spinning NMR sample tube 12 and passing ultraviolet (UV) light through the rod 10 into the liquid sample 14. Preferably, the end of the rod 10 is cut at an angle. The rod 10 induces a flow in the liquid sample 14 in the active NMR coil 16 area, and at the same time the UV light photoexcites the sample 14. This arrangement is particularly suitable for samples containing either 13-carbon or 15-nitrogen nuclei with long relaxation times.

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Light Guide for NMR Spectrometers

The signal in nuclear magnetic resonance (NMR) can be increased by inserting a rod 10 into the spinning NMR sample tube 12 and passing ultraviolet (UV) light through the rod 10 into the liquid sample 14. Preferably, the end of the rod 10 is cut at an angle. The rod 10 induces a flow in the liquid sample 14 in the active NMR coil 16 area, and at the same time the UV light photoexcites the sample 14. This arrangement is particularly suitable for samples containing either 13-carbon or 15-nitrogen nuclei with long relaxation times.

Whereas the use of a rod cut at an angle achieves a threefold signal/noise improvement over a rod with a straight end in the absence of UV light in one particular system, the use of UV light in the same system achieves a tenfold signal/noise improvement. More drastic signal/ noise improvements have been found for nuclei other than this 13-carbon example.

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