Determination of structure of unsaturated fatty acid positional isomers

1965 ◽  
Vol 42 (4) ◽  
pp. 326-329 ◽  
Author(s):  
R. A. Stein
Keyword(s):  
Fatty Acid ◽  
Unsaturated Fatty Acid ◽  
Positional Isomers

Determination of Saturated and Unsaturated Fatty Acids: Comparison of Gas-Liquid Chromatographic, Thiocyanogen Number, and Lead Salt-Ether Methods

1968 ◽  
Vol 51 (1) ◽  
pp. 20-23
Author(s):  
Denis E Lacroix ◽  
A R Prosser ◽  
A J Sheppard
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Unsaturated Fatty Acid ◽  
Unsaturated Fatty Acids ◽  
Fats And Oils ◽  
Lead Salt ◽  
Poor Agreement ◽  
Thiocyanogen Number ◽  
Liquid Chromatographic

Abstract The weight per cent composition of the C16—Cis series of fatty acids in edible vegetable oils was determined by GLC, lead salt-ether, and thiocyanogen number methods. Total saturated and unsaturated fatty acid percentages obtained by GLC and the lead salt-ether methods were in poor agreement; the lead salt-ether unsaturated fatty acid percentages tended to be higher than the GLC values. The thiocyanogen number values for unsaturation were higher than GLC values lor every fat and oil analyzed except one. The polyunsaturated fatty acid percentages obtained by the thiocyanogen number method were not similar to the GLC values for about half of the fats and oils examined.

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