does anybody know of a reference compound for 31P NMR that doesn't crowd
in with the other peaks in biological systems? The typical reference
compound, 85% phosphoric acid, has a peak in the middle of the chemical
shift range of interest.
I've encountered methylenediphosphonic acid (CH6O6P2) in the literature
(Magnetic Resonance in Medicine 33:795-800; 1995). Has anyone ever used
this? I hope someone can tell me the chemical shift with respect to
phosphoric acid.
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Edward T. Chainani Nuclear Magnetic Resonance Laboratory Manager
National Chemistry Instrumentation Center (NCIC)
Ateneo de Manila University phone: (632) 426-6001 loc. 2309
Loyola Heights, Quezon City e-mail: etch@ginto.chem.admu.edu.ph
Philippines FAX: (632) 426-5985
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