Dielectric and nuclear magnetic resonance properties of a clathrate hydrate of cyclopropane

1969 ◽  
Vol 47 (24) ◽  
pp. 4697-4699 ◽  
Author(s):  
Y. A. Majid ◽  
S. K. Garg ◽  
D. W. Davidson
Keyword(s):  
Phase Diagram ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Dielectric Relaxation ◽  
Proton Magnetic Resonance ◽  
Clathrate Hydrate ◽  
Vapor Pressures ◽  
Relaxation Data ◽  
Resonance Properties ◽  
Recent Phase

Dielectric relaxation data and proton magnetic resonance spectra are given for the structure I clathrate hydrate of cyclopropane. Vapor pressures have been measured along the structure I – structure II – gas equilibrium line missing from the recent phase diagram of Hafemann and Miller.

Proton Magnetic Resonance Spectroscopic Method for Determination of Phenylbutazone and Oxyphenbutazone in Tablets

1988 ◽  
Vol 71 (3) ◽  
pp. 525-527
Author(s):  
Sajid Husain ◽  
M Kifayatullah ◽  
R NAGESWARA RAO
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Proton Magnetic Resonance ◽  
Spectroscopic Method ◽  
Internal Standard ◽  
Aromatic Proton ◽  
British Pharmacopoeia ◽  
Standard Deviations ◽  
Proton Resonances

Abstract A simple, specific, and rapid 'H nuclear magnetic resonance spectroscopic method for the assay of phenylbutazone and oxyphenbutazone is described. Spectra are recorded in CDC13 containing 1,3- dichloro-5-nitrobenzene as an internal standard. The aromatic proton resonances for the standard, at 57.7 and 8.2, are well separated from those of phenylbutazone and oxyphenbutazone, which are in the region of 56.5-7.3 ppm. Average percent recoveries of phenylbutazone and oxyphenbutazone were 98.9 and 98.6 with standard deviations of 0.6 and 0.7, respectively. Commercial formulations were analyzed and the results obtained by the proposed method closely agreed with those found by the British Pharmacopoeia method

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