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Science 22 December 1995:
Vol. 270. no. 5244, p. 1899
DOI:

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Although nuclear magnetic resonance (NMR) is a powerful structural technique, it is not usually a method of choice for analyzing trace samples. Olson et al. (p. 1967) describe an approach for boosting NMR sensitivity. They have made radio-frequency (rf) coils that are about 0.5 millimeter in diameter and 1 millimeter long and wrapped around microcapillary tubes. The field is sufficiently uniform that spectra with linewidths of about 0.5 hertz can be obtained from nanoliter volume samples. Applications would include detection in capillary separation methods or for mass-limited samples of biomolecules.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)