GC-MS determination of phospholipid fatty acids in soil was written by Zhang, Li-ping;Wang, Chuan;Zhou, Qiao-hong;Wang, Ya-fen;Wu, Zhen-bin. And the article was included in Lihua Jianyan, Huaxue Fence in 2015.Safety of Methyl nonadecanoate The following contents are mentioned in the article:
GC-MS was applied to the determination of phospholipid fatty acids in soil. The sample was added into KOH solution with methanol as solvent. After Me esterification, fatty acid Me esters were extracted with hexane. The extract was separated on an Agilent DB-5MS column. Full-scanning mode and SIM were adopted in MS. Linear relationships were found between the peak area and the mass concentration of the 26 fatty acids Me esters in definite ranges, with detection limits (3S/N) in the range of 0.0012 – 0.2959 mg · L-1. Recovery rates measured by standard addition method were in the range of 108% – 115%, and RSDs (n = 7) were in the range of 3.2% – 6.4%. This study involved multiple reactions and reactants, such as Methyl nonadecanoate (cas: 1731-94-8Safety of Methyl nonadecanoate).
Methyl nonadecanoate (cas: 1731-94-8) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. 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.Safety of Methyl nonadecanoate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics