Chromatographic efficiency of polar capillary columns applied for the analysis of fatty acid methyl esters by gas chromatography was written by Waktola, Habtewold D.;Mjos, Svein A.. And the article was included in Journal of Separation Science in 2018.Recommanded Product: Methyl nonadecanoate The following contents are mentioned in the article:
The chromatog. efficiency that could be achieved in temperature-programmed gas chromatog. was compared for four capillary columns that are typically applied for anal. of fatty acid Me esters (FAME). Three different carrier gases, hydrogen, helium and nitrogen, were applied. For each experiment, the carrier gas velocities and the temperature rates were varied with a full 9 × 3 design, with nine levels on the carrier gas velocity and temperature rates of 1, 2 or 3°/min. Response surface methodol. was used to create models of chromatog. efficiency as a function of temperature rate and carrier gas velocity. The chromatog. efficiency was defined as the inverse of peak widths measured in retention index units. The final results were standardized so that the efficiencies that could be achieved within a certain time frame, defined by the retention time of the last compound in the chromatogram, could be compared. There were clear differences in the efficiencies that could be achieved with the different columns and that the efficiency decreased with increasing polarity of the stationary phase. The differences can be explained by higher resistance to mass transfer in the stationary phase in the most polar columns. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Recommanded Product: Methyl nonadecanoate).
Methyl nonadecanoate (cas: 1731-94-8) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Acyl chlorides and acid anhydrides alcoholysis is another way to produce esters. Acyl chlorides and acid anhydrides react with alcohols to produce esters. Anydrous conditions are recommended since both acyl chlorides and acid anhydrides react with water.Recommanded Product: Methyl nonadecanoate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics