Determination of Milk Fat Adulteration with Vegetable Oils and Animal Fats by Gas Chromatographic Analysis

2015 ◽  
Vol 80 (9) ◽  
pp. C1945-C1951 ◽  
Author(s):  
Jin-Man Kim ◽  
Ha-Jung Kim ◽  
Jung-Min Park
Keyword(s):  
Vegetable Oils ◽  
Milk Fat ◽  
Chromatographic Analysis ◽  
Animal Fats ◽  
Gas Chromatographic Analysis

Detection and Estimation of Animal Fats in Vegetable Oils by Gas Chromatography

1965 ◽  
Vol 48 (6) ◽  
pp. 1186-1191
Author(s):  
Charles L Ettinger ◽  
Anthony J Malanoski ◽  
Herbert Kirschenbaum
Keyword(s):  
Gas Chromatography ◽  
Unsaponifiable Matter ◽  
Vegetable Oils ◽  
Chromatographic Analysis ◽  
Ether Extract ◽  
Detection And Estimation ◽  
Animal Fats ◽  
Animal Fat ◽  
Gas Chromatographic Analysis

Abstract The total unsaponifiable matter of various mixtures of animal fat in vegetable oils was extracted with ether following saponification, and this ether extract was subjected to gas chromatographic analysis. The presence of adulterating animal fats was confirmed by chromatography of their sterol acetates on the same column under the same conditions. The presence of 2.5% animal fats in vegetable oils can be detected, and recoveries range from 83 to 116%.

Gas Chromatographic Determination of 2,4-D and 2,4,5-T and Their Derivatives in Commercial Formulations

1965 ◽  
Vol 48 (2) ◽  
pp. 327-333
Author(s):  
Patricia L Pursley ◽  
E D Schall
Keyword(s):  
Gas Chromatography ◽  
Chromatographic Analysis ◽  
Methyl Esters ◽  
Chromatographic Determination ◽  
Dichlorophenoxyacetic Acid ◽  
Alkyl Esters ◽  
Boron Trichloride ◽  
Acid Gas ◽  
Gas Chromatographic Analysis

Abstract A solution of boron trichloride in methanol was employed for the complete transcsterification of 2,4-D and 2,4,5-T esters to the corresponding methyl esters. Gas chromatographic analysis of the methyl esters permitted mixtures of 2,4-D and 2,4,5-T esters in commercial formidations to be analyzed both qualitatively and quantitatively with no sample cleanup. The method is highly specific and detected the presence of other contaminating isomers of dichlorophenoxyacetic acid. Gas chromatography was also used to qualitatively analyze mixtures of various alkyl esters of 2,4-D.

Gas chromatographic analysis of free fatty acids. Part 2: Determination of free fatty acids during anaerobic putrefaction

1987 ◽  
Vol 7 (5) ◽  
pp. 479-483 ◽  
Author(s):  
S. Pörschmann ◽  
J. Pörschmann ◽  
L. Liebetrau ◽  
I. Kühn ◽  
R. Pätz
Keyword(s):  
Fatty Acids ◽  
Free Fatty Acids ◽  
Chromatographic Analysis ◽  
Gas Chromatographic Analysis
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