Response Factor Correction for Estimation of Ester Content in Biodiesel was written by Singh, Dheer;Chopra, Anju;Kumar, Ravindra;Sastry, M. I. S.;Patel, M. B.;Basu, B.. And the article was included in Chromatographia in 2014.Quality Control of Methyl nonadecanoate The following contents are mentioned in the article:
EN 14103 is generally used for quantification of ester content in biodiesel free of heptadecanoate ester (C17:0) or Me nonadecanoate (C19:0), which are employed as internal standards Ester content obtained by EN 14103 method did not match with theor. value of biodiesel, as the method did not take care of response factors of each component to compensate for changes in detector sensitivities. In this study, the whole range of fatty acid (C6-C24:1) Me esters were taken into consideration for the calculation of the ester content. Me nonadecanoate (C19:0) was used as an internal standard The response factors of both the saturated and unsaturated Me esters in the range C6-C24:1 were estimated and found in the range 0.97-1.16. The ester content was calculated after applying the response factors of each Me ester. The results obtained by this method agreed well with the theor. value as compared to estimated value using EN14103 method. The results obtained from this method also show good correlation (R2 = 0.98) with 1H-NMR method. Further, this method does not depend on nature of biodiesel feed stock and is applicable to all Me biodiesel samples obtained from different raw materials. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Quality Control of Methyl nonadecanoate).
Methyl nonadecanoate (cas: 1731-94-8) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Quality Control of Methyl nonadecanoate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics