A Technique for Rapid Gas Chromatography Analysis Applied to Ambient Organic Aerosol Measurements from the Thermal Desorption Aerosol Gas Chromatograph (TAG) was written by Zhang, Yaping;Williams, Brent J.;Goldstein, Allen H.;Docherty, Ken;Ulbrich, Ingrid M.;Jimenez, Jose L.. And the article was included in Aerosol Science and Technology in 2014.Quality Control of 2-Ethylhexyl benzoate The following contents are mentioned in the article:
While automated techniques exist for the integration of individual gas chromatograph peaks, manual inspection of integration quality and peak choice is still required due to drifting retention times and changing peak shapes near detection limits. The feasibility of a simplified method to obtain multiple bulk species classes from complex gas chromatog. data is investigated here with data from the thermal desorption aerosol gas chromatograph (TAG). Chromatograms were divided into many “chromatog. bins” containing total eluting mass spectra (both from resolved species and unresolved complex mixture [UCM]), instead of only integrating resolved peaks as is performed in the traditional chromatog. anal. method. Pos. matrix factorization (PMF) was applied to the mass spectra of the chromatog. bins to determine major factors contributing to the observed chem. composition PMF factors are not highly sensitive to the specific PMF error estimation method applied. Increasing the number of chromatog. bins that each chromatogram was divided into improved PMF results until reaching 400 bins. Increasing the number of bins above 400 does not significantly improve the PMF results. This is likely due to 400 bin separation providing bin widths (4.6 s) that match the narrowest peak widths (4.8 s) of compounds found in the TAG chromatograms. The bin-based method took only a small fraction of the time to complete compared to peak-integrated method, significantly saving operator time and effort. Finally, high-factor solutions (e.g., 20 factors) of bin-based PMF can sep. many individual compounds, homologues compound series, and UCM from chromatog. data. Copyright 2014 American Association for Aerosol Research. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Quality Control of 2-Ethylhexyl benzoate).
2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. 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 2-Ethylhexyl benzoate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics