Simple and Rapid Determination of the Activation Parameters of Organic Reactions by Temperature-Dependent NMR Spectroscopy I. Application to Irreversible Reactions

1996 ◽  
Vol 69 (7) ◽  
pp. 2031-2038 ◽  
Author(s):  
Masahiro Satoh ◽  
Minoru Hirota
Keyword(s):  
Nmr Spectroscopy ◽  
Rapid Determination ◽  
Activation Parameters ◽  
Organic Reactions ◽  
Temperature Dependent

Rapid determination of sodium hydroxylalkanesulfonate in α-olefin sulfonate by NMR spectroscopy

1974 ◽  
Vol 23 (2) ◽  
pp. 210-212
Author(s):  
Shigeru HASHIMOTO ◽  
Hiroshi TOKUWAKA ◽  
Toshio NAGAI
Keyword(s):  
Nmr Spectroscopy ◽  
Rapid Determination

Rapid determination of total conjugated linoleic acid concentrations in beef by 1 H NMR spectroscopy

2015 ◽  
Vol 41 ◽  
pp. 54-57 ◽  
Author(s):  
Dipesh Prema ◽  
Tyler D. Turner ◽  
Jessica Jensen ◽  
Jessica L. Pilfold ◽  
John S. Church ◽  
...  
Keyword(s):  
Linoleic Acid ◽  
Nmr Spectroscopy ◽  
Conjugated Linoleic Acid ◽  
Rapid Determination ◽  
H Nmr ◽  
Total Conjugated Linoleic Acid

scholarly journals Rapid Determination of Total Thujone in Absinthe Using 1H NMR Spectroscopy

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Yulia B. Monakhova ◽  
Thomas Kuballa ◽  
Dirk W. Lachenmeier
Keyword(s):  
Nmr Spectroscopy ◽  
Rapid Determination ◽  
Previous Method ◽  
Rapid Screening ◽  
H Nmr ◽  
Chromatographic Techniques ◽  
Liquid Liquid Extraction ◽  
Relative Standard ◽  
The Eu

1H NMR spectroscopy is utilized to quantify total thujone (sum of α- and β-isomers) in absinthe. For sample preparation, a simple dilution with buffer is required. Thujone produces a distinct peak of the CH2 group in the cyclopentanone moiety in the 2.13–2.11 ppm range. No overlap with other typical constituents such as anethole or fenchone occurs. The detection limit of 0.3 mg/L is adequate to control the EU maximum limit. The relative standard deviation was 6%, and linearity was observed from 1 to 100 mg/L. Applicability was proven by analysis of 69 authentic absinthes. The correlation between NMR and our previous method consisting of liquid-liquid extraction followed by GC/MS was significant (P<0.0001,R=0.93). The simple and cheap NMR method can be used for rapid screening of absinthes for total thujone content while chromatographic techniques are recommended for more specific (α- and β-thujone isomers) analysis if required.

scholarly journals Rapid Determination of Enantiomeric Excess via NMR Spectroscopy: A Research-Informed Experiment

2016 ◽  
Vol 94 (1) ◽  
pp. 79-84 ◽  
Author(s):  
John S. Fossey ◽  
Eric V. Anslyn ◽  
William D. G. Brittain ◽  
Steven D. Bull ◽  
Brette M. Chapin ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Rapid Determination ◽  
Enantiomeric Excess

Rapid determination of n-6 and n-3 fatty acid ratios in cereal grains and forages by 1H NMR spectroscopy

2016 ◽  
Vol 96 (5) ◽  
pp. 730-733 ◽  
Author(s):  
D. Prema ◽  
J. Jensen ◽  
J.L. Pilfold ◽  
T.D. Turner ◽  
K.K. Donkor ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fatty Acid ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
1H Nmr Spectroscopy ◽  
Rapid Determination ◽  
Cereal Grains ◽  
Nmr Method ◽  
Hydroponically Grown

Herein we describe a new method to rapidly determine the n-6/n-3 fatty acid ratios in cereal grains and forages (hydroponically-grown cereal sprouts and haylage) using 1H nuclear magnetic resonance (NMR) spectroscopy. This NMR method was found to be consistent with more established but time-consuming gas chromatographic methods (R = 0.994).

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