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Spectral editing techniques for 31p NMR spectroscopy of blood

✍ Scribed by Rama Jayasundar; Timothy J. Norwood; Laurance D. Hall; Norman M. Bleehen

Publisher
John Wiley and Sons
Year
1989
Tongue
English
Weight
308 KB
Volume
10
Category
Article
ISSN
0740-3194

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✦ Synopsis

Although the measurement of the pH of biological systems using the 31P NMR response of inorganic phosphate is well known, sometimes in blood absolute determination of the intensity and position of the Pi resonance is precluded by overlap from the doublet resonance of 2,3-diphosphoglycerate. Three techniques which overcome this problem by eliminating the doublet are described and their sensitivity to the experimental parameters is assessed.

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Intensity modulated 31P NMR spectra were obtained using the pulse sequence published by Patt and Shoolery. This attached proton test (APT) technique for signal assignment could be applied to systems with long-range heteronuclear couplings in P- 0-C--H fragments. In a model system derived from the al