Gas-liquid chromatography of derivatives of naturally-occurring mixtures of long-chain polyisoprenoid alcohols

1966 ◽  
Vol 23 ◽  
pp. 51-60 ◽  
Author(s):  
A.R. Wellburn ◽  
F.W. Hemming
Keyword(s):  
Liquid Chromatography ◽  
Gas Liquid Chromatography ◽  
Naturally Occurring ◽  
Derivatives Of ◽  
Long Chain

scholarly journals Gas-liquid chromatography of dialkyl, alkyl acyl, and diacyl derivatives of glycerol

1969 ◽  
Vol 10 (1) ◽  
pp. 128-131
Author(s):  
Randall Wood ◽  
W.J. Baumann ◽  
Fred Snyder ◽  
H.K. Mangold
Keyword(s):  
Liquid Chromatography ◽  
Gas Liquid Chromatography ◽  
Derivatives Of

Screening for urinary oligosaccharides: a quantitative procedure.

1978 ◽  
Vol 24 (4) ◽  
pp. 669-674 ◽  
Author(s):  
P Purkiss ◽  
R C Hughes ◽  
R W Watts
Keyword(s):  
Liquid Chromatography ◽  
Age Groups ◽  
Normal Subjects ◽  
Gel Chromatography ◽  
Gas Liquid Chromatography ◽  
Complex Carbohydrates ◽  
Derivatives Of ◽  
Quantitative Procedure ◽  
Urinary Oligosaccharides

Abstract A method for screening urine for abnormalities in glycoconjugate excretion is presented. An oligosaccharide-containing fraction is isolated from urine by gel chromatography and the carbohydrate-containing components in this fraction are degraded to monosaccharides, suitable derivatives of which are analyzed by gas-liquid chromatography. A pattern which characterizes the monosaccharides originating in complex carbohydrates in urine is thus obtained. Data obtained by applying this method to normal subjects in various age groups are presented and the applicability of the method and its limitations are illustrated by the use of examples from patients with previously diagnosed disorders of glycoconjugate metabolism.

Separation and Analysis of the Pyrethrins by Combined Gas-Liquid Chromatography-Chemical Ionization Mass Spectrometry

1977 ◽  
Vol 60 (3) ◽  
pp. 685-689 ◽  
Author(s):  
Roy L Holmstead ◽  
David M Soderlund
Keyword(s):  
Mass Spectrometry ◽  
Liquid Chromatography ◽  
Chemical Ionization ◽  
Ionization Mass Spectrometry ◽  
Chemical Ionization Mass Spectrometry ◽  
Gas Liquid Chromatography ◽  
Ionization Mass ◽  
Total Extract ◽  
Naturally Occurring ◽  
Selective Ion Monitoring

Abstract Pyrethrins, the 6 naturally occurring insecticidal esters of pyrethrum extract, were analyzed by combined gas-liquid chromatography-chemical ionization mass spectrometry. Separation was best on an OV-25 column with temperature programming. The chemical ionization mass spectra for the 6 esters as well as for the thermally isomerized pyrethrins I and II are reported and discussed. Using selective ion monitoring, a lower limit of detectability of all 6 esters was 114 ng of total extract injected on the column.

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