Characterization of cis- and trans-octadecenoic acid positional isomers in edible fat and oil using gas chromatography–flame ionisation detector equipped with highly polar ionic liquid capillary column

Exploring the Use of Ionic Liquid Mixtures to Enhance the Performance of Dicationic Ionic Liquids

“…In these latter cases a double-stimulated echo sequence was used to suppress convection artifacts. 41 Recovery delays d1 of 5-12 s, gradient pulses durations δ of 2-3 ms, and diffusion delay of 50-300 ms were used. The gradient strength g was linearly increased from 2 up to 900 G cm −1 as needed.…”

Regiospecific Distribution of <i>trans</i>-Octadecenoic Acid Positional Isomers in Triacylglycerols of Partially Hydrogenated Vegetable Oil and Ruminant Fat

“…Determination of the individual trans-C18:1 positional isomers was accomplished by a GC-FID system TRACE GC Ultra equipped with an SLB-IL111 capillary column 100 m 0.25 mm i.d., 0.20 μm thickness, Supelco, Bellefonte, PA, USA . This procedure was based on the authors previous method 22 . Both the injector and detector temperatures were set to 250 .…”

“…To overcome these problems, we recently developed a new analytical method that provides good resolution for all potential isomers using a highly ionic liquid capillary column for gas chromatography-flame ionization detection GC-FID 22 .…”

<i>Trans</i>-octadecenoic Acid Positional Isomers Have Different Accumulation and Catabolism Properties in Mice

“…To clarify whether trans-18:1 isomers influence each other s uptake into organs, we fed mice a TFA mixture containing equal amounts of 9t, 10t, and 11t-18:1* for 3 weeks. Separation of 9t, 10t, and 11t-18:1* was achieved using a GC-FID equipped with a SLB-IL111 column, as previously described 28 . Figure 2 shows the labeled-TFA content in lipids from each tissue.…”