Half-Seed Analysis: Rapid Chromatographic Determination of the Main Fatty Acids of Sunflower Seed*

1989 ◽  
Vol 102 (2) ◽  
pp. 158-165 ◽  
Author(s):  
L. S. Conte ◽  
O. Leoni ◽  
S. Palmieri ◽  
P. Capella ◽  
G. Lercker
Keyword(s):  
Fatty Acids ◽  
Sunflower Seed ◽  
Chromatographic Determination ◽  
Seed Analysis ◽  
Half Seed

Quantitative Gas-Chromatographic Determination of Short-Chain Fatty Acids in Aqueous Samples

1974 ◽  
Vol 20 (9) ◽  
pp. 1235-1237 ◽  
Author(s):  
Dennis P Collin ◽  
Patrick G McCormick ◽  
Milton G Schmitt
Keyword(s):  
Fatty Acids ◽  
Free Acid ◽  
Internal Standard ◽  
Short Chain Fatty Acids ◽  
Chromatographic Determination ◽  
Short Chain ◽  
Aqueous Samples ◽  
Peak Areas ◽  
Chain Fatty Acids

Abstract We report the use of SP-1200 (Supelco Inc.) for quantitative gas-chromatographic determination of short-chain fatty acids (C2-C5) in stool water. The ratio of peak areas for these acids to that for 2-methylvaleric acid (internal standard) is linear for each acid from 60 to 1800 mg/liter. Lactic acid, occasionally present in stool in abnormally high amounts, is not detectable as the free acid on SP-1200, but is determined as its propyl ester on diethyleneglycolsuccinate.

Gas-Liquid Chromatographic Determination of C22 Fatty Acids for the Certification of Low Erucic Acid Varieties of Rapeseeds

1976 ◽  
Vol 59 (4) ◽  
pp. 855-858
Author(s):  
Jean P Barrette
Keyword(s):  
Fatty Acids ◽  
Erucic Acid ◽  
Methyl Esters ◽  
Chromatographic Determination ◽  
Detector Response ◽  
Check Sample ◽  
Liquid Chromatographic Determination ◽  
Low Erucic Acid ◽  
Liquid Chromatographic

Abstract A rapid gas-liquid chromatographic (GLC) procedure was developed for the determination of C22 fatty acids (mostly erucic acid) in rapeseeds containing less than 5% erucic acid. The method involves an oil extraction from a representative sample of rapeseeds, a vigorous boron trifluoride-methanol transesterification of the oil to methyl esters, and analysis by GLC with the aid of an electronic integrator. Six laboratories participated in a monthly check sample program. By adjusting the GLC detector response with 2 synthetic reference standard mixtures containing 1.0 and 3.0% methyl behenate, interlaboratory agreement within 0.3% C22 was consistently obtained.

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