Isocoproporphyrin: nuclear-magnetic-resonance- and mass-spectral methods for the determination of porphyrin structure

1973 ◽  
Vol 131 (4) ◽  
pp. 625.b3-625.b3
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Spectral Methods ◽  
Mass Spectral ◽  
Nuclear Magnetic

scholarly journals Isocoproporphyrin: nuclear-magnetic-resonance- and mass-spectral methods for the determination of porphyrin structure

1973 ◽  
Vol 131 (2) ◽  
pp. 429-432 ◽  
Author(s):  
M. S. Stoll ◽  
G. H. Elder ◽  
D. E. Games ◽  
P. O'Hanlon ◽  
D. S. Millington ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Spectral Methods ◽  
Reductive Alkylation ◽  
New Techniques ◽  
Mass Spectral ◽  
Shift Reagents ◽  
Nuclear Magnetic

The use of ‘shift reagents’ in the determination of n.m.r. spectra, and of reductive alkylation in combination with g.l.c.–mass spectrometry, facilitates assignment of the order of substituents in porphyrins, and the application of these new techniques to isocoproporphyrin is described.

Oil content of cotton seed in Northern Nigeria: 1. Assessment of nuclear magnetic resonance for the determination of the oil percentage of cotton seed

1977 ◽  
Vol 88 (3) ◽  
pp. 727-729 ◽  
Author(s):  
J. B. Smithson ◽  
H. E. Gridley
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Cotton Seed ◽  
Oil Content ◽  
Northern Nigeria ◽  
Local Varieties ◽  
Oil Percentage ◽  
Conventional Solvent Extraction ◽  
Nuclear Magnetic

SUMMARYThe oil content of a number of introduced and local varieties was determined using three nuclear magnetic resonance oil analysers at different centres and compared with results from conventional solvent extraction. Differences were evident between the three centres and between the techniques but in both cases the rankings were similar.

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