Gas-chromatographic method for the determination of volatile fatty acids (C1–C7) and lactic acid

The Analyst ◽  
1984 ◽  
Vol 109 (2) ◽  
pp. 179-180 ◽  
Author(s):  
A. T. G. Steverink
Keyword(s):  
Fatty Acids ◽  
Lactic Acid ◽  
Volatile Fatty Acids ◽  
Chromatographic Method ◽  
Gas Chromatographic Method

Determination of soluble carbohydrates, lactic acid and volatile fatty acids in soils and biological media

1929 ◽  
Vol 19 (4) ◽  
pp. 649-655 ◽  
Author(s):  
V. Subrahmanyan
Keyword(s):  
Fatty Acids ◽  
Lactic Acid ◽  
Volatile Fatty Acids ◽  
Soluble Carbohydrates ◽  
Biological Media ◽  
Factors Affecting

Methods for extraction, concentration and determination of minute quantities of soluble carbohydrates, lactic acid and volatile fatty acids have been described. Different factors affecting the accuracy of the determinations have been studied and corrections, where necessary, have been suggested.

Instability of Propyl Lactate Prepared by Boron Trifluoride-Catalyzed Esterification of Lactic Acid

1972 ◽  
Vol 55 (4) ◽  
pp. 888-889
Author(s):  
Walter F Staruszkiewicz ◽  
John F Bond
Keyword(s):  
Lactic Acid ◽  
Ethyl Ether ◽  
Boron Trifluoride ◽  
Chromatographic Method ◽  
Published Data ◽  
Chromatographic System ◽  
Propyl Esters ◽  
Gas Chromatographic Method ◽  
Hydrolysis Of

The official first action gas chromatographic method for the determination of lactic, β-hydroxyhutyric, and succinic acids, 17.034–17.038, requires the formation of their propyl esters with boron trifluoride-1-propanol and extraction of the esters into an organic solvent prior to chromatography. Previously published data showed that the solutions of propyl esters were stable for as long as 4 weeks when they were extracted into chloroform and stored at 40°F. However, when ethyl ether is substituted for chloroform, propyl lactate is no longer stable during storage. The ether apparently extracts some unreacted boron trifluoride which eventually causes the hydrolysis of propyl lactate. The propyl esters of β-hydroxybutyric, levulinic, and succinic acids were stable in ether as well as in chloroform. The method has been revised to include the use of ethyl ether, if required by the gas chromatographic system, and to specify analysis of the ether solutions within 24 hr of esterification.

A rapid gas chromatographic method for the quantitation of volatile fatty acids in urine

1973 ◽  
Vol 81 (1) ◽  
pp. 65-69 ◽  
Author(s):  
B.F. Gibbs ◽  
K. Itiaba ◽  
J.C. Crawhall ◽  
B.A. Cooper ◽  
O.A. Mamer
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Chromatographic Method ◽  
Gas Chromatographic Method
Sign in / Sign up

Export Citation Format

Share Document