Liquid chromatographic analysis of nucleosides and their mono-, di- and triphosphates using porous graphitic carbon stationary phase coupled with electrospray mass spectrometry

2004 ◽  
Vol 18 (14) ◽  
pp. 1599-1606 ◽  
Author(s):  
Jinsong Xing ◽  
Atsu Apedo ◽  
Adrienne Tymiak ◽  
Ning Zhao
Keyword(s):  
Mass Spectrometry ◽  
Stationary Phase ◽  
Chromatographic Analysis ◽  
Electrospray Mass Spectrometry ◽  
Porous Graphitic Carbon ◽  
Graphitic Carbon ◽  
Liquid Chromatographic Analysis ◽  
Liquid Chromatographic

scholarly journals Diabolic acids: occurrence and identification in natural products and their metabolism by simple-stomached and ruminant animals

1981 ◽  
Vol 45 (1) ◽  
pp. 159-165 ◽  
Author(s):  
G. P. Hazlewood ◽  
A. J. Northrop ◽  
R. M. C. Dawson
Keyword(s):  
Mass Spectrometry ◽  
Natural Products ◽  
Homologous Series ◽  
Chromatographic Analysis ◽  
Low Resolution ◽  
Tissue Samples ◽  
Ruminant Animals ◽  
Liquid Chromatographic Analysis ◽  
Liquid Chromatographic ◽  
Resolution Mass

1. A method for gas-liquid chromatographic analysis of the dimethyl esters of a homologous series of diabolic acids is described.2. Only when combined with low-resolution mass spectrometry could the method be used to show unequivocally the existence of diabolic acids in natural products.3. Diabolic acids occurred naturally in rumen and faecal lipids of all ruminants examined but could not be detected in a number of ruminant tissue samples.4. Infused 14C-labelled (C16:0)2 diabolic acid was poorly absorbed by both simple-stomached and ruminant animals. Oxidation was more extensive in the ruminant, but there was no evidence of deposition of diabolic acid in the tissues of either animal.

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